Translucent rendering and sorting now occurs.

Faceball2030/assets/map/map1.map

@@ -1,34 +1,38 @@
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Faceball2030/assets/map/map2.map

@@ -0,0 +1,27 @@
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Faceball2030/assets/map/map3.map

@@ -0,0 +1,27 @@
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Faceball2030/assets/map/map4.map

@@ -0,0 +1,27 @@
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Faceball2030/assets/map/map5.map

@@ -0,0 +1,27 @@
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Faceball2030/main.cpp

@@ -169,32 +169,40 @@ void FaceBall::LoadLevel(int level)
 				if (vi2d{ x,y } == vi2d{exitCoords.x, exitCoords.y + 1}) {
 					exitWallTex = exit_wall_tex;
 				}
-				mapWalls.tris.push_back({ {{(float)x,1,(float)y},{(float)x,0,(float)y},{(float)x + 1,1,(float)y}},{{0,0},{0,1},{1,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+				if (vi2d{x,y} != exitCoords) {
-				mapWalls.tris.push_back({ {{(float)x,0,(float)y},{(float)x + 1,0,(float)y},{(float)x + 1,1,(float)y}},{{0,1},{1,1},{1,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x,1,(float)y},{(float)x,0,(float)y},{(float)x + 1,1,(float)y}},{{0,0},{0,1},{1,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x,0,(float)y},{(float)x + 1,0,(float)y},{(float)x + 1,1,(float)y}},{{0,1},{1,1},{1,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+				}
 			}
 			if (map[y][x].wallS != NULL) {
 				Decal* exitWallTex = wall_tex;
 				if (vi2d{ x,y } == vi2d{ exitCoords.x, exitCoords.y - 1 }) {
 					exitWallTex = exit_wall_tex;
 				}
-				mapWalls.tris.push_back({ {{(float)x + 1,1,(float)y + 1},{(float)x,0,(float)y + 1},{(float)x,1,(float)y + 1}},{{0,0},{1,1},{1,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+				if (vi2d{ x,y } != exitCoords) {
-				mapWalls.tris.push_back({ {{(float)x + 1,1,(float)y + 1},{(float)x + 1,0,(float)y + 1},{(float)x,0,(float)y + 1}},{{0,0},{0,1},{1,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x + 1,1,(float)y + 1},{(float)x,0,(float)y + 1},{(float)x,1,(float)y + 1}},{{0,0},{1,1},{1,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x + 1,1,(float)y + 1},{(float)x + 1,0,(float)y + 1},{(float)x,0,(float)y + 1}},{{0,0},{0,1},{1,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+				}
 			}
 			if (map[y][x].wallW != NULL) {
 				Decal* exitWallTex = wall_tex;
 				if (vi2d{ x,y } == vi2d{ exitCoords.x+1, exitCoords.y }) {
 					exitWallTex = exit_wall_tex;
 				}
-				mapWalls.tris.push_back({ {{(float)x,1,(float)y},{(float)x,1,(float)y + 1}, {(float)x,0,(float)y + 1}},{{1,0},{0,0},{0,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+				if (vi2d{ x,y } != exitCoords) {
-				mapWalls.tris.push_back({ {{(float)x,0,(float)y},{(float)x,1,(float)y}, {(float)x,0,(float)y + 1}}, {{1,1},{1,0},{0,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x,1,(float)y},{(float)x,1,(float)y + 1}, {(float)x,0,(float)y + 1}},{{1,0},{0,0},{0,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x,0,(float)y},{(float)x,1,(float)y}, {(float)x,0,(float)y + 1}}, {{1,1},{1,0},{0,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+				}
 			}
 			if (map[y][x].wallE != NULL) {
 				Decal* exitWallTex = wall_tex;
 				if (vi2d{ x,y } == vi2d{ exitCoords.x - 1, exitCoords.y }) {
 					exitWallTex = exit_wall_tex;
 				}
-				mapWalls.tris.push_back({ {{(float)x + 1,0,(float)y + 1},{(float)x + 1,1,(float)y + 1},{(float)x + 1,1,(float)y}},{{1,1},{1,0},{0,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+				if (vi2d{ x,y } != exitCoords) {
-				mapWalls.tris.push_back({ {{(float)x + 1,0,(float)y + 1} ,{(float)x + 1,1,(float)y},{(float)x + 1,0,(float)y}},{{1,1},{0,0},{0,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x + 1,0,(float)y + 1},{(float)x + 1,1,(float)y + 1},{(float)x + 1,1,(float)y}},{{1,1},{1,0},{0,0}},{WHITE,WHITE,WHITE}, exitWallTex });
+					mapWalls.tris.push_back({ {{(float)x + 1,0,(float)y + 1} ,{(float)x + 1,1,(float)y},{(float)x + 1,0,(float)y}},{{1,1},{0,0},{0,1}},{WHITE,WHITE,WHITE}, exitWallTex });
+				}
 			}
 		}
 	}
@@ -589,17 +597,18 @@ int FaceBall::Triangle_ClipAgainstPlane(vec3d plane_p, vec3d plane_n, Triangle&
 	}
 }
 
