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Diffstat (limited to 'examples/src/shapes/shapes_easings_ball_anim.c')
| -rw-r--r-- | examples/src/shapes/shapes_easings_ball_anim.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/examples/src/shapes/shapes_easings_ball_anim.c b/examples/src/shapes/shapes_easings_ball_anim.c new file mode 100644 index 0000000..4477203 --- /dev/null +++ b/examples/src/shapes/shapes_easings_ball_anim.c @@ -0,0 +1,110 @@ +/******************************************************************************************* +* +* raylib [shapes] example - easings ball anim +* +* This example has been created using raylib 2.5 (www.raylib.com) +* raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details) +* +* Copyright (c) 2014-2019 Ramon Santamaria (@raysan5) +* +********************************************************************************************/ + +#include "raylib.h" + +#include "easings.h" // Required for easing functions + +int main() +{ + // Initialization + //-------------------------------------------------------------------------------------- + const int screenWidth = 800; + const int screenHeight = 450; + + InitWindow(screenWidth, screenHeight, "raylib [shapes] example - easings ball anim"); + + // Ball variable value to be animated with easings + int ballPositionX = -100; + int ballRadius = 20; + float ballAlpha = 0.0f; + + int state = 0; + int framesCounter = 0; + + SetTargetFPS(60); + //-------------------------------------------------------------------------------------- + + // Main game loop + while (!WindowShouldClose()) // Detect window close button or ESC key + { + // Update + //---------------------------------------------------------------------------------- + if (state == 0) // Move ball position X with easing + { + framesCounter++; + ballPositionX = EaseElasticOut(framesCounter, -100, screenWidth/2 + 100, 120); + + if (framesCounter >= 120) + { + framesCounter = 0; + state = 1; + } + } + else if (state == 1) // Increase ball radius with easing + { + framesCounter++; + ballRadius = EaseElasticIn(framesCounter, 20, 500, 200); + + if (framesCounter >= 200) + { + framesCounter = 0; + state = 2; + } + } + else if (state == 2) // Change ball alpha with easing (background color blending) + { + framesCounter++; + ballAlpha = EaseCubicOut(framesCounter, 0.0f, 1.0f, 200); + + if (framesCounter >= 200) + { + framesCounter = 0; + state = 3; + } + } + else if (state == 3) // Reset state to play again + { + if (IsKeyPressed(KEY_ENTER)) + { + // Reset required variables to play again + ballPositionX = -100; + ballRadius = 20; + ballAlpha = 0.0f; + state = 0; + } + } + + if (IsKeyPressed(KEY_R)) framesCounter = 0; + //---------------------------------------------------------------------------------- + + // Draw + //---------------------------------------------------------------------------------- + BeginDrawing(); + + ClearBackground(RAYWHITE); + + if (state >= 2) DrawRectangle(0, 0, screenWidth, screenHeight, GREEN); + DrawCircle(ballPositionX, 200, ballRadius, Fade(RED, 1.0f - ballAlpha)); + + if (state == 3) DrawText("PRESS [ENTER] TO PLAY AGAIN!", 240, 200, 20, BLACK); + + EndDrawing(); + //---------------------------------------------------------------------------------- + } + + // De-Initialization + //-------------------------------------------------------------------------------------- + CloseWindow(); // Close window and OpenGL context + //-------------------------------------------------------------------------------------- + + return 0; +}
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