WARNING: Removed `physac` from raylib sources/examples

`physac` is available on its own repo
3 years ago · 8da566d6e7
--- a/examples/Makefile
+++ b/examples/Makefile
@ -494,20 +494,12 @@ AUDIO = \
    audio/audio_sound_loading \
    audio/audio_multichannel_sound
 PHYSICS = \
    physics/physics_demo \
    physics/physics_friction \
    physics/physics_movement \
    physics/physics_restitution \
    physics/physics_shatter
 CURRENT_MAKEFILE = $(lastword $(MAKEFILE_LIST))
 # Define processes to execute
 #------------------------------------------------------------------------------------------------
 # Default target entry
 all: $(CORE) $(SHAPES) $(TEXT) $(TEXTURES) $(MODELS) $(SHADERS) $(AUDIO) $(PHYSICS)
 all: $(CORE) $(SHAPES) $(TEXT) $(TEXTURES) $(MODELS) $(SHADERS) $(AUDIO)
 core: $(CORE)
 shapes: $(SHAPES)
@ -516,7 +508,6 @@ text: $(TEXT)
 models: $(MODELS)
 shaders: $(SHADERS)
 audio: $(AUDIO)
 physics: $(PHYSICS)
 # Generic compilation pattern
 # NOTE: Examples must be ready for Android compilation!
--- a/examples/Makefile.Web
+++ b/examples/Makefile.Web
@ -238,7 +238,7 @@ ifeq ($(PLATFORM),PLATFORM_DRM)
 endif
 # Define include paths for required headers
 # NOTE: Some external/extras libraries could be required (stb, physac, easings...)
 # NOTE: Some external/extras libraries could be required (stb, easings...)
 INCLUDE_PATHS = -I. -I$(RAYLIB_PATH)/src -I$(RAYLIB_PATH)/src/external -I$(RAYLIB_PATH)/src/extras
 # Define additional directories containing required header files
@ -324,8 +324,6 @@ ifeq ($(PLATFORM),PLATFORM_DESKTOP)
        # Libraries for Windows desktop compilation
        # NOTE: WinMM library required to set high-res timer resolution
        LDLIBS = -lraylib -lopengl32 -lgdi32 -lwinmm
        # Required for physac examples
        LDLIBS += -static -lpthread
    endif
    ifeq ($(PLATFORM_OS),LINUX)
        # Libraries for Debian GNU/Linux desktop compiling
@ -508,17 +506,10 @@ AUDIO = \
    audio/audio_sound_loading \
    audio/audio_multichannel_sound
 PHYSICS = \
    physics/physics_demo \
    physics/physics_friction \
    physics/physics_movement \
    physics/physics_restitution \
    physics/physics_shatter
 CURRENT_MAKEFILE = $(lastword $(MAKEFILE_LIST))
 # Default target entry
 all: $(CORE) $(SHAPES) $(TEXT) $(TEXTURES) $(MODELS) $(SHADERS) $(AUDIO) $(PHYSICS)
 all: $(CORE) $(SHAPES) $(TEXT) $(TEXTURES) $(MODELS) $(SHADERS) $(AUDIO)
 core: $(CORE)
 shapes: $(SHAPES)
@ -527,7 +518,6 @@ text: $(TEXT)
 models: $(MODELS)
 shaders: $(SHADERS)
 audio: $(AUDIO)
 physics: $(PHYSICS)
 # Compile CORE examples
 core/core_basic_window: core/core_basic_window.c
@ -1007,23 +997,6 @@ audio/audio_multichannel_sound: audio/audio_multichannel_sound.c
    --preload-file audio/resources/sound.wav@resources/sound.wav \
    --preload-file audio/resources/target.ogg@resources/target.ogg
 # Compile PHYSICS examples
 physics/physics_demo: physics/physics_demo.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) -DPHYSAC_AVOID_TIMMING_SYSTEM
 physics/physics_friction: physics/physics_friction.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) -DPHYSAC_AVOID_TIMMING_SYSTEM
 physics/physics_movement: physics/physics_movement.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) -DPHYSAC_AVOID_TIMMING_SYSTEM
 physics/physics_restitution: physics/physics_restitution.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) -DPHYSAC_AVOID_TIMMING_SYSTEM
 physics/physics_shatter: physics/physics_shatter.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM) -DPHYSAC_AVOID_TIMMING_SYSTEM
 # Clean everything
 clean:
 ifeq ($(PLATFORM),PLATFORM_DESKTOP)
--- a/examples/README.md
+++ b/examples/README.md
@ -176,18 +176,6 @@ Examples using raylib audio functionality, including sound/music loading and pla
 | 105 | [audio_sound_loading](audio/audio_sound_loading.c)           | <img src="audio/audio_sound_loading.png" alt="audio_sound_loading" width="200">           | ray                                          |        |
 | 106 | [audio_multichannel_sound](audio/audio_multichannel_sound.c) | <img src="audio/audio_multichannel_sound.png" alt="audio_multichannel_sound" width="200"> | [Chris Camacho](https://github.com/codifies) | ⭐️     |
 ### category: physics
 Examples showing physics functionality with raylib. This functionality is provided by [physac](https://github.com/victorfisac/Physac) library, included with raylib [sources](../src/physac.h). Note this library is not linked with raylib by default, it should be manually included in user code.
