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Add a density parameter to GenImageRadialGradient

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Wilhem Barbier
2017-06-28 17:27:47 +02:00
parent c3049a9b06
commit 786cd63057
3 changed files with 5 additions and 4 deletions
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5
src/textures.c
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@@ -1493,7 +1493,7 @@ Image GenImageGradientH(int width, int height, Color left, Color right)
}
// Generate image: radial gradient
Image GenImageRadialGradient(int width, int height, Color inner, Color outer)
Image GenImageRadialGradient(int width, int height, float density, Color inner, Color outer)
{
Color *pixels = (Color*)malloc(width * height * sizeof(Color));
float radius = (width < height) ? (float)width / 2.f : (float)height / 2.f;
@@ -1505,7 +1505,8 @@ Image GenImageRadialGradient(int width, int height, Color inner, Color outer)
for (int x = 0; x < width; x++)
{
float dist = hypotf((float)x - center_x, (float)y - center_y);
float factor = dist / radius;
float factor = (dist - radius * density) / (radius * (1.f - density));
factor = fmax(factor, 0.f);
factor = fmin(factor, 1.f); // dist can be bigger than radius so we have to check
pixels[y*width + x].r = (int)((float)outer.r * factor + (float)inner.r * (1.f - factor));
pixels[y*width + x].g = (int)((float)outer.g * factor + (float)inner.g * (1.f - factor));