-void FaceBall::RenderBulletMesh(mat4x4& matView, std::vector<Triangle>& vecTrianglesToRaster, Bullet& b) {
+void FaceBall::RenderBulletMesh(mat4x4& matView, std::vector<Triangle>& vecTrianglesToRaster, Bullet& b,bool translucent) {
 	for (auto& tri : b.mesh.tris) {
 		tri.col[0] = b.col;
 		tri.col[1] = b.col;
 		tri.col[2] = b.col;
 	}
-	RenderMesh(matView, vecTrianglesToRaster, b);
+	RenderMesh(matView, vecTrianglesToRaster, b,translucent);
 }
 
-void FaceBall::RenderMesh(mat4x4&matView,std::vector<Triangle>&vecTrianglesToRaster, Object&o) {
+void FaceBall::RenderMesh(mat4x4&matView,std::vector<Triangle>&vecTrianglesToRaster, Object&o,bool translucent) {
 	for (auto& tri : o.mesh.tris) {
+		if (translucent&&tri.tex != exit_wall_tex && tri.tex != bullet_tex ||!translucent&&(tri.tex==exit_wall_tex || tri.tex == bullet_tex)) { continue; }
 		Triangle triProjected, triTransformed, triViewed;
 		mat4x4 localMat = Matrix_MakeIdentity();
 		mat4x4 rotMat = Matrix_MakeRotationY(o.rot);
@@ -876,6 +885,7 @@ void FaceBall::RenderWorld() {
 	mat4x4 matView = Matrix_QuickInverse(matCamera);
 
 	std::vector<Triangle>vecTrianglesToRaster;
+	std::vector<Triangle>vecTrianglesToRasterTranslucent;
 
 	// Draw Triangles
 	for (auto& obj : objects) {
@@ -885,13 +895,14 @@ void FaceBall::RenderWorld() {
 	for (Triangle& t : exit.mesh.tris) {
 		t.col[0] = t.col[1] = t.col[2] = {0,(uint8_t)(std::abs(std::sinf(2*PI*gameTimer)) * 255),0};
 	}
-	RenderMesh(matView, vecTrianglesToRaster, walls);
 	for (auto& enemy : enemies) {
 		RenderMesh(matView, vecTrianglesToRaster, enemy);
 	}
 	for (auto& bullet : bullets) {
-		RenderBulletMesh(matView, vecTrianglesToRaster, bullet);
+		RenderBulletMesh(matView, vecTrianglesToRasterTranslucent, bullet);
 	}
+	RenderMesh(matView, vecTrianglesToRaster, walls);
+	RenderMesh(matView, vecTrianglesToRasterTranslucent, walls, true);
 