 | ## | example  | image  | developer  | new |
 |----|----------|--------|:----------:|:---:|
 | 107 | [physics_demo](physics/physics_demo.c)               | <img src="physics/physics_demo.png" alt="physics_demo" width="200">               | [Victor Fisac](https://github.com/victorfisac) |        |
 | 108 | [physics_friction](physics/physics_friction.c)       | <img src="physics/physics_friction.png" alt="physics_friction" width="200">       | [Victor Fisac](https://github.com/victorfisac) |        |
 | 109 | [physics_movement](physics/physics_movement.c)       | <img src="physics/physics_movement.png" alt="physics_movement" width="200">       | [Victor Fisac](https://github.com/victorfisac) |        |
 | 110 | [physics_restitution](physics/physics_restitution.c) | <img src="physics/physics_restitution.png" alt="physics_restitution" width="200"> | [Victor Fisac](https://github.com/victorfisac) |        |
 | 111 | [physics_shatter](physics/physics_shatter.c)         | <img src="physics/physics_shatter.png" alt="physics_shatter" width="200">         | [Victor Fisac](https://github.com/victorfisac) |        |
 ### category: others
 Examples showing raylib misc functionality that does not fit in other categories, like standalone modules usage or examples integrating external libraries.
--- a/examples/physics/physics_demo.c
+++ b/examples/physics/physics_demo.c
@ -1,128 +0,0 @@
 /*******************************************************************************************
 *
 *   raylib [physac] example - physics demo
 *
 *   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)
 *
 *   This example uses physac 1.1 (https://github.com/raysan5/raylib/blob/master/src/physac.h)
 *
 *   Copyright (c) 2016-2021 Victor Fisac (@victorfisac) and Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 #include "raylib.h"
 #define PHYSAC_IMPLEMENTATION
 #include "extras/physac.h"
 int main(void)
 {
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;
    SetConfigFlags(FLAG_MSAA_4X_HINT);
    InitWindow(screenWidth, screenHeight, "raylib [physac] example - physics demo");
    // 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/2.0f, (float)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/2.0f, screenHeight/2.0f }, 45, 10);
    circle->enabled = false;        // Disable body state to convert it to static (no dynamics, but collisions)
    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------
    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        UpdatePhysics();            // Update physics system
        if (IsKeyPressed(KEY_R))    // Reset physics system
        {
            ResetPhysics();
            floor = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2.0f, (float)screenHeight }, 500, 100, 10);
            floor->enabled = false;
            circle = CreatePhysicsBodyCircle((Vector2){ screenWidth/2.0f, screenHeight/2.0f }, 45, 10);
            circle->enabled = false;
        }
        // Physics body creation inputs
        if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) CreatePhysicsBodyPolygon(GetMousePosition(), (float)GetRandomValue(20, 80), GetRandomValue(3, 8), 10);
        else if (IsMouseButtonPressed(MOUSE_BUTTON_RIGHT)) CreatePhysicsBodyCircle(GetMousePosition(), (float)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;
 }
--- a/examples/physics/physics_demo.png
+++ b/examples/physics/physics_demo.png
--- a/examples/physics/physics_friction.c
+++ b/examples/physics/physics_friction.c
@ -1,142 +0,0 @@
 /*******************************************************************************************
 *
 *   raylib [physac] example - physics friction
 *
 *   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)
 *
 *   This example uses physac 1.1 (https://github.com/raysan5/raylib/blob/master/src/physac.h)
 *
 *   Copyright (c) 2016-2021 Victor Fisac (@victorfisac) and Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 #include "raylib.h"
 #define PHYSAC_IMPLEMENTATION
 #include "extras/physac.h"
 int main(void)
 {
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;
    SetConfigFlags(FLAG_MSAA_4X_HINT);
    InitWindow(screenWidth, screenHeight, "raylib [physac] example - physics friction");
    // 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/2.0f, (float)screenHeight }, (float)screenWidth, 100, 10);
