Merge pull request #195 from victorfisac/develop

Updated Physac to new version (library and examples)

14 files changed, 602 insertions, 328 deletions

diff --git a/examples/physics_basic_rigidbody.c b/examples/physics_basic_rigidbody.c
deleted file mode 100644
index 87316a98..00000000
--- a/examples/physics_basic_rigidbody.c
+++ /dev/null
@@ -1,135 +0,0 @@
-/*******************************************************************************************
-*
-*   raylib [physac] example - Basic rigidbody
-*
-*   This example has been created using raylib 1.5 (www.raylib.com)
-*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
-*
-*   NOTE:
-*   Physac requires multi-threading, when InitPhysics() a second thread is created to manage
-*   physics calculations. To accomplish that, physac uses pthread Win32 library that can be
-*   found inside raylib/src/external/pthread directory. 
-*
-*   Add pthread library when compiling physac example:
-*   gcc -o $(NAME_PART).exe $(FILE_NAME) $(RAYLIB_DIR)\raylib_icon -L../src/external/pthread/lib \
-*   -I../src -I../src/external/pthread/include -lraylib -lglfw3 -lopengl32 -lgdi32 -lpthreadGC2 -std=c99 -Wall
-*
-*   Note that pthreadGC2.dll must be also copied to project directory!
-*
-*   Copyright (c) 2016 Victor Fisac and Ramon Santamaria (@raysan5)
-*
-********************************************************************************************/
-
-#include "raylib.h"
-
-#define PHYSAC_IMPLEMENTATION
-#include "physac.h"
-
-#define MOVE_VELOCITY    5
-#define JUMP_VELOCITY    30
-
-int main()
-{
-    // Initialization
-    //--------------------------------------------------------------------------------------
-    int screenWidth = 800;
-    int screenHeight = 450;
-
-    InitWindow(screenWidth, screenHeight, "raylib [physac] example - basic rigidbody");
-    InitPhysics((Vector2){ 0.0f, -9.81f/2 });      // Initialize physics module
-    
-    // Debug variables
-    bool isDebug = false;
-    
-    // Create rectangle physic object
-    PhysicBody rectangle = CreatePhysicBody((Vector2){ screenWidth*0.25f, screenHeight/2 }, 0.0f, (Vector2){ 75, 50 });
-    rectangle->rigidbody.enabled = true;       // Enable physic object rigidbody behaviour
-    rectangle->rigidbody.applyGravity = true;
-    rectangle->rigidbody.friction = 0.1f;
-    rectangle->rigidbody.bounciness = 6.0f;
-    
-    // Create square physic object
-    PhysicBody square = CreatePhysicBody((Vector2){ screenWidth*0.75f, screenHeight/2 }, 0.0f, (Vector2){ 50, 50 });
-    square->rigidbody.enabled = true;      // Enable physic object rigidbody behaviour
-    square->rigidbody.applyGravity = true;
-    square->rigidbody.friction = 0.1f;
-    
-    // Create walls physic objects
-    PhysicBody floor = CreatePhysicBody((Vector2){ screenWidth/2, screenHeight*0.95f }, 0.0f, (Vector2){ screenWidth*0.9f, 100 });
-    PhysicBody leftWall = CreatePhysicBody((Vector2){ 0.0f, screenHeight/2 }, 0.0f, (Vector2){ screenWidth*0.1f, screenHeight });
-    PhysicBody rightWall = CreatePhysicBody((Vector2){ screenWidth, screenHeight/2 }, 0.0f, (Vector2){ screenWidth*0.1f, screenHeight });
-    PhysicBody roof = CreatePhysicBody((Vector2){ screenWidth/2, screenHeight*0.05f }, 0.0f, (Vector2){ screenWidth*0.9f, 100 });
-    
-    // Create pplatform physic object
-    PhysicBody platform = CreatePhysicBody((Vector2){ screenWidth/2, screenHeight*0.7f }, 0.0f, (Vector2){ screenWidth*0.25f, 20 });
-    
-    SetTargetFPS(60);
-    //--------------------------------------------------------------------------------------
-
-    // Main game loop
-    while (!WindowShouldClose())    // Detect window close button or ESC key
-    {
-        // Update
-        //----------------------------------------------------------------------------------        
-        // Check rectangle movement inputs
-        if (IsKeyPressed('W')) rectangle->rigidbody.velocity.y = JUMP_VELOCITY;
-        if (IsKeyDown('A')) rectangle->rigidbody.velocity.x = -MOVE_VELOCITY;
-        else if (IsKeyDown('D')) rectangle->rigidbody.velocity.x = MOVE_VELOCITY;
-        
-        // Check square movement inputs
