sigonasr2/SigRenderer3
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Hello Cube

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Co-authored-by: sigonasr2 <sigonasr2@gmail.com>
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sigonasr2 2022-10-09 06:02:47 -05:00
parent 2515c9ed01
commit 90093ef258
1 changed files with 42 additions and 25 deletions
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67
main.cpp
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@ -143,33 +143,50 @@ public:
triTranslated.p[1].z = triRotatedZX.p[1].z + 3.0f; triTranslated.p[1].z = triRotatedZX.p[1].z + 3.0f;
triTranslated.p[2].z = triRotatedZX.p[2].z + 3.0f; triTranslated.p[2].z = triRotatedZX.p[2].z + 3.0f;
// Project triangles from 3D --> 2D vec3d normal,line1,line2;
MultiplyMatrixVector(triTranslated.p[0], triProjected.p[0], matProj); line1.x=triTranslated.p[1].x-triTranslated.p[0].x;
MultiplyMatrixVector(triTranslated.p[1], triProjected.p[1], matProj); line1.y=triTranslated.p[1].y-triTranslated.p[0].y;
MultiplyMatrixVector(triTranslated.p[2], triProjected.p[2], matProj); line1.z=triTranslated.p[1].z-triTranslated.p[0].z;
line2.x=triTranslated.p[2].x-triTranslated.p[0].x;
line2.y=triTranslated.p[2].y-triTranslated.p[0].y;
line2.z=triTranslated.p[2].z-triTranslated.p[0].z;
// Scale into view normal.x=line1.y*line2.z-line1.z*line2.y;
triProjected.p[0].x += 1.0f; triProjected.p[0].y += 1.0f; normal.y=line1.z*line2.x-line1.x*line2.z;
triProjected.p[1].x += 1.0f; triProjected.p[1].y += 1.0f; normal.z=line1.x*line2.y-line1.y*line2.x;
triProjected.p[2].x += 1.0f; triProjected.p[2].y += 1.0f;
triProjected.p[0].x *= 0.5f * (float)ScreenWidth();
triProjected.p[0].y *= 0.5f * (float)ScreenHeight();
triProjected.p[1].x *= 0.5f * (float)ScreenWidth();
triProjected.p[1].y *= 0.5f * (float)ScreenHeight();
triProjected.p[2].x *= 0.5f * (float)ScreenWidth();
triProjected.p[2].y *= 0.5f * (float)ScreenHeight();
// Rasterize triangle float l = sqrtf(normal.x*normal.x+normal.y*normal.y+normal.z*normal.z);
SetDecalMode(DecalMode::WIREFRAME); normal.x/=l;normal.y/=l;normal.z/=l;
DrawPolygonDecal(nullptr,{
{triProjected.p[0].x, triProjected.p[0].y}, if (normal.z<0) {
{triProjected.p[1].x, triProjected.p[1].y}, // Project triangles from 3D --> 2D
{triProjected.p[2].x, triProjected.p[2].y} MultiplyMatrixVector(triTranslated.p[0], triProjected.p[0], matProj);
},{ MultiplyMatrixVector(triTranslated.p[1], triProjected.p[1], matProj);
{0,0}, MultiplyMatrixVector(triTranslated.p[2], triProjected.p[2], matProj);
{0,0},
{0,0}, // Scale into view
}); triProjected.p[0].x += 1.0f; triProjected.p[0].y += 1.0f;
triProjected.p[1].x += 1.0f; triProjected.p[1].y += 1.0f;
triProjected.p[2].x += 1.0f; triProjected.p[2].y += 1.0f;
triProjected.p[0].x *= 0.5f * (float)ScreenWidth();
triProjected.p[0].y *= 0.5f * (float)ScreenHeight();
triProjected.p[1].x *= 0.5f * (float)ScreenWidth();
triProjected.p[1].y *= 0.5f * (float)ScreenHeight();
triProjected.p[2].x *= 0.5f * (float)ScreenWidth();
triProjected.p[2].y *= 0.5f * (float)ScreenHeight();
// Rasterize triangle
SetDecalMode(DecalMode::WIREFRAME);
DrawPolygonDecal(nullptr,{
{triProjected.p[0].x, triProjected.p[0].y},
{triProjected.p[1].x, triProjected.p[1].y},
{triProjected.p[2].x, triProjected.p[2].y}
},{
{0,0},
{0,0},
{0,0},
});
}
} }