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correcting the size for memset
early clipping check
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TMK 2025-09-15 17:10:37 +09:00 committed by GitHub
parent d437434cf9
commit d006955398
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GPG Key ID: B5690EEEBB952194
1 changed files with 26 additions and 17 deletions
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39
src/Graphics_SoftFP.c
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@ -6,6 +6,7 @@
#include <limits.h>
#include <stdint.h>
// 16.16 fixed point
#define FP_SHIFT 16
#define FP_ONE (1 << FP_SHIFT)
@ -179,8 +180,7 @@ static void ClearColorBuffer(void) {
int i, x, y, size = fb_width * fb_height;
if (cb_stride == fb_width) {
//for (i = 0; i < size; i++) colorBuffer[i] = clearColor;
Mem_Set(colorBuffer, clearColor, sizeof(colorBuffer) * size);
Mem_Set(colorBuffer, clearColor, sizeof(BitmapCol) * size);
} else {
for (y = 0; y < fb_height; y++) {
i = y * cb_stride;
@ -989,28 +989,37 @@ static void ProcessClippedTriangleAndDraw(const VertexFixed* inVerts, int polyCo
}
}
static cc_bool TriangleFullyInsideFrustum(const VertexFixed tri[3]) {
const int planes[6] = { PLANE_LEFT, PLANE_RIGHT, PLANE_BOTTOM, PLANE_TOP, PLANE_NEAR, PLANE_FAR };
for (int p = 0; p < 6; p++) {
for (int i = 0; i < 3; i++) {
if (PlaneDistFixed(&tri[i], planes[p]) < 0) return false;
}
}
return true;
}
static void DrawClippedFixed(int mask, VertexFixed* v0, VertexFixed* v1, VertexFixed* v2, VertexFixed* v3) {
VertexFixed inTri[3], outPoly[16];
int polyCount;
// Triangle 1: v0, v1, v2
inTri[0] = *v0;
inTri[1] = *v1;
inTri[2] = *v2;
inTri[0] = *v0; inTri[1] = *v1; inTri[2] = *v2;
if (TriangleFullyInsideFrustum(inTri)) {
// fully inside
ProcessClippedTriangleAndDraw(inTri, 3);
} else {
polyCount = ClipTriangleToFrustumFixed(inTri, outPoly);
if (polyCount > 0) {
ProcessClippedTriangleAndDraw(outPoly, polyCount);
if (polyCount > 0) ProcessClippedTriangleAndDraw(outPoly, polyCount);
}
// triangle 2: v2, v3, v0
inTri[0] = *v2;
inTri[1] = *v3;
inTri[2] = *v0;
// Triangle 2: v2, v3, v0
inTri[0] = *v2; inTri[1] = *v3; inTri[2] = *v0;
if (TriangleFullyInsideFrustum(inTri)) {
ProcessClippedTriangleAndDraw(inTri, 3);
} else {
polyCount = ClipTriangleToFrustumFixed(inTri, outPoly);
if (polyCount > 0) {
ProcessClippedTriangleAndDraw(outPoly, polyCount);
if (polyCount > 0) ProcessClippedTriangleAndDraw(outPoly, polyCount);
}
}