Method RasterTriangle

extensions/olcPGEX_Graphics3D.h:1374–1659

	}

	void GFX3D::RasterTriangle(int x1, int y1, float u1, float v1, float w1, olc::Pixel c1,
							   int x2, int y2, float u2, float v2, float w2, olc::Pixel c2,
							   int x3, int y3, float u3, float v3, float w3, olc::Pixel c3,
							   olc::Sprite* spr,
							   uint32_t nFlags)

	{
		if (y2 < y1)
		{
			std::swap(y1, y2); std::swap(x1, x2); std::swap(u1, u2); std::swap(v1, v2);	std::swap(w1, w2); std::swap(c1, c2);
		}

		if (y3 < y1)
		{
			std::swap(y1, y3); std::swap(x1, x3); std::swap(u1, u3); std::swap(v1, v3); std::swap(w1, w3); std::swap(c1, c3);
		}

		if (y3 < y2)
		{
			std::swap(y2, y3); std::swap(x2, x3); std::swap(u2, u3); std::swap(v2, v3); std::swap(w2, w3); std::swap(c2, c3);
		}

		int dy1 = y2 - y1;
		int dx1 = x2 - x1;
		float dv1 = v2 - v1;
		float du1 = u2 - u1;
		float dw1 = w2 - w1;
		int dcr1 = c2.r - c1.r;
		int dcg1 = c2.g - c1.g;
		int dcb1 = c2.b - c1.b;
		int dca1 = c2.a - c1.a;

		int dy2 = y3 - y1;
		int dx2 = x3 - x1;
		float dv2 = v3 - v1;
		float du2 = u3 - u1;
		float dw2 = w3 - w1;
		int dcr2 = c3.r - c1.r;
		int dcg2 = c3.g - c1.g;
		int dcb2 = c3.b - c1.b;
		int dca2 = c3.a - c1.a;

		float tex_u, tex_v, tex_w;
		float col_r, col_g, col_b, col_a;

		float dax_step = 0, dbx_step = 0,
			du1_step = 0, dv1_step = 0,
			du2_step = 0, dv2_step = 0,
			dw1_step = 0, dw2_step = 0,
			dcr1_step = 0, dcr2_step = 0,
			dcg1_step = 0, dcg2_step = 0,
			dcb1_step = 0, dcb2_step = 0,
			dca1_step = 0, dca2_step = 0;

		if (dy1) dax_step = dx1 / (float)abs(dy1);
		if (dy2) dbx_step = dx2 / (float)abs(dy2);

		if (dy1) du1_step = du1 / (float)abs(dy1);