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DS GX: Fix box test

This commit is contained in:
Vicki Pfau 2017-04-05 19:14:48 -07:00
parent 153f568078
commit a1b30faef3
1 changed files with 25 additions and 27 deletions
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52
src/ds/gx.c
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@ -562,49 +562,47 @@ static bool _boxTest(struct DSGX* gx) {
int16_t d = gx->activeEntries[2].params[2];
d |= gx->activeEntries[2].params[3] << 8;
struct DSGXVertex vertex = {
.coord = { x, y, z }
struct DSGXVertex vertex[8] = {
{ .coord = { x , y , z } },
{ .coord = { x , y , z + d } },
{ .coord = { x , y + h, z } },
{ .coord = { x , y + h, z + d } },
{ .coord = { x + w, y , z } },
{ .coord = { x + w, y , z + d } },
{ .coord = { x + w, y + h, z } },
{ .coord = { x + w, y + h, z + d } },
};
if (_boxTestVertex(gx, &vertex)) {
int code[8];
int i;
for (i = 0; i < 8; ++i) {
vertex[i].viewCoord[0] = _dotViewport(&vertex[i], &gx->clipMatrix.m[0]);
vertex[i].viewCoord[1] = _dotViewport(&vertex[i], &gx->clipMatrix.m[1]);
vertex[i].viewCoord[2] = _dotViewport(&vertex[i], &gx->clipMatrix.m[2]);
vertex[i].viewCoord[3] = _dotViewport(&vertex[i], &gx->clipMatrix.m[3]);
code[i] = _cohenSutherlandCode(&vertex[i]);
}
if (!(code[0] & code[2] & code[4] & code[6])) {
return true;
}
vertex.coord[0] += w;
if (_boxTestVertex(gx, &vertex)) {
if (!(code[1] & code[3] & code[5] & code[7])) {
return true;
}
vertex.coord[0] = x;
vertex.coord[1] += h;
if (_boxTestVertex(gx, &vertex)) {
if (!(code[0] & code[1] & code[4] & code[5])) {
return true;
}
vertex.coord[0] += w;
if (_boxTestVertex(gx, &vertex)) {
if (!(code[2] & code[3] & code[6] & code[7])) {
return true;
}
vertex.coord[0] = x;
vertex.coord[1] = y;
vertex.coord[2] += d;
if (_boxTestVertex(gx, &vertex)) {
if (!(code[0] & code[1] & code[2] & code[3])) {
return true;
}
vertex.coord[0] += w;
if (_boxTestVertex(gx, &vertex)) {
return true;
}
vertex.coord[0] = x;
vertex.coord[1] += h;
if (_boxTestVertex(gx, &vertex)) {
return true;
}
vertex.coord[0] += w;
if (_boxTestVertex(gx, &vertex)) {
if (!(code[4] & code[5] & code[6] & code[7])) {
return true;
}