diff options
| author | chai <chaifix@163.com> | 2020-07-19 17:01:00 +0800 |
|---|---|---|
| committer | chai <chaifix@163.com> | 2020-07-19 17:01:00 +0800 |
| commit | 5b89a0fab0a46764c92979797681bf170125a7da (patch) | |
| tree | 753d40800dc7dc423bd89e429e6154ca8441d654 /src/core/rasterizer.c | |
| parent | 4deff343b5fd928ae9475eedcf9b6add34b31ae2 (diff) | |
*early back face culling
Diffstat (limited to 'src/core/rasterizer.c')
| -rw-r--r-- | src/core/rasterizer.c | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/src/core/rasterizer.c b/src/core/rasterizer.c index 55d4ad3..9276cbd 100644 --- a/src/core/rasterizer.c +++ b/src/core/rasterizer.c @@ -44,7 +44,7 @@ float ssrR_area(Vec2* v1, Vec2* v2, Vec2* v3) { return area; } -/*from https://github.com/ssloy/tinyrenderer */ +/*https://github.com/ssloy/tinyrenderer */ bool ssrR_barycentric(Vec2* A, Vec2* B, Vec2* C, Vec2* p, Vec3* out) { ssr_assert(A && B && C && p && out); Vec3 s[2], u; @@ -87,24 +87,10 @@ extern UniformCollection* g_uniforms ; void ssrR_triangle( Vec4* CA, Vec4* CB, Vec4* CC, uint IA, uint IB, uint IC, - Program* program, - bool early_culled + Program* program ) { ssr_assert(CA && CB && CC && program); - /*late back face culling*/ - if (!early_culled && ssr_isenable(ENABLE_BACKFACECULL)) { - float w0 = 1 / CA->w, w1 = 1 / CB->w, w2 = 1 / CC->w; - Vec2 ab, ac; - ab.x = CB->x * w1 - CA->x * w0; - ab.y = CB->y * w1 - CA->y * w0; - ac.x = CC->x * w2 - CA->x * w0; - ac.y = CC->y * w2 - CA->y * w0; - if (ab.x * ac.y - ab.y * ac.x <= 0) { - return; - } - } - UniformCollection* uniforms = g_uniforms; Vec4 SA, SB, SC; @@ -164,7 +150,7 @@ void ssrR_triangle( for (p.x = from; order * (p.x - to) <= 0; p.x += order) { \ /*calculate barycentric coordinate*/ \ s[0].z = sa->x - p.x; \ - internal_vec3_cross(&s[0], &s[1], &u); \ + internal_vec3_cross(&s[0], &s[1], &u); \ discardif(compare(u.z, 0)); \ u.z = 1.f / u.z; \ bc.x = 1.f - (u.x + u.y) * u.z; \ @@ -173,7 +159,7 @@ void ssrR_triangle( discardif(bc.x < 0 || bc.y < 0 || bc.z < 0); \ /*perspective correction*/ \ bc.x *= CAw; bc.y *= CBw; bc.z *= CCw; \ - internal_vec3_scale(&bc, 1.f / (bc.x + bc.y + bc.z), &bc); \ + internal_vec3_scale(&bc, 1.f / (bc.x + bc.y + bc.z), &bc); \ /*early depth testing*/ \ if(depth_test){ \ depth = bc.x*sa->z + bc.y*sb->z + bc.z*sc->z; \ @@ -189,7 +175,7 @@ void ssrR_triangle( /*interpolate varying variables*/ \ ssrS_solveregsbcp(&bc, IA, IB, IC); \ /*enter fragment shader*/ \ - discard = !frag_shader(out_color[0]); \ + discard = !frag_shader(out_color[0]); \ discardif(discard); \ /*put point*/ \ ssr_blendandputpoint(p.x, p.y, blend); \ |