 	//std::sort(vecTrianglesToRaster.begin(),vecTrianglesToRaster.end(),[](triangle&t1,triangle&t2){return (t1.p[0].z+t1.p[1].z+t1.p[2].z)/3.0f>(t2.p[0].z+t2.p[1].z+t2.p[2].z)/3.0f;});
 	ClearBuffer(BLACK, true);
@@ -961,6 +972,72 @@ void FaceBall::RenderWorld() {
 			triRenderCount++;
 		}
 	}
+	std::sort(vecTrianglesToRasterTranslucent.begin(), vecTrianglesToRasterTranslucent.end(), [](Triangle& t1, Triangle& t2) {return (t1.p[0].z + t1.p[1].z + t1.p[2].z) / 3.0f > (t2.p[0].z + t2.p[1].z + t2.p[2].z) / 3.0f; });
+	for (auto& triToRaster : vecTrianglesToRasterTranslucent) {
+		Triangle clipped[2];
+		std::list<Triangle>listTriangles;
+		listTriangles.push_back(triToRaster);
+		int nNewTriangles = 1;
+
+		for (int p = 0; p < 4; p++)
+		{
+			int nTrisToAdd = 0;
+			while (nNewTriangles > 0)
+			{
+				// Take triangle from front of queue
+				Triangle test = listTriangles.front();
+				listTriangles.pop_front();
+				nNewTriangles--;
+
+				// Clip it against a plane. We only need to test each
+				// subsequent plane, against subsequent new triangles
+				// as all triangles after a plane clip are guaranteed
+				// to lie on the inside of the plane. I like how this
+				// comment is almost completely and utterly justified
+				switch (p)
+				{
+				case 0:	nTrisToAdd = Triangle_ClipAgainstPlane({ 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, test, clipped[0], clipped[1]); break;
+				case 1:	nTrisToAdd = Triangle_ClipAgainstPlane({ 0.0f, (float)ScreenHeight() - 1, 0.0f }, { 0.0f, -1.0f, 0.0f }, test, clipped[0], clipped[1]); break;
+				case 2:	nTrisToAdd = Triangle_ClipAgainstPlane({ 0.0f, 0.0f, 0.0f }, { 1.0f, 0.0f, 0.0f }, test, clipped[0], clipped[1]); break;
+				case 3:	nTrisToAdd = Triangle_ClipAgainstPlane({ (float)ScreenWidth() - 1, 0.0f, 0.0f }, { -1.0f, 0.0f, 0.0f }, test, clipped[0], clipped[1]); break;
+				}
+
+				// Clipping may yield a variable number of triangles, so
+				// add these new ones to the back of the queue for subsequent
+				// clipping against next planes
+				for (int w = 0; w < nTrisToAdd; w++)
+					listTriangles.push_back(clipped[w]);
+			}
+			nNewTriangles = listTriangles.size();
+		}
+
+		for (auto& t : listTriangles) {
+			// Rasterize triangle
+			SetDecalStructure(DecalStructure::LIST);
+			SetDecalMode(DecalMode::NORMAL);
+			DrawPolygonDecal(t.tex, {
+				{t.p[0].x, t.p[0].y},
+				{t.p[1].x, t.p[1].y},
+				{t.p[2].x, t.p[2].y}
+				}, {
+					{t.uv[0].u,t.uv[0].v},
+					{t.uv[1].u,t.uv[1].v},
+					{t.uv[2].u,t.uv[2].v},
+				}, { t.uv[0].w,t.uv[1].w,t.uv[2].w }, { t.p[0].z,t.p[1].z,t.p[2].z }, { t.col[0],t.col[1],t.col[2] });
+			/*SetDecalMode(DecalMode::WIREFRAME);
+			DrawPolygonDecal(nullptr,{
+				{t.p[0].x, t.p[0].y},
+				{t.p[1].x, t.p[1].y},
+				{t.p[2].x, t.p[2].y}
+			},{
+				{0,0},
+				{0,0},
+				{0,0},
+			}, { t.uv[0].w,t.uv[1].w,t.uv[2].w }, { t.p[0].z,t.p[1].z,t.p[2].z }, { BLACK,BLACK,BLACK });*/
+			SetDecalStructure(DecalStructure::FAN);
+			triRenderCount++;
+		}
+	}
 }
 
 void FaceBall::HandleKeys(float fElapsedTime) {

Faceball2030/main.h

@@ -304,8 +304,8 @@ class FaceBall : public PixelGameEngine
 	void InitializeEnemyData();
 	void InitializeBulletColors();
 	void LoadLevel(int level);
-	void RenderBulletMesh(mat4x4& matView, std::vector<Triangle>& vecTrianglesToRaster, Bullet& b);
+	void RenderBulletMesh(mat4x4& matView, std::vector<Triangle>& vecTrianglesToRaster, Bullet& b,bool translucent=true);
-	void RenderMesh(mat4x4&matView, std::vector<Triangle>&vecTrianglesToRaster,Object&o);
+	void RenderMesh(mat4x4&matView, std::vector<Triangle>&vecTrianglesToRaster,Object&o,bool translucent=false);
 	void RenderMeshDeathScreen(mat4x4& matView, std::vector<Triangle>& vecTrianglesToRaster, Object& o);
 	void RunEnemyAI(Enemy& e,float fElapsedTime,int myIndex);
 	void RenderHud(float fElapsedTime);