New examples added

14 files changed, 292 insertions, 19 deletions

diff --git a/examples/core_3d_camera_free.c b/examples/core_3d_camera_free.c
index 9e123b04..b54a99c1 100644
--- a/examples/core_3d_camera_free.c
+++ b/examples/core_3d_camera_free.c
@@ -5,7 +5,7 @@
 *   This example has been created using raylib 1.3 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
-*   Copyright (c) 2014 Ramon Santamaria (@raysan5)
+*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 
diff --git a/examples/core_3d_picking.c b/examples/core_3d_picking.c
index 056dcd65..28503570 100644
--- a/examples/core_3d_picking.c
+++ b/examples/core_3d_picking.c
@@ -5,7 +5,7 @@
 *   This example has been created using raylib 1.3 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
-*   Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
+*   Copyright (c) 2015 Ramon Santamaria (Ray San - raysan@raysanweb.com)
 *
 ********************************************************************************************/
 
diff --git a/examples/core_drop_files.c b/examples/core_drop_files.c
new file mode 100644
index 00000000..5802e48f
--- /dev/null
+++ b/examples/core_drop_files.c
@@ -0,0 +1,74 @@
+/*******************************************************************************************
+*
+*   raylib [core] example - Windows drop files
+*
+*   This example has been created using raylib 1.3 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - drop files");
+    
+    int count = 0;
+    char **droppedFiles;
+    
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (IsFileDropped())
+        {
+            droppedFiles = GetDroppedFiles(&count);
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            if (count == 0) DrawText("Drop your files to this window!", 100, 40, 20, DARKGRAY);
+            else
+            {
+                DrawText("Dropped files:", 100, 40, 20, DARKGRAY);
+                
+                for (int i = 0; i < count; i++)
+                {
+                    if (i%2 == 0) DrawRectangle(0, 85 + 40*i, screenWidth, 40, Fade(LIGHTGRAY, 0.5f));
+                    else DrawRectangle(0, 85 + 40*i, screenWidth, 40, Fade(LIGHTGRAY, 0.3f));
+                    
+                    DrawText(droppedFiles[i], 120, 100 + 40*i, 10, GRAY);
+                }
+                
+                DrawText("Drop new files...", 100, 110 + 40*count, 20, DARKGRAY);
+            }
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    ClearDroppedFiles();    // Clear internal buffers
+    
+    CloseWindow();          // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
\ No newline at end of file
diff --git a/examples/core_drop_files.png b/examples/core_drop_files.png
new file mode 100644
index 00000000..d46c44cf
--- /dev/null
+++ b/examples/core_drop_files.png
diff --git a/examples/models_billboard.c b/examples/models_billboard.c
index a58ec7d7..511d61ce 100644
--- a/examples/models_billboard.c
+++ b/examples/models_billboard.c
@@ -2,10 +2,10 @@
 *
 *   raylib [models] example - Drawing billboards
 *
-*   This example has been created using raylib 1.2 (www.raylib.com)
+*   This example has been created using raylib 1.3 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
-*   Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
+*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 
@@ -21,24 +21,24 @@ int main()
     InitWindow(screenWidth, screenHeight, "raylib [models] example - drawing billboards");
 
     // Define the camera to look into our 3d world
-    Camera camera = {{ 10.0, 8.0, 10.0 }, { 0.0, 0.0, 0.0 }, { 0.0, 1.0, 0.0 }};
+    Camera camera = {{ 5.0, 4.0, 5.0 }, { 0.0, 2.0, 0.0 }, { 0.0, 1.0, 0.0 }};
 
-    Texture2D lena = LoadTexture("resources/lena.png");     // Our texture for billboard
-    Rectangle eyesRec = { 225, 240, 155, 50 };              // Part of the texture to draw
-    Vector3 billPosition = { 0.0, 0.0, 0.0 };               // Position where draw billboard
+    Texture2D bill = LoadTexture("resources/billboard.png");     // Our texture billboard
+    Vector3 billPosition = { 0.0, 2.0, 0.0 };                   // Position where draw billboard
+    
+    SetCameraMode(CAMERA_ORBITAL);      // Set an orbital camera mode
+    SetCameraPosition(camera.position); // Set internal camera position to match our camera position
+    SetCameraTarget(camera.target);     // Set internal camera target to match our camera target
 
-    SetTargetFPS(60);   // Set our game to run at 60 frames-per-second
+    SetTargetFPS(60);                   // Set our game to run at 60 frames-per-second
     //--------------------------------------------------------------------------------------
 