-        if (IsKeyDown(KEY_UP) && square->rigidbody.isGrounded) square->rigidbody.velocity.y = JUMP_VELOCITY;
-        if (IsKeyDown(KEY_LEFT)) square->rigidbody.velocity.x = -MOVE_VELOCITY;
-        else if (IsKeyDown(KEY_RIGHT)) square->rigidbody.velocity.x = MOVE_VELOCITY;
-        
-        // Check debug switch input
-        if (IsKeyPressed('P')) isDebug = !isDebug;
-        //----------------------------------------------------------------------------------
-
-        // Draw
-        //----------------------------------------------------------------------------------
-        BeginDrawing();
-
-            ClearBackground(RAYWHITE);
-
-            // Draw floor, roof and walls rectangles
-            DrawRectangleRec(TransformToRectangle(floor->transform), DARKGRAY);         // Convert transform values to rectangle data type variable
-            DrawRectangleRec(TransformToRectangle(leftWall->transform), DARKGRAY);
-            DrawRectangleRec(TransformToRectangle(rightWall->transform), DARKGRAY);
-            DrawRectangleRec(TransformToRectangle(roof->transform), DARKGRAY);
-            
-            // Draw middle platform rectangle
-            DrawRectangleRec(TransformToRectangle(platform->transform), DARKGRAY);
-            
-            // Draw physic objects
-            DrawRectangleRec(TransformToRectangle(rectangle->transform), RED);
-            DrawRectangleRec(TransformToRectangle(square->transform), BLUE);
-            
-            // Draw collider lines if debug is enabled
-            if (isDebug)
-            {
-                DrawRectangleLines(floor->collider.bounds.x, floor->collider.bounds.y, floor->collider.bounds.width, floor->collider.bounds.height, GREEN);
-                DrawRectangleLines(leftWall->collider.bounds.x, leftWall->collider.bounds.y, leftWall->collider.bounds.width, leftWall->collider.bounds.height, GREEN);
-                DrawRectangleLines(rightWall->collider.bounds.x, rightWall->collider.bounds.y, rightWall->collider.bounds.width, rightWall->collider.bounds.height, GREEN);
-                DrawRectangleLines(roof->collider.bounds.x, roof->collider.bounds.y, roof->collider.bounds.width, roof->collider.bounds.height, GREEN);
-                DrawRectangleLines(platform->collider.bounds.x, platform->collider.bounds.y, platform->collider.bounds.width, platform->collider.bounds.height, GREEN);
-                DrawRectangleLines(rectangle->collider.bounds.x, rectangle->collider.bounds.y, rectangle->collider.bounds.width, rectangle->collider.bounds.height, GREEN);
-                DrawRectangleLines(square->collider.bounds.x, square->collider.bounds.y, square->collider.bounds.width, square->collider.bounds.height, GREEN);
-            }
-            
-            // Draw help message
-            DrawText("Use WASD to move rectangle and ARROWS to move square", screenWidth/2 - MeasureText("Use WASD to move rectangle and ARROWS to move square", 20)/2, screenHeight*0.075f, 20, LIGHTGRAY);
-
-            DrawFPS(10, 10);
-            
-        EndDrawing();
-        //----------------------------------------------------------------------------------
-    }
-
-    // De-Initialization
-    //--------------------------------------------------------------------------------------
-    ClosePhysics();       // Unitialize physics (including all loaded objects)
-    CloseWindow();        // Close window and OpenGL context
-    //--------------------------------------------------------------------------------------
-
-    return 0;
-}
\ No newline at end of file
diff --git a/examples/physics_basic_rigidbody.png b/examples/physics_basic_rigidbody.png
deleted file mode 100644
index 52f265ac..00000000
--- a/examples/physics_basic_rigidbody.png
+++ /dev/null
diff --git a/examples/physics_demo.c b/examples/physics_demo.c
new file mode 100644
index 00000000..bed7c94d
--- /dev/null
+++ b/examples/physics_demo.c
@@ -0,0 +1,122 @@
+/*******************************************************************************************
+*
+*   Physac - Physics demo
+*
+*   NOTE: Physac requires multi-threading, when InitPhysics() a second thread is created to manage physics calculations.
