From b8b34a1b26df0b9b8c39d21f22f11000044fe5da Mon Sep 17 00:00:00 2001 From: victorfisac Date: Sun, 3 Jan 2016 17:58:16 +0100 Subject: [PATCH] Added new physics example New physics example to see AddForceAtPosition() behaviour applied to 5 rigidbodies. --- examples/physics_rigidbody_force.c | 141 +++++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100644 examples/physics_rigidbody_force.c diff --git a/examples/physics_rigidbody_force.c b/examples/physics_rigidbody_force.c new file mode 100644 index 00000000..726e7c67 --- /dev/null +++ b/examples/physics_rigidbody_force.c @@ -0,0 +1,141 @@ +/******************************************************************************************* +* +* 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; +}