115 lines
4.0 KiB
C
115 lines
4.0 KiB
C
/*******************************************************************************************
|
|
*
|
|
* raylib [shapes] example - easings ball anim
|
|
*
|
|
* Example originally created with raylib 2.5, last time updated with raylib 2.5
|
|
*
|
|
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
|
|
* BSD-like license that allows static linking with closed source software
|
|
*
|
|
* Copyright (c) 2014-2023 Ramon Santamaria (@raysan5)
|
|
*
|
|
********************************************************************************************/
|
|
|
|
#include "raylib.h"
|
|
|
|
#include "reasings.h" // Required for easing functions
|
|
|
|
//------------------------------------------------------------------------------------
|
|
// Program main entry point
|
|
//------------------------------------------------------------------------------------
|
|
int main(void)
|
|
{
|
|
// 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); // Set our game to run at 60 frames-per-second
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
// Main game loop
|
|
while (!WindowShouldClose()) // Detect window close button or ESC key
|
|
{
|
|
// Update
|
|
//----------------------------------------------------------------------------------
|
|
if (state == 0) // Move ball position X with easing
|
|
{
|
|
framesCounter++;
|
|
ballPositionX = (int)EaseElasticOut((float)framesCounter, -100, screenWidth/2.0f + 100, 120);
|
|
|
|
if (framesCounter >= 120)
|
|
{
|
|
framesCounter = 0;
|
|
state = 1;
|
|
}
|
|
}
|
|
else if (state == 1) // Increase ball radius with easing
|
|
{
|
|
framesCounter++;
|
|
ballRadius = (int)EaseElasticIn((float)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((float)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, (float)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;
|
|
} |