    floor->enabled = false; // Disable body state to convert it to static (no dynamics, but collisions)
    PhysicsBody wall = CreatePhysicsBodyRectangle((Vector2){ screenWidth/2.0f, 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, (float)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){ (float)screenWidth - 25, (float)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){ (float)screenWidth - 35, (float)screenHeight*0.6f }, 40, 40, 10);
    bodyB->staticFriction = 1.0f;
    bodyB->dynamicFriction = 1.0f;
    SetPhysicsBodyRotation(bodyB, 330*DEG2RAD);
    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------
    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        UpdatePhysics();            // Update physics system
        if (IsKeyPressed(KEY_R))    // Reset physics system
        {
            // 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){ (float)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))/2.0f, 75, 30, WHITE);
            DrawText("0.1", (int)bodyA->position.x - MeasureText("0.1", 20)/2, (int)bodyA->position.y - 7, 20, WHITE);
            DrawText("1", (int)bodyB->position.x - MeasureText("1", 20)/2, (int)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;
 }
--- a/examples/physics/physics_friction.png
+++ b/examples/physics/physics_friction.png
--- a/examples/physics/physics_movement.c
+++ b/examples/physics/physics_movement.c
@ -1,128 +0,0 @@
 /*******************************************************************************************
 *
 *   raylib [physac] example - physics movement
 *
 *   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)
 *
 *   This example uses physac 1.1 (https://github.com/raysan5/raylib/blob/master/src/physac.h)
 *
 *   Copyright (c) 2016-2021 Victor Fisac (@victorfisac) and Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 #include "raylib.h"
 #define PHYSAC_IMPLEMENTATION
 #include "extras/physac.h"
 #define VELOCITY    0.5f
 int main(void)
 {
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;
    SetConfigFlags(FLAG_MSAA_4X_HINT);
    InitWindow(screenWidth, screenHeight, "raylib [physac] example - physics movement");
    // 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/2.0f, (float)screenHeight }, (float)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/2.0f }, 10, (float)screenHeight, 10);
    PhysicsBody wallRight = CreatePhysicsBodyRectangle((Vector2){ (float)screenWidth + 5, screenHeight/2.0f }, 10, (float)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/2.0f, screenHeight/2.0f }, 50, 50, 1);
    body->freezeOrient = true;      // Constrain body rotation to avoid little collision torque amounts
    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------
    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        UpdatePhysics();              // Update physics system
        if (IsKeyPressed(KEY_R))      // Reset physics input
        {
            // Reset movement physics body position, velocity and rotation
            body->position = (Vector2){ screenWidth/2.0f, screenHeight/2.0f };
            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;
 }
--- a/examples/physics/physics_movement.png
+++ b/examples/physics/physics_movement.png
--- a/examples/physics/physics_restitution.c
+++ b/examples/physics/physics_restitution.c
@ -1,129 +0,0 @@
 /*******************************************************************************************
 *
 *   raylib [physac] example - physics restitution
 *
 *   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)
 *
 *   This example uses physac 1.1 (https://github.com/raysan5/raylib/blob/master/src/physac.h)
 *
 *   Copyright (c) 2016-2021 Victor Fisac (@victorfisac) and Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 #include "raylib.h"
 #define PHYSAC_IMPLEMENTATION
 #include "extras/physac.h"
 int main(void)
 {
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;
    SetConfigFlags(FLAG_MSAA_4X_HINT);
    InitWindow(screenWidth, screenHeight, "raylib [physac] example - physics restitution");
    // 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/2.0f, (float)screenHeight }, (float)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/2.0f }, 30, 10);
