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Refactor vertex and texture coordinate handling in dMCloth_c::plot_shadow for improved clarity and correctness.

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Briggs Baltzell
2026-03-05 12:28:08 -06:00
parent 98af1f807f
commit 156149f947
1 changed files with 29 additions and 20 deletions
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src/d/d_menu_cloth.cpp
+29 -20
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@@ -383,39 +383,48 @@ void dMCloth_c::plot_shadow(float xMin, float yMin, float xMax, float yMax) {
const f32 xStep = (xMax - xMin) * (1.0f / (f32)(INNER_SIZE - 1));
const f32 yStep = (yMax - yMin) * (1.0f / (f32)(INNER_SIZE - 1));
int x = 0, xNext = 1;
for (x = 0; x < INNER_SIZE - 1; x++, xNext++) {
int xNext = 1;
for (int x = 0; x < INNER_SIZE - 1; x++, xNext++) {
GXBegin(GX_TRIANGLESTRIP, GX_VTXFMT0, INNER_SIZE * 2);
f32 yPos = yMax;
for (int y = 0; y < INNER_SIZE - 1; y++) {
for (int y = 0; y < INNER_SIZE; y++) {
f32 xPos2 = xPos + xStep;
switch (mClothType) {
case MENU_CLOTH_TYPE_0:
case MENU_CLOTH_TYPE_2: {
GXPosition1x16(x + y * INNER_SIZE);
GXPosition1x16(x + y * INNER_SIZE);
GXPosition2f32(xPos, yPos);
GXTexCoord2f32(xPos, yPos);
GXPosition1x16(xNext + y * INNER_SIZE);
GXPosition1x16(xNext + y * INNER_SIZE);
GXPosition2f32(xPos2, yPos);
GXTexCoord2f32(xPos2, yPos);
} break;
case MENU_CLOTH_TYPE_1: {
int iv2, iv3, iv5;
iv5 = (10 - x + y) * 25;
iv2 = iv5 > 0xFF ? 0xFF : iv5;
iv3 = (10 - xNext + y) * 25;
iv5 = iv3 > 0xFF ? 0xFF : iv3;
GXPosition1x16(x + y * INNER_SIZE);
GXPosition1x16(x + y * INNER_SIZE);
GXPosition3s8(mColor2.r, mColor2.g, mColor2.b);
GXPosition1x8(iv2);
GXPosition2f32(xPos, yPos);
GXPosition1x16(xNext + y * INNER_SIZE);
GXPosition1x16(xNext + y * INNER_SIZE);
GXPosition3s8(mColor2.r, mColor2.g, mColor2.b);
GXPosition1x8(iv5);
GXPosition2f32(xPos2, yPos);
u8 alpha0, alpha1;
{
const int fromEnd = 10 - x;
const int fromEndNext = 10 - xNext;
const int fromTopRight = fromEnd + y;
const int fromTopRightNext = fromEndNext + y;
alpha0 = cLib_maxLimit(fromTopRight * 25, 0xFF);
alpha1 = cLib_maxLimit(fromTopRightNext * 25, 0xFF);
}
{
const s16 idx = x + y * INNER_SIZE;
GXPosition2u16(idx, idx);
GXColor4x8(mColor2.r, mColor2.g, mColor2.b, alpha0);
GXTexCoord2f32(xPos, yPos);
}
{
const s16 idx = xNext + y * INNER_SIZE;
GXPosition2u16(idx, idx);
GXColor4x8(mColor2.r, mColor2.g, mColor2.b, alpha1);
GXTexCoord2f32(xPos2, yPos);
}
} break;
}