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[examples] Update shapes_bouncing_ball with gravity (#5217)

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* [examples] Add shapes_bouncing_ball with gravity

* gravity could be enabled/disabled
This commit is contained in:
Jopestpe
2025-09-30 13:32:25 -03:00
committed by GitHub
parent 5d9352a0a1
commit 0e2e8ce225
1 changed files with 14 additions and 4 deletions
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18
examples/shapes/shapes_bouncing_ball.c
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@@ -4,8 +4,10 @@
*
* Example complexity rating: [★☆☆☆] 1/4
*
* Example originally created with raylib 2.5, last time updated with raylib 2.5
* Example originally created with raylib 2.5, last time updated with raylib 5.6
*
* Example contributed by Jopestpe (@jopestpe)
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
*
@@ -31,7 +33,9 @@ int main(void)
Vector2 ballPosition = { GetScreenWidth()/2.0f, GetScreenHeight()/2.0f };
Vector2 ballSpeed = { 5.0f, 4.0f };
int ballRadius = 20;
float gravity = 0.2f;
bool useGravity = true;
bool pause = 0;
int framesCounter = 0;
@@ -43,16 +47,19 @@ int main(void)
{
// Update
//-----------------------------------------------------
if (IsKeyPressed(KEY_G)) useGravity = !useGravity;
if (IsKeyPressed(KEY_SPACE)) pause = !pause;
if (!pause)
{
ballPosition.x += ballSpeed.x;
ballPosition.y += ballSpeed.y;
if (useGravity) ballSpeed.y += gravity;
// Check walls collision for bouncing
if ((ballPosition.x >= (GetScreenWidth() - ballRadius)) || (ballPosition.x <= ballRadius)) ballSpeed.x *= -1.0f;
if ((ballPosition.y >= (GetScreenHeight() - ballRadius)) || (ballPosition.y <= ballRadius)) ballSpeed.y *= -1.0f;
if ((ballPosition.y >= (GetScreenHeight() - ballRadius)) || (ballPosition.y <= ballRadius)) ballSpeed.y *= -0.95f;
}
else framesCounter++;
//-----------------------------------------------------
@@ -65,12 +72,15 @@ int main(void)
DrawCircleV(ballPosition, (float)ballRadius, MAROON);
DrawText("PRESS SPACE to PAUSE BALL MOVEMENT", 10, GetScreenHeight() - 25, 20, LIGHTGRAY);
if (useGravity) DrawText("GRAVITY: ON (Press G to disable)", 10, GetScreenHeight() - 50, 20, DARKGREEN);
else DrawText("GRAVITY: OFF (Press G to enable)", 10, GetScreenHeight() - 50, 20, RED);
// On pause, we draw a blinking message
if (pause && ((framesCounter/30)%2)) DrawText("PAUSED", 350, 200, 30, GRAY);
DrawFPS(10, 10);
EndDrawing();
//-----------------------------------------------------
}