    circleA->restitution = 0;
    PhysicsBody circleB = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.5f, screenHeight/2.0f }, 30, 10);
    circleB->restitution = 0.5f;
    PhysicsBody circleC = CreatePhysicsBodyCircle((Vector2){ screenWidth*0.75f, screenHeight/2.0f }, 30, 10);
    circleC->restitution = 1;
    // Restitution demo needs a very tiny physics time step for a proper simulation
    SetPhysicsTimeStep(1.0/60.0/100*1000);
    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------
    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        // Update
        //----------------------------------------------------------------------------------
        UpdatePhysics();            // Update physics system
        if (IsKeyPressed(KEY_R))    // Reset physics input
        {
            // Reset circles physics bodies position and velocity
            circleA->position = (Vector2){ screenWidth*0.25f, screenHeight/2.0f };
            circleA->velocity = (Vector2){ 0, 0 };
            circleB->position = (Vector2){ screenWidth*0.5f, screenHeight/2.0f };
            circleB->velocity = (Vector2){ 0, 0 };
            circleC->position = (Vector2){ screenWidth*0.75f, screenHeight/2.0f };
            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", (int)circleA->position.x - MeasureText("0", 20)/2, circleA->position.y - 7, 20, WHITE);
            DrawText("0.5", (int)circleB->position.x - MeasureText("0.5", 20)/2, circleB->position.y - 7, 20, WHITE);
            DrawText("1", (int)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
    //--------------------------------------------------------------------------------------
    DestroyPhysicsBody(circleA);
    DestroyPhysicsBody(circleB);
    DestroyPhysicsBody(circleC);
    DestroyPhysicsBody(floor);
    ClosePhysics();       // Unitialize physics
    CloseWindow();        // Close window and OpenGL context
    //--------------------------------------------------------------------------------------
    return 0;
 }
--- a/examples/physics/physics_restitution.png
+++ b/examples/physics/physics_restitution.png
--- a/examples/physics/physics_shatter.c
+++ b/examples/physics/physics_shatter.c
@ -1,111 +0,0 @@
 /*******************************************************************************************
 *
 *   raylib [physac] example - physics shatter
 *
 *   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)
 *
 *   This example uses physac 1.1 (https://github.com/raysan5/raylib/blob/master/src/physac.h)
 *
 *   Copyright (c) 2016-2021 Victor Fisac (@victorfisac) and Ramon Santamaria (@raysan5)
 *
 ********************************************************************************************/
 #include "raylib.h"
 #define PHYSAC_IMPLEMENTATION
 #include "extras/physac.h"
 int main(void)
 {
    // Initialization
    //--------------------------------------------------------------------------------------
    const int screenWidth = 800;
    const int screenHeight = 450;
    SetConfigFlags(FLAG_MSAA_4X_HINT);
    InitWindow(screenWidth, screenHeight, "raylib [physac] example - physics shatter");
    // 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
    CreatePhysicsBodyPolygon((Vector2){ screenWidth/2.0f, screenHeight/2.0f }, (float)GetRandomValue(80, 200), GetRandomValue(3, 8), 10);
    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
    //--------------------------------------------------------------------------------------
    // Main game loop
    while (!WindowShouldClose())    // Detect window close button or ESC key
    {
        //----------------------------------------------------------------------------------
        UpdatePhysics();            // Update physics system
        if (IsKeyPressed(KEY_R))    // Reset physics input
        {
            ResetPhysics();
            CreatePhysicsBodyPolygon((Vector2){ screenWidth/2.0f, screenHeight/2.0f }, (float)GetRandomValue(80, 200), GetRandomValue(3, 8), 10);
        }
        if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT))    // Physics shatter input
        {
            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;
 }
--- a/examples/physics/physics_shatter.png
+++ b/examples/physics/physics_shatter.png
--- a/src/extras/physac.h
+++ b/src/extras/physac.h