+*   The file pthreadGC2.dll is required to run the program; you can find it in 'src\external'
+*
+*   Copyright (c) 2016 Victor Fisac
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define PHYSAC_IMPLEMENTATION
+#include "..\src\physac.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);
+    InitWindow(screenWidth, screenHeight, "Physac [raylib] - Physics demo");
+    SetTargetFPS(60);
+
+    // Physac logo drawing position
+    int logoX = screenWidth - MeasureText("Physac", 30) - 10;
+    int logoY = 15;
+
+    // Initialize physics and default physics bodies
+    InitPhysics();
+
+    // Create floor rectangle physics body
+    PhysicsBody floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight }, 500, 100, 10);
+    floor->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
+
+    // Create obstacle circle physics body
+    PhysicsBody circle = CreatePhysicsBodyCircle((Vector2){ screenWidth/2, screenHeight/2 }, 45, 10);
+    circle->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed('R'))    // Reset physics input
+        {
+            ResetPhysics();
+
+            floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight }, 500, 100, 10);
+            floor->enabled = false;
+
+            circle = CreatePhysicsBodyCircle((Vector2){ screenWidth/2, screenHeight/2 }, 45, 10);
+            circle->enabled = false;
+        }
+
+        // Physics body creation inputs
+        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) CreatePhysicsBodyPolygon(GetMousePosition(), GetRandomValue(20, 80), GetRandomValue(3, 8), 10);
+        else if (IsMouseButtonPressed(MOUSE_RIGHT_BUTTON)) CreatePhysicsBodyCircle(GetMousePosition(), GetRandomValue(10, 45), 10);
+
+        // Destroy falling physics bodies
+        int bodiesCount = GetPhysicsBodiesCount();
+        for (int i = bodiesCount - 1; i >= 0; i--)
+        {
+            PhysicsBody body = GetPhysicsBody(i);
+            if (body != NULL && (body->position.y > screenHeight*2)) DestroyPhysicsBody(body);
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(BLACK);
+
+            DrawFPS(screenWidth - 90, screenHeight - 30);
+
+            // Draw created physics bodies
+            bodiesCount = GetPhysicsBodiesCount();
+            for (int i = 0; i < bodiesCount; i++)
+            {
+                PhysicsBody body = GetPhysicsBody(i);
+
+                if (body != NULL)
+                {
+                    int vertexCount = GetPhysicsShapeVerticesCount(i);
+                    for (int j = 0; j < vertexCount; j++)
+                    {
+                        // Get physics bodies shape vertices to draw lines
+                        // Note: GetPhysicsShapeVertex() already calculates rotation transformations
+                        Vector2 vertexA = GetPhysicsShapeVertex(body, j);
+
+                        int jj = (((j + 1) < vertexCount) ? (j + 1) : 0);   // Get next vertex or first to close the shape
+                        Vector2 vertexB = GetPhysicsShapeVertex(body, jj);
+
+                        DrawLineV(vertexA, vertexB, GREEN);     // Draw a line between two vertex positions
+                    }
+                }
+            }
+
+            DrawText("Left mouse button to create a polygon", 10, 10, 10, WHITE);
+            DrawText("Right mouse button to create a circle", 10, 25, 10, WHITE);
+            DrawText("Press 'R' to reset example", 10, 40, 10, WHITE);
+
+            DrawText("Physac", logoX, logoY, 30, WHITE);
+            DrawText("Powered by", logoX + 50, logoY - 7, 10, WHITE);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    ClosePhysics();       // Unitialize physics
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
diff --git a/examples/physics_demo.png b/examples/physics_demo.png
new file mode 100644
index 00000000..12dc7e72
--- /dev/null
+++ b/examples/physics_demo.png
diff --git a/examples/physics_forces.c b/examples/physics_forces.c
deleted file mode 100644
index e45cb44c..00000000
--- a/examples/physics_forces.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/*******************************************************************************************
-*
-*   raylib [physac] example - Forces
-*
-*   This example has been created using raylib 1.5 (www.raylib.com)
-*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
-*
-*   NOTE:
-*   Physac requires multi-threading, when InitPhysics() a second thread is created to manage
-*   physics calculations. To accomplish that, physac uses pthread Win32 library that can be
-*   found inside raylib/src/external/pthread directory. 
-*
-*   Add pthread library when compiling physac example:
-*   gcc -o $(NAME_PART).exe $(FILE_NAME) $(RAYLIB_DIR)\raylib_icon -L../src/external/pthread/lib \
-*   -I../src -I../src/external/pthread/include -lraylib -lglfw3 -lopengl32 -lgdi32 -lpthreadGC2 -std=c99 -Wall
-*
-*   Note that pthreadGC2.dll must be also copied to project directory!
-*
-*   Copyright (c) 2016 Victor Fisac and Ramon Santamaria (@raysan5)
-*
-********************************************************************************************/
-
-#include "raylib.h"
-
-#define PHYSAC_IMPLEMENTATION
-#include "physac.h"
-
-#define FORCE_AMOUNT        5.0f
-#define FORCE_RADIUS        150
-#define LINE_LENGTH         75
-#define TRIANGLE_LENGTH     12
-
-int main()
-{
-    // Initialization
-    //--------------------------------------------------------------------------------------
-    int screenWidth = 800;
-    int screenHeight = 450;
-
-    InitWindow(screenWidth, screenHeight, "raylib [physac] example - forces");
-    InitPhysics((Vector2){ 0.0f, -9.81f/2 });      // Initialize physics module
-    
-    // Global variables
-    Vector2 mousePosition;
-    bool isDebug = false;
-    
-    // Create rectangle physic objects
-    PhysicBody rectangles[3];
-    for (int i = 0; i < 3; i++)
-    {
-        rectangles[i] = CreatePhysicBody((Vector2){ screenWidth/4*(i+1), (((i % 2) == 0) ? (screenHeight/3) : (screenHeight/1.5f)) }, 0.0f, (Vector2){ 50, 50 });
-        rectangles[i]->rigidbody.enabled = true;       // Enable physic object rigidbody behaviour
-        rectangles[i]->rigidbody.friction = 0.1f;
-    }
-    
-    // Create circles physic objects
-    // NOTE: when creating circle physic objects, transform.scale must be { 0, 0 } and object radius must be defined in collider.radius and use this value to draw the circle.