     // Main game loop
-    while (!WindowShouldClose())    // Detect window close button or ESC key
+    while (!WindowShouldClose())        // Detect window close button or ESC key
     {
         // Update
         //----------------------------------------------------------------------------------
-        if (IsKeyDown(KEY_LEFT)) camera.position.x -= 0.2;
-        if (IsKeyDown(KEY_RIGHT)) camera.position.x += 0.2;
-        if (IsKeyDown(KEY_UP)) camera.position.y -= 0.2;
-        if (IsKeyDown(KEY_DOWN)) camera.position.y += 0.2;
+        camera = UpdateCamera(0);       // Update internal camera and our camera
         //----------------------------------------------------------------------------------
 
         // Draw
@@ -49,8 +49,7 @@ int main()
 
             Begin3dMode(camera);
 
-                //DrawBillboard(camera, lena, billPosition, 1.0, WHITE);
-                DrawBillboardRec(camera, lena, eyesRec, billPosition, 4.0, WHITE);
+                DrawBillboard(camera, bill, billPosition, 2.0f, WHITE);
 
                 DrawGrid(10.0, 1.0);        // Draw a grid
 
@@ -64,7 +63,7 @@ int main()
 
     // De-Initialization
     //--------------------------------------------------------------------------------------
-    UnloadTexture(lena);        // Unload texture
+    UnloadTexture(bill);        // Unload texture
 
     CloseWindow();              // Close window and OpenGL context
     //--------------------------------------------------------------------------------------
diff --git a/examples/models_billboard.png b/examples/models_billboard.png
new file mode 100644
index 00000000..f1ed9239
--- /dev/null
+++ b/examples/models_billboard.png
diff --git a/examples/models_cubicmap.c b/examples/models_cubicmap.c
index e1f2e7df..3b20907b 100644
--- a/examples/models_cubicmap.c
+++ b/examples/models_cubicmap.c
@@ -5,7 +5,7 @@
 *   This example has been created using raylib 1.3 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
-*   Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
+*   Copyright (c) 2015 Ramon Santamaria (Ray San - raysan@raysanweb.com)
 *
 ********************************************************************************************/
 
