Annika/UwUGL
1
0
Fork 1
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

added mappers to rest of primatives

Browse Source
This commit is contained in:
Annika
2026-07-24 18:31:49 -07:00
parent 78ec985f7a
commit eddbb85256
6 changed files with 49 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files
primatives/triangle.cpp
+8 -4
View File
@@ -7,6 +7,7 @@
#include "../helpers.cpp"
#include "../buffer.cpp"
#include "../shaders/shaders.h"
#include "../mappers/mappers.h"
namespace UwU {
class Triangle {
@@ -30,8 +31,8 @@ namespace UwU {
uint16_t y2;
// Draw a triangle
template <class ShaderT>
void draw (Buffer buffer, ShaderBase<ShaderT>& shader) {
template <class MapperT, class ShaderT>
void draw (Buffer buffer, MapperBase<MapperT>& mapper, ShaderBase<ShaderT>& shader) {
uint16_t topX, topY, midX, midY, btmX, btmY;
// Find top, middle and bottom points of triangle
if (y0 <= y1 && y0 <= y2) {
@@ -90,19 +91,22 @@ 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;
// 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++) {
buffer.drawPixel(x, i + (uint16_t)topY, shader.shade(x, i + (uint16_t)topY));
uv = mapper.map(x, i + (uint16_t)topY);
buffer.drawPixel(x, i + (uint16_t)topY, shader.shade(uv.x, uv.y));
}
}
// Right-handed triangle case (midpoint is right of triangle)
} else {
for (uint16_t i = 0; i < height; i++) {
for (uint16_t x = (uint16_t)longBound[i]; x <= (uint16_t)splitBound[i]; x++) {
buffer.drawPixel(x, i + (uint16_t)topY, shader.shade(x, i + (uint16_t)topY));
uv = mapper.map(x, i + (uint16_t)topY);
buffer.drawPixel(x, i + (uint16_t)topY, shader.shade(uv.x, uv.y));
}
}
}