-    PhysicBody circles[3];
-    for (int i = 0; i < 3; i++)
-    {
-        circles[i] = CreatePhysicBody((Vector2){ screenWidth/4*(i+1), (((i % 2) == 0) ? (screenHeight/1.5f) : (screenHeight/4)) }, 0.0f, (Vector2){ 0, 0 });
-        circles[i]->rigidbody.enabled = true;       // Enable physic object rigidbody behaviour
-        circles[i]->rigidbody.friction = 0.1f;
-        circles[i]->collider.type = COLLIDER_CIRCLE;
-        circles[i]->collider.radius = 25;
-    }
-    
-    // Create walls physic objects
-    PhysicBody leftWall = CreatePhysicBody((Vector2){ -25, screenHeight/2 }, 0.0f, (Vector2){ 50, screenHeight });
-    PhysicBody rightWall = CreatePhysicBody((Vector2){ screenWidth + 25, screenHeight/2 }, 0.0f, (Vector2){ 50, screenHeight });
-    PhysicBody topWall = CreatePhysicBody((Vector2){ screenWidth/2, -25 }, 0.0f, (Vector2){ screenWidth, 50 });
-    PhysicBody bottomWall = CreatePhysicBody((Vector2){ screenWidth/2, screenHeight + 25 }, 0.0f, (Vector2){ screenWidth, 50 });
-    
-    SetTargetFPS(60);
-    //--------------------------------------------------------------------------------------
-
-    // Main game loop
-    while (!WindowShouldClose())    // Detect window close button or ESC key
-    {
-        // Update
-        //----------------------------------------------------------------------------------
-        
-        // Update mouse position value
-        mousePosition = GetMousePosition();
-        
-        // Check force input
-        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) ApplyForceAtPosition(mousePosition, FORCE_AMOUNT, FORCE_RADIUS);
-        
-        // Check reset input
-        if (IsKeyPressed('R'))
-        {
-            // Reset rectangle physic objects positions
-            for (int i = 0; i < 3; i++)
-            {
-                rectangles[i]->transform.position = (Vector2){ screenWidth/4*(i+1) - rectangles[i]->transform.scale.x/2, (((i % 2) == 0) ? (screenHeight/3) : (screenHeight/1.5f)) - rectangles[i]->transform.scale.y/2 };
-                rectangles[i]->rigidbody.velocity =(Vector2){ 0.0f, 0.0f };
-            }
-            
-            // Reset circles physic objects positions
-            for (int i = 0; i < 3; i++)
-            {
-                circles[i]->transform.position = (Vector2){ screenWidth/4*(i+1), (((i % 2) == 0) ? (screenHeight/1.5f) : (screenHeight/4)) };
-                circles[i]->rigidbody.velocity =(Vector2){ 0.0f, 0.0f };
-            }
-        }
-        
-        // Check debug switch input
-        if (IsKeyPressed('P')) isDebug = !isDebug;
-        //----------------------------------------------------------------------------------
-
-        // Draw
-        //----------------------------------------------------------------------------------
-        BeginDrawing();
-
-            ClearBackground(RAYWHITE);
-
-            // Draw rectangles
-            for (int i = 0; i < 3; i++)
-            {
-                // Convert transform values to rectangle data type variable
-                DrawRectangleRec(TransformToRectangle(rectangles[i]->transform), RED);
-                if (isDebug) DrawRectangleLines(rectangles[i]->collider.bounds.x, rectangles[i]->collider.bounds.y, rectangles[i]->collider.bounds.width, rectangles[i]->collider.bounds.height, GREEN);
-
-                // Draw force radius
-                DrawCircleLines(mousePosition.x, mousePosition.y, FORCE_RADIUS, BLACK);
-                
-                // Draw direction lines
-                if (CheckCollisionPointCircle((Vector2){ rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2, rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 }, mousePosition, FORCE_RADIUS))
-                {
-                    Vector2 direction = { rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2 - mousePosition.x, rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 - mousePosition.y };
-                    float angle = atan2l(direction.y, direction.x);
-                    
-                    // Calculate arrow start and end positions
-                    Vector2 startPosition = { rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2, rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 };
-                    Vector2 endPosition = { rectangles[i]->transform.position.x + rectangles[i]->transform.scale.x/2 + (cos(angle)*LINE_LENGTH), rectangles[i]->transform.position.y + rectangles[i]->transform.scale.y/2 + (sin(angle)*LINE_LENGTH) };
-                    
-                    // Draw arrow line
-                    DrawLineV(startPosition, endPosition, BLACK);
-                    
-                    // Draw arrow triangle
-                    DrawTriangleLines((Vector2){ endPosition.x - cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y - sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH },
-                                      (Vector2){ endPosition.x + cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y + sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH },
-                                      (Vector2){ endPosition.x + cos(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2, endPosition.y + sin(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2 }, BLACK);
-                }
-            }
