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144 righe
6.3 KiB
144 righe
6.3 KiB
/*******************************************************************************************
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*
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* raylib [physics] example - Basic rigidbody
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*
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* Welcome to raylib!
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*
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* To test examples, just press F6 and execute raylib_compile_execute script
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* Note that compiled executable is placed in the same folder as .c file
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*
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* You can find all basic examples on C:\raylib\raylib\examples folder or
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* raylib official webpage: www.raylib.com
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*
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* Enjoy using raylib. :)
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*
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* This example has been created using raylib 1.3 (www.raylib.com)
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* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
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*
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* Copyright (c) 2015 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include "raylib.h"
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#define OBJECT_SIZE 50
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#define PLAYER_INDEX 0
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int main()
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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int screenWidth = 800;
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int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [physics] example - basic rigidbody");
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SetTargetFPS(60); // Enable v-sync
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InitPhysics(); // Initialize internal physics values (max rigidbodies/colliders available: 1024)
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// Physics initialization
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Physics worldPhysics = {true, false, (Vector2){0, -9.81f}};
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// Set internal physics settings
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SetPhysics(worldPhysics);
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// Object initialization
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Transform player = (Transform){(Vector2){(screenWidth - OBJECT_SIZE) / 2, (screenHeight - OBJECT_SIZE) / 2}, 0.0f, (Vector2){OBJECT_SIZE, OBJECT_SIZE}};
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AddCollider(PLAYER_INDEX, (Collider){true, RectangleCollider, (Rectangle){player.position.x, player.position.y, player.scale.x, player.scale.y}, 0});
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AddRigidbody(PLAYER_INDEX, (Rigidbody){true, 1.0f, (Vector2){0, 0}, (Vector2){0, 0}, false, false, true, 0.5f, 1.0f});
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// Floor initialization
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// 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)
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Transform floor = (Transform){(Vector2){0, screenHeight * 0.8f}, 0.0f, (Vector2){screenWidth, screenHeight * 0.2f}};
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AddCollider(PLAYER_INDEX + 1, (Collider){true, RectangleCollider, (Rectangle){floor.position.x, floor.position.y, floor.scale.x, floor.scale.y}, 0});
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// Object properties initialization
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float moveSpeed = 6.0f;
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float jumpForce = 4.5f;
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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// Update object physics
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// NOTE: all physics detections and reactions are calculated in ApplyPhysics() function (You will live happier :D)
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ApplyPhysics(PLAYER_INDEX, &player.position);
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// Check jump button input
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if(IsKeyDown(KEY_SPACE) && GetRigidbody(PLAYER_INDEX).isGrounded)
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{
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// Reset object Y velocity to avoid double jumping cases but keep the same X velocity that it already has
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SetRigidbodyVelocity(PLAYER_INDEX, (Vector2){GetRigidbody(PLAYER_INDEX).velocity.x, 0});
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// Add jumping force in Y axis
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AddRigidbodyForce(PLAYER_INDEX, (Vector2){0, jumpForce});
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}
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// Check movement buttons input
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if(IsKeyDown(KEY_RIGHT) || IsKeyDown(KEY_D))
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{
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// Set rigidbody velocity in X based on moveSpeed value and apply the same Y velocity that it already has
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SetRigidbodyVelocity(PLAYER_INDEX, (Vector2){moveSpeed, GetRigidbody(PLAYER_INDEX).velocity.y});
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}
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else if(IsKeyDown(KEY_LEFT) || IsKeyDown(KEY_A))
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{
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// Set rigidbody velocity in X based on moveSpeed negative value and apply the same Y velocity that it already has
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SetRigidbodyVelocity(PLAYER_INDEX, (Vector2){-moveSpeed, GetRigidbody(PLAYER_INDEX).velocity.y});
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}
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// Check debug mode toggle button input
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if(IsKeyPressed(KEY_P))
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{
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// Update program physics value
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worldPhysics.debug = !worldPhysics.debug;
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// Update internal physics value
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SetPhysics(worldPhysics);
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}
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(RAYWHITE);
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// Draw information
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DrawText("Use LEFT / RIGHT to MOVE and SPACE to JUMP", (screenWidth - MeasureText("Use LEFT / RIGHT to MOVE and SPACE to JUMP", 20)) / 2, screenHeight * 0.20f, 20, LIGHTGRAY);
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DrawText("Use P to switch DEBUG MODE", (screenWidth - MeasureText("Use P to switch DEBUG MODE", 20)) / 2, screenHeight * 0.3f, 20, LIGHTGRAY);
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// Check if debug mode is enabled
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if(worldPhysics.debug)
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{
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// Draw every internal physics stored collider if it is active
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for(int i = 0; i < 2; i++)
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{
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if(GetCollider(i).enabled)
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{
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DrawRectangleLines(GetCollider(i).bounds.x, GetCollider(i).bounds.y, GetCollider(i).bounds.width, GetCollider(i).bounds.height, GREEN);
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}
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}
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}
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else
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{
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// Draw player
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DrawRectangleRec((Rectangle){player.position.x, player.position.y, player.scale.x, player.scale.y}, GRAY);
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// Draw floor
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DrawRectangleRec((Rectangle){floor.position.x, floor.position.y, floor.scale.x, floor.scale.y}, BLACK);
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}
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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// De-Initialization
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//--------------------------------------------------------------------------------------
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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}
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