diff --git a/examples/models_heightmap.c b/examples/models_heightmap.c
index 297ada32..7de31a8e 100644
--- a/examples/models_heightmap.c
+++ b/examples/models_heightmap.c
@@ -5,7 +5,7 @@
 *   This example has been created using raylib 1.3 (www.raylib.com)
 *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
 *
-*   Copyright (c) 2014 Ramon Santamaria (@raysan5)
+*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 
diff --git a/examples/resources/billboard.png b/examples/resources/billboard.png
new file mode 100644
index 00000000..e2fe398d
--- /dev/null
+++ b/examples/resources/billboard.png
diff --git a/examples/resources/smoke.png b/examples/resources/smoke.png
new file mode 100644
index 00000000..7bad8c68
--- /dev/null
+++ b/examples/resources/smoke.png
diff --git a/examples/textures_particles_trail_blending.c b/examples/textures_particles_trail_blending.c
new file mode 100644
index 00000000..1e7abf7e
--- /dev/null
+++ b/examples/textures_particles_trail_blending.c
@@ -0,0 +1,132 @@
+/*******************************************************************************************
+*
+*   raylib example - particles trail blending
+*
+*   This example has been created using raylib 1.3 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#define MAX_PARTICLES 200
+
+typedef struct {
+    Vector2 position;
+    Color color;
+    float alpha;
+    float size;
+    float rotation;
+    bool active;        // NOTE: Use it to activate/deactive particle
+} Particle;
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [textures] example - particles trail blending");
+    
+    // Particles pool, reuse them!
+    Particle mouseTail[MAX_PARTICLES]; 
+    
+    // Initialize particles
+    for (int i = 0; i < MAX_PARTICLES; i++)
+    {
+        mouseTail[i].position = (Vector2){ 0, 0 };
+        mouseTail[i].color = (Color){ GetRandomValue(0, 255), GetRandomValue(0, 255), GetRandomValue(0, 255), 255 };
+        mouseTail[i].alpha = 1.0f;
+        mouseTail[i].size = (float)GetRandomValue(1, 30)/20;
+        mouseTail[i].rotation = GetRandomValue(0, 360);
+        mouseTail[i].active = false;
+    }
+    
+    float gravity = 3;
+
+    Texture2D smoke = LoadTexture("resources/smoke.png");
+    
+    int blending = BLEND_ALPHA;
+    
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        
+        // Activate one particle every frame and Update active particles
+        // NOTE: Particles initial position should be mouse position when activated
+        // NOTE: Particles fall down with gravity and rotation... and disappear after 2 seconds (alpha = 0)
+        // NOTE: When a particle disappears, active = false and it can be reused.
+        for (int i = 0; i < MAX_PARTICLES; i++)
+        {
+            if (!mouseTail[i].active)
+            {
+                mouseTail[i].active = true;
+                mouseTail[i].alpha = 1.0f;
+                mouseTail[i].position = GetMousePosition();
+                i = MAX_PARTICLES;
+            }
+        }
+
+        for (int i = 0; i < MAX_PARTICLES; i++)
+        {
+            if (mouseTail[i].active)
+            {
+                mouseTail[i].position.y += gravity;
+                mouseTail[i].alpha -= 0.01f;
+                
+                if (mouseTail[i].alpha <= 0.0f) mouseTail[i].active = false;
+                
+                mouseTail[i].rotation += 5;
+            }
+        }
+        
+        if (IsKeyPressed(KEY_SPACE))
+        {
+            if (blending == BLEND_ALPHA) blending = BLEND_ADDITIVE;
+            else blending = BLEND_ALPHA;
+        }
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(DARKGRAY);
+            
+            SetBlendMode(blending);
+
+            // Draw active particles
+            for (int i = 0; i < MAX_PARTICLES; i++)
+            {
+                if (mouseTail[i].active) DrawTexturePro(smoke, (Rectangle){ 0, 0, smoke.width, smoke.height }, 
+                                                       (Rectangle){ mouseTail[i].position.x, mouseTail[i].position.y, smoke.width*mouseTail[i].size, smoke.height*mouseTail[i].size },
+                                                       (Vector2){ smoke.width*mouseTail[i].size/2, smoke.height*mouseTail[i].size/2 }, mouseTail[i].rotation,
+                                                       Fade(mouseTail[i].color, mouseTail[i].alpha));
+            }
+            
+            DrawText("PRESS SPACE to CHANGE BLENDING MODE", 180, 20, 20, RAYWHITE);
+            
+            if (blending == BLEND_ALPHA) DrawText("ALPHA BLENDING", 290, screenHeight - 40, 20, RAYWHITE);
+            else DrawText("ADDITIVE BLENDING", 280, screenHeight - 40, 20, RAYWHITE);
+            
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadTexture(smoke);
+    
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
\ No newline at end of file
diff --git a/examples/textures_particles_trail_blending.png b/examples/textures_particles_trail_blending.png
new file mode 100644
index 00000000..b0c40fd2
--- /dev/null
+++ b/examples/textures_particles_trail_blending.png
diff --git a/examples/textures_to_image.c b/examples/textures_to_image.c
new file mode 100644
index 00000000..3ea8e017
--- /dev/null
+++ b/examples/textures_to_image.c
@@ -0,0 +1,68 @@
+/*******************************************************************************************
+*
+*   raylib [textures] example - Retrieve image data from texture: GetTextureData() 
+*
+*   NOTE: Images are loaded in CPU memory (RAM); textures are loaded in GPU memory (VRAM)
+*
+*   This example has been created using raylib 1.1 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2014 Ramon Santamaria (Ray San - raysan@raysanweb.com)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    int screenWidth = 800;
+    int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture to image");
+
+    // NOTE: Textures MUST be loaded after Window initialization (OpenGL context is required)
+
+    Image image = LoadImage("resources/raylib_logo.png");  // Load image data into CPU memory (RAM)
+    Texture2D texture = LoadTextureFromImage(image);       // Image converted to texture, GPU memory (RAM -> VRAM)
+    UnloadImage(image);                                    // Unload image data from CPU memory (RAM)
+    
+    image = GetTextureData(texture);                       // Retrieve image data from GPU memory (VRAM -> RAM)
+    UnloadTexture(texture);                                // Unload texture from GPU memory (VRAM)
+    
+    texture = LoadTextureFromImage(image);                 // Recreate texture from retrieved image data (RAM -> VRAM)
+    UnloadImage(image);                                    // Unload retrieved image data from CPU memory (RAM)
+    //---------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // TODO: Update your variables here
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            DrawTexture(texture, screenWidth/2 - texture.width/2, screenHeight/2 - texture.height/2, WHITE);
+
+            DrawText("this IS a texture loaded from an image!", 300, 370, 10, GRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadTexture(texture);       // Texture unloading
+
+    CloseWindow();                // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}
\ No newline at end of file
diff --git a/examples/textures_to_image.png b/examples/textures_to_image.png
new file mode 100644
index 00000000..410103a5
--- /dev/null
+++ b/examples/textures_to_image.png