-            
-            // Draw circles
-            for (int i = 0; i < 3; i++)
-            {
-                DrawCircleV(circles[i]->transform.position, circles[i]->collider.radius, BLUE);
-                if (isDebug) DrawCircleLines(circles[i]->transform.position.x, circles[i]->transform.position.y, circles[i]->collider.radius, GREEN);
-
-                // Draw force radius
-                DrawCircleLines(mousePosition.x, mousePosition.y, FORCE_RADIUS, BLACK);
-                
-                // Draw direction lines
-                if (CheckCollisionPointCircle((Vector2){ circles[i]->transform.position.x, circles[i]->transform.position.y }, mousePosition, FORCE_RADIUS))
-                {
-                    Vector2 direction = { circles[i]->transform.position.x - mousePosition.x, circles[i]->transform.position.y - mousePosition.y };
-                    float angle = atan2l(direction.y, direction.x);
-                    
-                    // Calculate arrow start and end positions
-                    Vector2 startPosition = { circles[i]->transform.position.x, circles[i]->transform.position.y };
-                    Vector2 endPosition = { circles[i]->transform.position.x + (cos(angle)*LINE_LENGTH), circles[i]->transform.position.y + (sin(angle)*LINE_LENGTH) };
-                    
-                    // Draw arrow line
-                    DrawLineV(startPosition, endPosition, BLACK);
-                    
-                    // Draw arrow triangle
-                    DrawTriangleLines((Vector2){ endPosition.x - cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y - sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH },
-                                      (Vector2){ endPosition.x + cos(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH, endPosition.y + sin(angle + 90*DEG2RAD)*LINE_LENGTH/TRIANGLE_LENGTH },
-                                      (Vector2){ endPosition.x + cos(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2, endPosition.y + sin(angle)*LINE_LENGTH/TRIANGLE_LENGTH*2 }, BLACK);
-                }
-            }
-            
-            // Draw help messages
-            DrawText("Use LEFT MOUSE BUTTON to apply a force", screenWidth/2 - MeasureText("Use LEFT MOUSE BUTTON to apply a force", 20)/2, screenHeight*0.075f, 20, LIGHTGRAY);
-            DrawText("Use R to reset objects position", screenWidth/2 - MeasureText("Use R to reset objects position", 20)/2, screenHeight*0.875f, 20, GRAY);
-            
-            DrawFPS(10, 10);
-
-        EndDrawing();
-        //----------------------------------------------------------------------------------
-    }
-
-    // De-Initialization
-    //--------------------------------------------------------------------------------------
-    ClosePhysics();       // Unitialize physics module
-    CloseWindow();        // Close window and OpenGL context
-    //--------------------------------------------------------------------------------------
-
-    return 0;
-}
\ No newline at end of file
diff --git a/examples/physics_forces.png b/examples/physics_forces.png
deleted file mode 100644
index 832bdbd9..00000000
--- a/examples/physics_forces.png
+++ /dev/null
diff --git a/examples/physics_friction.c b/examples/physics_friction.c
new file mode 100644
index 00000000..28d3c4b8
--- /dev/null
+++ b/examples/physics_friction.c
@@ -0,0 +1,136 @@
+/*******************************************************************************************
+*
+*   Physac - Physics friction
+*
+*   NOTE: Physac requires multi-threading, when InitPhysics() a second thread is created to manage physics calculations.
+*   The file pthreadGC2.dll is required to run the program; you can find it in 'src\external'
+*
+*   Copyright (c) 2016 Victor Fisac
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define PHYSAC_IMPLEMENTATION
+#include "..\src\physac.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);
+    InitWindow(screenWidth, screenHeight, "Physac [raylib] - Physics friction");
+    SetTargetFPS(60);
+
+    // Physac logo drawing position
+    int logoX = screenWidth - MeasureText("Physac", 30) - 10;
+    int logoY = 15;
+
+    // Initialize physics and default physics bodies
+    InitPhysics();
+
+    // Create floor rectangle physics body
+    PhysicsBody floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight }, screenWidth, 100, 10);
+    floor->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
+    PhysicsBody wall = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight*0.8f }, 10, 80, 10);
+    wall->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
+
+    // Create left ramp physics body
+    PhysicsBody rectLeft = CreatePhysicsBodyRectangle((Vector2){ 25, screenHeight - 5 }, 250, 250, 10);
+    rectLeft->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
+    SetPhysicsBodyRotation(rectLeft, 30*DEG2RAD);
+
+    // Create right ramp  physics body
+    PhysicsBody rectRight = CreatePhysicsBodyRectangle((Vector2){ screenWidth - 25, screenHeight - 5 }, 250, 250, 10);
+    rectRight->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
+    SetPhysicsBodyRotation(rectRight, 330*DEG2RAD);
+
+    // Create dynamic physics bodies
+    PhysicsBody bodyA = CreatePhysicsBodyRectangle((Vector2){ 35, screenHeight*0.6f }, 40, 40, 10);
