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/*******************************************************************************************
*
* Physac - Body shatter
*
* 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"
#if defined(PLATFORM_WEB)
#include <emscripten/emscripten.h>
#endif
//----------------------------------------------------------------------------------
// Global Variables Definition
//----------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;
// Physac logo drawing position
int logoX = 0;
int logoY = 15;
PhysicsBody body;
//----------------------------------------------------------------------------------
// Module Functions Declaration
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void); // Update and Draw one frame
//----------------------------------------------------------------------------------
// Main Enry Point
//----------------------------------------------------------------------------------
int main()
{
// Initialization
//--------------------------------------------------------------------------------------
SetConfigFlags(FLAG_MSAA_4X_HINT);
InitWindow(screenWidth, screenHeight, "Physac [raylib] - Body shatter");
// Physac logo drawing position
logoX = screenWidth - MeasureText("Physac", 30) - 10;
// Initialize physics and default physics bodies
InitPhysics();
SetPhysicsGravity(0, 0);
// Create random polygon physics body to shatter
body = CreatePhysicsBodyPolygon((Vector2){ screenWidth/2, screenHeight/2 }, GetRandomValue(80, 200), GetRandomValue(3, 8), 10);
#if defined(PLATFORM_WEB)
emscripten_set_main_loop(UpdateDrawFrame, 0, 1);
#else
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
UpdateDrawFrame();
}
#endif
// De-Initialization
//--------------------------------------------------------------------------------------
ClosePhysics(); // Uninitialize physics
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}
//----------------------------------------------------------------------------------
// Module Functions Definition
//----------------------------------------------------------------------------------
void UpdateDrawFrame(void)
{
// 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();
//----------------------------------------------------------------------------------
}
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