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Replaced GenImageGradientH and GenImageGradientV with GenImageLinearGradient (#3074)

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* Replaced GenImageGradientH and GenImageGradientV with GenImageLinearGradient

* renamed GenImageLinearGradient to GenImageGradientLinear
This commit is contained in:
Dane Madsen
2023-05-21 19:33:47 +10:00
committed by GitHub
parent 1b4634702c
commit e96dc46d38
10 changed files with 358 additions and 407 deletions
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57
src/rtextures.c
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@@ -684,48 +684,35 @@ Image GenImageColor(int width, int height, Color color)
}
#if defined(SUPPORT_IMAGE_GENERATION)
// Generate image: vertical gradient
Image GenImageGradientV(int width, int height, Color top, Color bottom)
// Generate image: linear gradient
// The direction value specifies the direction of the gradient (in degrees)
// with 0 being vertical (from top to bottom), 90 being horizontal (from left to right).
// The gradient effectively rotates counter-clockwise by the specified amount.
Image GenImageGradientLinear(int width, int height, int direction, Color start, Color end)
{
Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color));
for (int j = 0; j < height; j++)
float radianDirection = (float)(90 - direction) / 180.f * 3.14159f;
float cosDir = cos(radianDirection);
float sinDir = sin(radianDirection);
int i, j;
for (i = 0; i < width; i++)
{
float factor = (float)j/(float)height;
for (int i = 0; i < width; i++)
for (j = 0; j < height; j++)
{
pixels[j*width + i].r = (int)((float)bottom.r*factor + (float)top.r*(1.f - factor));
pixels[j*width + i].g = (int)((float)bottom.g*factor + (float)top.g*(1.f - factor));
pixels[j*width + i].b = (int)((float)bottom.b*factor + (float)top.b*(1.f - factor));
pixels[j*width + i].a = (int)((float)bottom.a*factor + (float)top.a*(1.f - factor));
}
}
// Calculate the relative position of the pixel along the gradient direction
float pos = (i * cosDir + j * sinDir) / (width * cosDir + height * sinDir);
Image image = {
.data = pixels,
.width = width,
.height = height,
.format = PIXELFORMAT_UNCOMPRESSED_R8G8B8A8,
.mipmaps = 1
};
float factor = pos;
factor = (factor > 1.f) ? 1.f : factor; // Clamp to [0,1]
factor = (factor < 0.f) ? 0.f : factor; // Clamp to [0,1]
return image;
}
// Generate image: horizontal gradient
Image GenImageGradientH(int width, int height, Color left, Color right)
{
Color *pixels = (Color *)RL_MALLOC(width*height*sizeof(Color));
for (int i = 0; i < width; i++)
{
float factor = (float)i/(float)width;
for (int j = 0; j < height; j++)
{
pixels[j*width + i].r = (int)((float)right.r*factor + (float)left.r*(1.f - factor));
pixels[j*width + i].g = (int)((float)right.g*factor + (float)left.g*(1.f - factor));
pixels[j*width + i].b = (int)((float)right.b*factor + (float)left.b*(1.f - factor));
pixels[j*width + i].a = (int)((float)right.a*factor + (float)left.a*(1.f - factor));
// Generate the color for this pixel
pixels[j * width + i].r = (int)((float)end.r*factor + (float)start.r*(1.f - factor));
pixels[j * width + i].g = (int)((float)end.g*factor + (float)start.g*(1.f - factor));
pixels[j * width + i].b = (int)((float)end.b*factor + (float)start.b*(1.f - factor));
pixels[j * width + i].a = (int)((float)end.a*factor + (float)start.a*(1.f - factor));
}
}