+    bodyA->staticFriction = 0.1f;
+    bodyA->dynamicFriction = 0.1f;
+    SetPhysicsBodyRotation(bodyA, 30*DEG2RAD);
+
+    PhysicsBody bodyB = CreatePhysicsBodyRectangle((Vector2){ screenWidth - 35, screenHeight*0.6f }, 40, 40, 10);
+    bodyB->staticFriction = 1;
+    bodyB->dynamicFriction = 1;
+    SetPhysicsBodyRotation(bodyB, 330*DEG2RAD);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed('R'))    // Reset physics input
+        {
+            // Reset dynamic physics bodies position, velocity and rotation
+            bodyA->position = (Vector2){ 35, screenHeight*0.6f };
+            bodyA->velocity = (Vector2){ 0, 0 };
+            bodyA->angularVelocity = 0;
+            SetPhysicsBodyRotation(bodyA, 30*DEG2RAD);
+            
+            bodyB->position = (Vector2){ screenWidth - 35, screenHeight*0.6f };
+            bodyB->velocity = (Vector2){ 0, 0 };
+            bodyB->angularVelocity = 0;
+            SetPhysicsBodyRotation(bodyB, 330*DEG2RAD);
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(BLACK);
+
+            DrawFPS(screenWidth - 90, screenHeight - 30);
+
+            // Draw created physics bodies
+            int bodiesCount = GetPhysicsBodiesCount();
+            for (int i = 0; i < bodiesCount; i++)
+            {
+                PhysicsBody body = GetPhysicsBody(i);
+
+                if (body != NULL)
+                {
+                    int vertexCount = GetPhysicsShapeVerticesCount(i);
+                    for (int j = 0; j < vertexCount; j++)
+                    {
+                        // Get physics bodies shape vertices to draw lines
+                        // Note: GetPhysicsShapeVertex() already calculates rotation transformations
+                        Vector2 vertexA = GetPhysicsShapeVertex(body, j);
+
+                        int jj = (((j + 1) < vertexCount) ? (j + 1) : 0);   // Get next vertex or first to close the shape
+                        Vector2 vertexB = GetPhysicsShapeVertex(body, jj);
+
+                        DrawLineV(vertexA, vertexB, GREEN);     // Draw a line between two vertex positions
+                    }
+                }
+            }
+
+            DrawRectangle(0, screenHeight - 49, screenWidth, 49, BLACK);
+
+            DrawText("Friction amount", (screenWidth - MeasureText("Friction amount", 30))/2, 75, 30, WHITE);
+            DrawText("0.1", bodyA->position.x - MeasureText("0.1", 20)/2, bodyA->position.y - 7, 20, WHITE);
+            DrawText("1", bodyB->position.x - MeasureText("1", 20)/2, bodyB->position.y - 7, 20, WHITE);
+
+            DrawText("Press 'R' to reset example", 10, 10, 10, WHITE);
+
+            DrawText("Physac", logoX, logoY, 30, WHITE);
+            DrawText("Powered by", logoX + 50, logoY - 7, 10, WHITE);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    ClosePhysics();       // Unitialize physics
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
diff --git a/examples/physics_friction.png b/examples/physics_friction.png
new file mode 100644
index 00000000..e791ec2b
--- /dev/null
+++ b/examples/physics_friction.png
diff --git a/examples/physics_movement.c b/examples/physics_movement.c
new file mode 100644
index 00000000..ca18f3df
--- /dev/null
+++ b/examples/physics_movement.c
@@ -0,0 +1,122 @@
+/*******************************************************************************************
+*
+*   Physac - Physics movement
+*
+*   NOTE: Physac requires multi-threading, when InitPhysics() a second thread is created to manage physics calculations.
+*   The file pthreadGC2.dll is required to run the program; you can find it in 'src\external'
+*
+*   Copyright (c) 2016 Victor Fisac
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define PHYSAC_IMPLEMENTATION
+#include "..\src\physac.h"
+
+#define     VELOCITY    0.5f
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);
+    InitWindow(screenWidth, screenHeight, "Physac [raylib] - Physics movement");
+    SetTargetFPS(60);
+
+    // Physac logo drawing position
+    int logoX = screenWidth - MeasureText("Physac", 30) - 10;
+    int logoY = 15;
+
+    // Initialize physics and default physics bodies
+    InitPhysics();
+
+    // Create floor and walls rectangle physics body
+    PhysicsBody floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight }, screenWidth, 100, 10);
+    PhysicsBody platformLeft = CreatePhysicsBodyRectangle((Vector2){ screenWidth*0.25f, screenHeight*0.6f }, screenWidth*0.25f, 10, 10);
+    PhysicsBody platformRight = CreatePhysicsBodyRectangle((Vector2){ screenWidth*0.75f, screenHeight*0.6f }, screenWidth*0.25f, 10, 10);
+    PhysicsBody wallLeft = CreatePhysicsBodyRectangle((Vector2){ -5, screenHeight/2 }, 10, screenHeight, 10);
+    PhysicsBody wallRight = CreatePhysicsBodyRectangle((Vector2){ screenWidth + 5, screenHeight/2 }, 10, screenHeight, 10);
+
+    // Disable dynamics to floor and walls physics bodies
+    floor->enabled = false;
+    platformLeft->enabled = false;
+    platformRight->enabled = false;
+    wallLeft->enabled = false;
+    wallRight->enabled = false;
+
+    // Create movement physics body
+    PhysicsBody body = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight/2 }, 50, 50, 1);
+    body->freezeOrient = true;  // Constrain body rotation to avoid little collision torque amounts
