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Hotfix for glitchy camera

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Super small fix that was causing the camera to glitch every x amount of seconds/pixels. Works much better now, 3/4 lines changed.
This commit is contained in:
Gianni Alessandroni 2021-05-14 15:48:07 +02:00
parent 232378ed2d
commit 17eaca46d7
1 changed files with 13 additions and 19 deletions
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32
examples/core/core_2d_camera_smooth_pixelperfect.c
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@ -25,7 +25,7 @@ int main(void)
const int virualScreenWidth = 160; const int virualScreenWidth = 160;
const int virtualScreenHeight = 90; const int virtualScreenHeight = 90;
const float virtualRatio = (float)screenWidth/(float)virualScreenWidth; const float virtualRatio = (float)screenWidth / (float)virualScreenWidth;
InitWindow(screenWidth, screenHeight, "raylib [core] example - smooth pixel-perfect camera"); InitWindow(screenWidth, screenHeight, "raylib [core] example - smooth pixel-perfect camera");
@ -43,7 +43,7 @@ int main(void)
//The renderTexture's height is flipped (in the source Rectangle), due to OpenGL reasons. //The renderTexture's height is flipped (in the source Rectangle), due to OpenGL reasons.
Rectangle renderTextureSource = { 0.0f, 0.0f, (float)renderTexture.texture.width, (float)-renderTexture.texture.height }; Rectangle renderTextureSource = { 0.0f, 0.0f, (float)renderTexture.texture.width, (float)-renderTexture.texture.height };
Rectangle renderTextureDest = { -virtualRatio, -virtualRatio, screenWidth + (virtualRatio*2), screenHeight + (virtualRatio*2) }; Rectangle renderTextureDest = { -virtualRatio, -virtualRatio, screenWidth + (virtualRatio * 2), screenHeight + (virtualRatio * 2) };
Vector2 origin = { 0.0f, 0.0f }; Vector2 origin = { 0.0f, 0.0f };
@ -61,30 +61,24 @@ int main(void)
{ {
// Update // Update
//---------------------------------------------------------------------------------- //----------------------------------------------------------------------------------
rotation += degreesPerSecond*GetFrameTime(); // Rotate the rectangles. rotation += degreesPerSecond * GetFrameTime(); // Rotate the rectangles.
// Make the camera move to demonstrate the effect. // Make the camera move to demonstrate the effect.
cameraX = (sinf(GetTime())*50.0f) - 10.0f; cameraX = (sinf(GetTime()) * 50.0f) - 10.0f;
cameraY = cosf(GetTime())*30.0f; cameraY = cosf(GetTime()) * 30.0f;
// Set the camera's target to the values computed above. // Set the camera's target to the values computed above.
screenSpaceCamera.target = (Vector2){ cameraX, cameraY }; screenSpaceCamera.target = (Vector2){ cameraX, cameraY };
// Round worldCamera's X, keep the decimals on screenSpaceCamera. //Round worldSpace coordinates, keep decimals into screenSpace coordinates.
if (screenSpaceCamera.target.x >= 1 || screenSpaceCamera.target.x <= -1) worldSpaceCamera.target.x = (int)screenSpaceCamera.target.x;
{ screenSpaceCamera.target.x -= worldSpaceCamera.target.x;
worldSpaceCamera.target.x = (int)screenSpaceCamera.target.x; screenSpaceCamera.target.x *= virtualRatio;
screenSpaceCamera.target.x -= worldSpaceCamera.target.x;
screenSpaceCamera.target.x *= virtualRatio; worldSpaceCamera.target.y = (int)screenSpaceCamera.target.y;
} screenSpaceCamera.target.y -= worldSpaceCamera.target.y;
screenSpaceCamera.target.y *= virtualRatio;
// Round worldCamera's Y, keep the decimals on screenSpaceCamera.
if (screenSpaceCamera.target.y >= 1 || screenSpaceCamera.target.y <= -1)
{
worldSpaceCamera.target.y = (int)screenSpaceCamera.target.y;
screenSpaceCamera.target.y -= worldSpaceCamera.target.y;
screenSpaceCamera.target.y *= virtualRatio;
}
//---------------------------------------------------------------------------------- //----------------------------------------------------------------------------------
// Draw // Draw