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added gradient shader logic to trapezoids

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Annika
2026-07-08 14:34:55 -07:00
parent b7032c3b8e
commit f61e3a8237
8 changed files with 70 additions and 54 deletions
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primatives/rectangle.cpp
+6 -3
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@@ -29,20 +29,23 @@ namespace UwU {
if (x0 > buffer.width || y0 > buffer.height || x1 > buffer.width || y1 > buffer.height) {return;};
for (uint16_t y = y0; y < y1; y++) {
for (uint16_t x = x0; x < x1; x++) {
buffer.drawPixel(Coord2(x, y), shader.c0);
buffer.drawPixel(x, y, shader.c0);
}
}
return;
} else if (shader.shaderType == HGRADIENT) {
if (x0 > buffer.width || y0 > buffer.height || x1 > buffer.width || y1 > buffer.height) {return;};
// Precompute gradient LUT
Color cols[x1 - x0];
for (uint16_t x = x0; x < x1; x++) {
cols[x - x0] = ShaderMethods::gradient(shader.u0, shader.scale, shader.c0, shader.c1, x);
}
for (uint16_t y = y0; y < y1; y++) {
for (uint16_t x = x0; x < x1; x++) {
buffer.drawPixel(Coord2(x, y), cols[x - x0]);
buffer.drawPixel(x, y, cols[x - x0]);
}
}
return;
@@ -52,7 +55,7 @@ namespace UwU {
for (uint16_t y = y0; y < y1; y++) {
Color c = ShaderMethods::gradient(shader.v0, shader.scale, shader.c0, shader.c1, y);
for (uint16_t x = x0; x < x1; x++) {
buffer.drawPixel(Coord2(x, y), c);
buffer.drawPixel(x, y, c);
}
}
return;