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed('R'))    // Reset physics input
+        {
+            // Reset movement physics body position, velocity and rotation
+            body->position = (Vector2){ screenWidth/2, screenHeight/2 };
+            body->velocity = (Vector2){ 0, 0 };
+            SetPhysicsBodyRotation(body, 0);
+        }
+
+        // Horizontal movement input
+        if (IsKeyDown(KEY_RIGHT)) body->velocity.x = VELOCITY;
+        else if (IsKeyDown(KEY_LEFT)) body->velocity.x = -VELOCITY;
+
+        // Vertical movement input checking if player physics body is grounded
+        if (IsKeyDown(KEY_UP) && body->isGrounded) body->velocity.y = -VELOCITY*4;
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(BLACK);
+
+            DrawFPS(screenWidth - 90, screenHeight - 30);
+
+            // Draw created physics bodies
+            int bodiesCount = GetPhysicsBodiesCount();
+            for (int i = 0; i < bodiesCount; i++)
+            {
+                PhysicsBody body = GetPhysicsBody(i);
+
+                int vertexCount = GetPhysicsShapeVerticesCount(i);
+                for (int j = 0; j < vertexCount; j++)
+                {
+                    // Get physics bodies shape vertices to draw lines
+                    // Note: GetPhysicsShapeVertex() already calculates rotation transformations
+                    Vector2 vertexA = GetPhysicsShapeVertex(body, j);
+
+                    int jj = (((j + 1) < vertexCount) ? (j + 1) : 0);   // Get next vertex or first to close the shape
+                    Vector2 vertexB = GetPhysicsShapeVertex(body, jj);
+
+                    DrawLineV(vertexA, vertexB, GREEN);     // Draw a line between two vertex positions
+                }
+            }
+
+            DrawText("Use 'ARROWS' to move player", 10, 10, 10, WHITE);
+            DrawText("Press 'R' to reset example", 10, 30, 10, WHITE);
+
+            DrawText("Physac", logoX, logoY, 30, WHITE);
+            DrawText("Powered by", logoX + 50, logoY - 7, 10, WHITE);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    ClosePhysics();       // Unitialize physics
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
diff --git a/examples/physics_movement.png b/examples/physics_movement.png
new file mode 100644
index 00000000..a88a7d79
--- /dev/null
+++ b/examples/physics_movement.png
diff --git a/examples/physics_restitution.c b/examples/physics_restitution.c
new file mode 100644
index 00000000..3543db69
--- /dev/null
+++ b/examples/physics_restitution.c
@@ -0,0 +1,115 @@
+/*******************************************************************************************
+*
+*   Physac - Physics restitution
+*
+*   NOTE: Physac requires multi-threading, when InitPhysics() a second thread is created to manage physics calculations.
+*   The file pthreadGC2.dll is required to run the program; you can find it in 'src\external'
+*
+*   Copyright (c) 2016 Victor Fisac
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define PHYSAC_IMPLEMENTATION
+#include "..\src\physac.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);
+    InitWindow(screenWidth, screenHeight, "Physac [raylib] - Physics restitution");
+    SetTargetFPS(60);
+
+    // Physac logo drawing position
+    int logoX = screenWidth - MeasureText("Physac", 30) - 10;
+    int logoY = 15;
+
+    // Initialize physics and default physics bodies
+    InitPhysics();
+
+    // Create floor rectangle physics body
+    PhysicsBody floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2, screenHeight }, screenWidth, 100, 10);
+    floor->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
+    floor->restitution = 1;
+
+    // Create circles physics body
+    PhysicsBody circleA = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.25f, screenHeight/2 }, 30, 10);
+    circleA->restitution = 0;
+    PhysicsBody circleB = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.5f, screenHeight/2 }, 30, 10);
+    circleB->restitution = 0.5f;
+    PhysicsBody circleC = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.75f, screenHeight/2 }, 30, 10);
+    circleC->restitution = 1;
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed('R'))    // Reset physics input
+        {
+            // Reset circles physics bodies position and velocity
+            circleA->position = (Vector2){ screenWidth*0.25f, screenHeight/2 };
+            circleA->velocity = (Vector2){ 0, 0 };
+            circleB->position = (Vector2){ screenWidth*0.5f, screenHeight/2 };
+            circleB->velocity = (Vector2){ 0, 0 };
+            circleC->position = (Vector2){ screenWidth*0.75f, screenHeight/2 };
+            circleC->velocity = (Vector2){ 0, 0 };
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(BLACK);
+
+            DrawFPS(screenWidth - 90, screenHeight - 30);
+
+            // Draw created physics bodies
+            int bodiesCount = GetPhysicsBodiesCount();
+            for (int i = 0; i < bodiesCount; i++)
+            {
+                PhysicsBody body = GetPhysicsBody(i);
+
+                int vertexCount = GetPhysicsShapeVerticesCount(i);
+                for (int j = 0; j < vertexCount; j++)
+                {
+                    // Get physics bodies shape vertices to draw lines
