141 lines
4.9 KiB
C
141 lines
4.9 KiB
C
/*******************************************************************************************
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*
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* raylib [shapes] example - easings box anim
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*
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* Example originally created with raylib 2.5, last time updated with raylib 2.5
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2014-2023 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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#include "raylib.h"
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#include "reasings.h" // Required for easing functions
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//------------------------------------------------------------------------------------
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// Program main entry point
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//------------------------------------------------------------------------------------
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int main(void)
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 450;
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InitWindow(screenWidth, screenHeight, "raylib [shapes] example - easings box anim");
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// Box variables to be animated with easings
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Rectangle rec = { GetScreenWidth()/2.0f, -100, 100, 100 };
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float rotation = 0.0f;
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float alpha = 1.0f;
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int state = 0;
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int framesCounter = 0;
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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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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switch (state)
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{
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case 0: // Move box down to center of screen
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{
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framesCounter++;
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// NOTE: Remember that 3rd parameter of easing function refers to
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// desired value variation, do not confuse it with expected final value!
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rec.y = EaseElasticOut((float)framesCounter, -100, GetScreenHeight()/2.0f + 100, 120);
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if (framesCounter >= 120)
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{
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framesCounter = 0;
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state = 1;
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}
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} break;
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case 1: // Scale box to an horizontal bar
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{
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framesCounter++;
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rec.height = EaseBounceOut((float)framesCounter, 100, -90, 120);
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rec.width = EaseBounceOut((float)framesCounter, 100, (float)GetScreenWidth(), 120);
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if (framesCounter >= 120)
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{
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framesCounter = 0;
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state = 2;
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}
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} break;
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case 2: // Rotate horizontal bar rectangle
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{
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framesCounter++;
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rotation = EaseQuadOut((float)framesCounter, 0.0f, 270.0f, 240);
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if (framesCounter >= 240)
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{
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framesCounter = 0;
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state = 3;
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}
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} break;
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case 3: // Increase bar size to fill all screen
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{
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framesCounter++;
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rec.height = EaseCircOut((float)framesCounter, 10, (float)GetScreenWidth(), 120);
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if (framesCounter >= 120)
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{
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framesCounter = 0;
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state = 4;
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}
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} break;
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case 4: // Fade out animation
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{
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framesCounter++;
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alpha = EaseSineOut((float)framesCounter, 1.0f, -1.0f, 160);
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if (framesCounter >= 160)
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{
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framesCounter = 0;
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state = 5;
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}
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} break;
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default: break;
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}
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// Reset animation at any moment
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if (IsKeyPressed(KEY_SPACE))
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{
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rec = (Rectangle){ GetScreenWidth()/2.0f, -100, 100, 100 };
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rotation = 0.0f;
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alpha = 1.0f;
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state = 0;
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framesCounter = 0;
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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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DrawRectanglePro(rec, (Vector2){ rec.width/2, rec.height/2 }, rotation, Fade(BLACK, alpha));
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DrawText("PRESS [SPACE] TO RESET BOX ANIMATION!", 10, GetScreenHeight() - 25, 20, LIGHTGRAY);
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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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} |