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/*******************************************************************************************
*
* Physac - Physics movement
*
* NOTE 1: Physac requires multi-threading, when InitPhysics() a second thread is created to manage physics calculations.
* NOTE 2: Physac requires static C library linkage to avoid dependency on MinGW DLL (-static -lpthread)
*
* Use the following line to compile:
*
* gcc -o $(NAME_PART).exe $(FILE_NAME) -s $(RAYLIB_DIR)\raylib\raylib_icon -static -lraylib -lpthread
* -lglfw3 -lopengl32 -lgdi32 -lopenal32 -lwinmm -std=c99 -Wl,--subsystem,windows -Wl,-allow-multiple-definition
*
* Copyright (c) 2017 Victor Fisac
*
********************************************************************************************/
#include "raylib.h"
#define PHYSAC_IMPLEMENTATION
#include "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(); // Uninitialize physics
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
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