+                    // Note: GetPhysicsShapeVertex() already calculates rotation transformations
+                    Vector2 vertexA = GetPhysicsShapeVertex(body, j);
+
+                    int jj = (((j + 1) < vertexCount) ? (j + 1) : 0);   // Get next vertex or first to close the shape
+                    Vector2 vertexB = GetPhysicsShapeVertex(body, jj);
+
+                    DrawLineV(vertexA, vertexB, GREEN);     // Draw a line between two vertex positions
+                }
+            }
+
+            DrawText("Restitution amount", (screenWidth - MeasureText("Restitution amount", 30))/2, 75, 30, WHITE);
+            DrawText("0", circleA->position.x - MeasureText("0", 20)/2, circleA->position.y - 7, 20, WHITE);
+            DrawText("0.5", circleB->position.x - MeasureText("0.5", 20)/2, circleB->position.y - 7, 20, WHITE);
+            DrawText("1", circleC->position.x - MeasureText("1", 20)/2, circleC->position.y - 7, 20, WHITE);
+
+            DrawText("Press 'R' to reset example", 10, 10, 10, WHITE);
+
+            DrawText("Physac", logoX, logoY, 30, WHITE);
+            DrawText("Powered by", logoX + 50, logoY - 7, 10, WHITE);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    ClosePhysics();       // Unitialize physics
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
diff --git a/examples/physics_restitution.png b/examples/physics_restitution.png
new file mode 100644
index 00000000..8ec4b3f3
--- /dev/null
+++ b/examples/physics_restitution.png
diff --git a/examples/physics_shatter.c b/examples/physics_shatter.c
new file mode 100644
index 00000000..2cb9d195
--- /dev/null
+++ b/examples/physics_shatter.c
@@ -0,0 +1,107 @@
+/*******************************************************************************************
+*
+*   Physac - Body shatter
+*
+*   NOTE: Physac requires multi-threading, when InitPhysics() a second thread is created to manage physics calculations.
+*   The file pthreadGC2.dll is required to run the program; you can find it in 'src\external'
+*
+*   Copyright (c) 2016 Victor Fisac
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define PHYSAC_IMPLEMENTATION
+#include "..\src\physac.h" 
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    SetConfigFlags(FLAG_MSAA_4X_HINT);
+    InitWindow(screenWidth, screenHeight, "Physac [raylib] - Body shatter");
+    SetTargetFPS(60);
+
+    // Physac logo drawing position
+    int logoX = screenWidth - MeasureText("Physac", 30) - 10;
+    int logoY = 15;
+
+    // Initialize physics and default physics bodies
+    InitPhysics();
+    SetPhysicsGravity(0, 0);
+
+    // Create random polygon physics body to shatter
+    PhysicsBody body = CreatePhysicsBodyPolygon((Vector2){ screenWidth/2, screenHeight/2 }, GetRandomValue(80, 200), GetRandomValue(3, 8), 10);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsKeyPressed('R'))    // Reset physics input
+        {
+            ResetPhysics();
+
+            // Create random polygon physics body to shatter
+            body = CreatePhysicsBodyPolygon((Vector2){ screenWidth/2, screenHeight/2 }, GetRandomValue(80, 200), GetRandomValue(3, 8), 10);
+        }
+
+        if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON))    // Physics shatter input
+        {
+            // Note: some values need to be stored in variables due to asynchronous changes during main thread
+            int count = GetPhysicsBodiesCount();
+            for (int i = count - 1; i >= 0; i--)
+            {
+                PhysicsBody currentBody = GetPhysicsBody(i);
+                if (currentBody != NULL) PhysicsShatter(currentBody, GetMousePosition(), 10/currentBody->inverseMass);
+            }
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(BLACK);
+
+            // Draw created physics bodies
+            int bodiesCount = GetPhysicsBodiesCount();
+            for (int i = 0; i < bodiesCount; i++)
+            {
+                PhysicsBody currentBody = GetPhysicsBody(i);
+
+                int vertexCount = GetPhysicsShapeVerticesCount(i);
+                for (int j = 0; j < vertexCount; j++)
+                {
+                    // Get physics bodies shape vertices to draw lines
+                    // Note: GetPhysicsShapeVertex() already calculates rotation transformations
+                    Vector2 vertexA = GetPhysicsShapeVertex(currentBody, j);
+
+                    int jj = (((j + 1) < vertexCount) ? (j + 1) : 0);   // Get next vertex or first to close the shape
+                    Vector2 vertexB = GetPhysicsShapeVertex(currentBody, jj);
+
+                    DrawLineV(vertexA, vertexB, GREEN);     // Draw a line between two vertex positions
+                }
+            }
+
+            DrawText("Left mouse button in polygon area to shatter body\nPress 'R' to reset example", 10, 10, 10, WHITE);
+
+            DrawText("Physac", logoX, logoY, 30, WHITE);
+            DrawText("Powered by", logoX + 50, logoY - 7, 10, WHITE);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------   
+    ClosePhysics();       // Unitialize physics
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
diff --git a/examples/physics_shatter.png b/examples/physics_shatter.png
new file mode 100644
index 00000000..68f9a1b7
--- /dev/null
+++ b/examples/physics_shatter.png