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Added new physics example

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New physics example to see AddForceAtPosition() behaviour applied to 5
rigidbodies.
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victorfisac 2016-01-03 17:58:16 +01:00
parent 6608c5a8a7
commit b8b34a1b26
1 changed files with 141 additions and 0 deletions
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examples/physics_rigidbody_force.c Normal file
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/*******************************************************************************************
*
* raylib [physac] physics example - Rigidbody forces
*
* 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)
*
********************************************************************************************/
#include "raylib.h"
#define MAX_OBJECTS 5
#define OBJECTS_OFFSET 150
#define FORCE_INTENSITY 250.0f // Customize by user
#define FORCE_RADIUS 100 // Customize by user
int main()
{
// Initialization
//--------------------------------------------------------------------------------------
int screenWidth = 800;
int screenHeight = 450;
InitWindow(screenWidth, screenHeight, "raylib [physics] example - rigidbodies forces");
SetTargetFPS(60); // Enable v-sync
InitPhysics(); // Initialize internal physics values (max rigidbodies/colliders available: 1024)
// Physics initialization
Physics worldPhysics = {true, false, (Vector2){0, -9.81f}};
// Set internal physics settings
SetPhysics(worldPhysics);
// Objects initialization
Transform objects[MAX_OBJECTS];
for(int i = 0; i < MAX_OBJECTS; i++)
{
objects[i] = (Transform){(Vector2){75 + OBJECTS_OFFSET * i, (screenHeight - 50) / 2}, 0.0f, (Vector2){50, 50}};
AddCollider(i, (Collider){true, RectangleCollider, (Rectangle){objects[i].position.x, objects[i].position.y, objects[i].scale.x, objects[i].scale.y}, 0});
AddRigidbody(i, (Rigidbody){true, 1.0f, (Vector2){0, 0}, (Vector2){0, 0}, false, false, true, 0.5f, 0.5f});
}
// Floor initialization
// NOTE: floor doesn't need a rigidbody because it's a static physic object, just a collider to collide with other dynamic colliders (with rigidbody)
Transform floor = (Transform){(Vector2){0, screenHeight * 0.8f}, 0.0f, (Vector2){screenWidth, screenHeight * 0.2f}};
AddCollider(MAX_OBJECTS, (Collider){true, RectangleCollider, (Rectangle){floor.position.x, floor.position.y, floor.scale.x, floor.scale.y}, 0});
//--------------------------------------------------------------------------------------
// Main game loop
while (!WindowShouldClose()) // Detect window close button or ESC key
{
// Update
//----------------------------------------------------------------------------------
// Update object physics
// NOTE: all physics detections and reactions are calculated in ApplyPhysics() function (You will live happier :D)
for(int i = 0; i < MAX_OBJECTS; i++)
{
ApplyPhysics(i, &objects[i].position);
}
// Check foce button input
if(IsMouseButtonPressed(MOUSE_LEFT_BUTTON))
{
AddForceAtPosition(GetMousePosition(), FORCE_INTENSITY, FORCE_RADIUS);
}
// Check debug mode toggle button input
if(IsKeyPressed(KEY_P))
{
// Update program physics value
worldPhysics.debug = !worldPhysics.debug;
// Update internal physics value
SetPhysics(worldPhysics);
}
//----------------------------------------------------------------------------------
// Draw
//----------------------------------------------------------------------------------
BeginDrawing();
ClearBackground(RAYWHITE);
// Check if debug mode is enabled
if(worldPhysics.debug)
{
// Draw every internal physics stored collider if it is active (floor included)
for(int i = 0; i < MAX_OBJECTS + 1; i++)
{
if(GetCollider(i).enabled)
{
// Draw collider bounds
DrawRectangleLines(GetCollider(i).bounds.x, GetCollider(i).bounds.y, GetCollider(i).bounds.width, GetCollider(i).bounds.height, GREEN);
// Check if current collider is not floor
if(i < MAX_OBJECTS)
{
// Draw lines between mouse position and objects if they are in force range
if(CheckCollisionPointCircle(GetMousePosition(), (Vector2){GetCollider(i).bounds.x + GetCollider(i).bounds.width / 2, GetCollider(i).bounds.y + GetCollider(i).bounds.height / 2}, FORCE_RADIUS))
{
DrawLineV(GetMousePosition(), (Vector2){GetCollider(i).bounds.x + GetCollider(i).bounds.width / 2, GetCollider(i).bounds.y + GetCollider(i).bounds.height / 2}, RED);
}
}
}
}
// Draw radius circle
DrawCircleLines(GetMousePosition().x, GetMousePosition().y, FORCE_RADIUS, RED);
}
else
{
// Draw objects
for(int i = 0; i < MAX_OBJECTS; i++)
{
DrawRectangleRec((Rectangle){objects[i].position.x, objects[i].position.y, objects[i].scale.x, objects[i].scale.y}, GRAY);
}
// Draw floor
DrawRectangleRec((Rectangle){floor.position.x, floor.position.y, floor.scale.x, floor.scale.y}, BLACK);
}
// Draw help messages
DrawText("Use LEFT MOUSE BUTTON to create a force in mouse position", (screenWidth - MeasureText("Use LEFT MOUSE BUTTON to create a force in mouse position", 20)) / 2, screenHeight * 0.20f, 20, LIGHTGRAY);
DrawText("Use P to switch DEBUG MODE", (screenWidth - MeasureText("Use P to switch DEBUG MODE", 20)) / 2, screenHeight * 0.3f, 20, LIGHTGRAY);
EndDrawing();
//----------------------------------------------------------------------------------
}
// De-Initialization
//--------------------------------------------------------------------------------------
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------
return 0;
}