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added origin to mapper parameters

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Annika
2026-07-24 19:06:14 -07:00
parent eddbb85256
commit 5298e75fdb
10 changed files with 23 additions and 25 deletions
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primatives/triangle.cpp
+4 -2
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@@ -91,13 +91,15 @@ namespace UwU {
// Calculate LUT for short two lines
Helpers::bresenham(0, topX, midY - topY, midX, splitBound);
Helpers::bresenham(midY - topY, midX, height - 1, btmX, splitBound);
Coord2 uv;
uint16_t leftX = std::min(topX, std::min(midX, btmX));
// Left-handed triangle case (midpoint is left of triangle)
if ((int16_t)midX < longBound[midY - topY]) {
for (uint16_t i = 0; i < height; i++) {
for (uint16_t x = (uint16_t)splitBound[i]; x <= (uint16_t)longBound[i]; x++) {
uv = mapper.map(x, i + (uint16_t)topY);
uv = mapper.map(leftX, topY, x, i + (uint16_t)topY);
buffer.drawPixel(x, i + (uint16_t)topY, shader.shade(uv.x, uv.y));
}
}
@@ -105,7 +107,7 @@ namespace UwU {
} else {
for (uint16_t i = 0; i < height; i++) {
for (uint16_t x = (uint16_t)longBound[i]; x <= (uint16_t)splitBound[i]; x++) {
uv = mapper.map(x, i + (uint16_t)topY);
uv = mapper.map(leftX, topY, x, i + (uint16_t)topY);
buffer.drawPixel(x, i + (uint16_t)topY, shader.shade(uv.x, uv.y));
}
}