🚧 checkpoint

src/bin/pumpkin.rs

@@ -256,10 +256,14 @@ pub struct GlState {
 	flags: HashMap <u32, bool>,
 	front_face: Option <FrontFace>,
 	stencil: Option <StencilState>,
+	
+	color_mask: Option <(u8, u8, u8, u8)>,
+	depth_mask: Option <u8>,
+	stencil_mask: Option <u32>,
 }
 
 pub struct Pass <'a> {
-	shader: &'a ShaderClosure,
+	shader: Option <&'a ShaderClosure>,
 	
 	// Anything that's None is "don't care"
 	
@@ -279,30 +283,44 @@ impl Pass <'_> {
 			}
 		}
 		
-		match state.front_face {
-			Some (v) => glezz::front_face (v.into ()),
-			_ => (),
+		if let Some (v) = &state.front_face {
+			glezz::front_face ((*v).into ());
 		}
 		
-		match &state.stencil {
-			Some (v) => {
-				let func = &v.func;
-				let op = &v.op;
-				
-				unsafe {
-					gl::StencilFunc (
-						func.func.into (), 
-						func.reference.into (), 
-						func.mask.into ()
-					);
-					gl::StencilOp (
-						op.sfail.into (), 
-						op.dpfail.into (), 
-						op.dppass.into ()
-					);
-				}
-			},
-			_ => (),
+		if let Some (v) = &state.stencil {
+			let func = &v.func;
+			let op = &v.op;
+			
+			unsafe {
+				gl::StencilFunc (
+					func.func.into (), 
+					func.reference.into (), 
+					func.mask.into ()
+				);
+				gl::StencilOp (
+					op.sfail.into (), 
+					op.dpfail.into (), 
+					op.dppass.into ()
+				);
+			}
+		}
+		
+		if let Some ((r, g, b, a)) = &state.color_mask {
+			unsafe {
+				gl::ColorMask (*r, *g, *b, *a);
+			}
+		}
+		
+		if let Some (v) = &state.depth_mask {
+			unsafe {
+				gl::DepthMask (*v);
+			}
+		}
+		
+		if let Some (v) = &state.stencil_mask {
+			unsafe {
+				gl::StencilMask (*v);
+			}
 		}
 	}
 }
@@ -461,24 +479,41 @@ impl GameGraphics {
 		
 		let light = Vec3::from ((0.25, -0.125, 1.0)).normalize ();
 		
-		glezz::clear_color (1.0f32, 0.0f32, 1.0f32, 1.0f32);
-		glezz::clear (gl::COLOR_BUFFER_BIT | gl::DEPTH_BUFFER_BIT | gl::STENCIL_BUFFER_BIT);
-		
 		let passes = vec! [
+			// Clear everything
 			Pass {
-				shader: &self.shader_diffuse,
+				shader: None,
+				required_state: GlState {
+					flags: hashmap! {},
+					front_face: None,
+					stencil: None,
+					color_mask: Some ((1, 1, 1, 1)),
+					depth_mask: Some (1),
+					stencil_mask: Some (255),
+				},
+			},
+			// Draw world
+			Pass {
+				shader: Some (&self.shader_diffuse),
 				required_state: GlState {
 					flags: hashmap! {
+						gl::DEPTH_TEST => true,
+						gl::TEXTURE_2D => true,
 						gl::STENCIL_TEST => false,
 					},
 					front_face: Some (FrontFace::Cw),
 					stencil: None,
+					color_mask: Some ((1, 1, 1, 1)),
+					depth_mask: Some (1),
+					stencil_mask: Some (0),
 				},
 			},
+			// Write shadows into stencil buffer
 			Pass {
-				shader: &self.shader_shadow,
+				shader: Some (&self.shader_shadow),
 				required_state: GlState {
 					flags: hashmap! {
+						gl::DEPTH_TEST => true,
 						gl::STENCIL_TEST => true,
 					},
 					front_face: Some (FrontFace::Ccw),
@@ -494,12 +529,18 @@ impl GameGraphics {
 							dppass: StencilOp::Replace,
 						},
 					}),
+					color_mask: Some ((0, 0, 0, 0)),
+					depth_mask: Some (0),
+					stencil_mask: Some (255),
 				},
 			},
+			// Draw lit ground
 			Pass {
-				shader: &self.shader_shadow,
+				shader: Some (&self.shader_diffuse),
 				required_state: GlState {
 					flags: hashmap! {
+						gl::DEPTH_TEST => true,
+						gl::TEXTURE_2D => true,
 						gl::STENCIL_TEST => true,
 					},
 					front_face: Some (FrontFace::Cw),
@@ -515,12 +556,18 @@ impl GameGraphics {
 							dppass: StencilOp::Keep,
 						},
 					}),
+					color_mask: Some ((1, 1, 1, 1)),
+					depth_mask: Some (1),
+					stencil_mask: Some (0),
 				},
 			},
+			// Draw unlit ground
 			Pass {
-				shader: &self.shader_shadow,
+				shader: Some (&self.shader_diffuse),
 				required_state: GlState {
 					flags: hashmap! {
+						gl::DEPTH_TEST => true,
+						gl::TEXTURE_2D => true,
 						gl::STENCIL_TEST => true,
 					},
 					front_face: Some (FrontFace::Cw),
@@ -536,10 +583,17 @@ impl GameGraphics {
 							dppass: StencilOp::Keep,
 						},
 					}),
+					color_mask: Some ((1, 1, 1, 1)),
+					depth_mask: Some (1),
+					stencil_mask: Some (0),
 				},
 			},
 		];
 		
+		passes [0].apply_slow ();
+		glezz::clear_color (1.0f32, 0.0f32, 1.0f32, 1.0f32);
+		glezz::clear (gl::COLOR_BUFFER_BIT | gl::DEPTH_BUFFER_BIT | gl::STENCIL_BUFFER_BIT);
+		
 		glezz::enable (gl::CULL_FACE);
 		
 		let pumpkin_model_mat = 
@@ -552,15 +606,12 @@ impl GameGraphics {
 		
 		use uniforms::*;
 		
-		glezz::enable (gl::DEPTH_TEST);
-		glezz::enable (gl::TEXTURE_2D);
-		
 		self.shader_diffuse.with (|shader_vars| {
 			let unis = shader_vars.unis;
 			let attrs = shader_vars.attrs;
 			
 			// Pass 0 - Draw the world except the ground plane
-			passes [0].apply_slow ();
+			passes [1].apply_slow ();
 			
 			let mvp = view_mat * pumpkin_model_mat;
 			glezz::uniform_matrix_4fv (unis [&MVP], &mvp);
@@ -619,13 +670,8 @@ impl GameGraphics {
 			let unis = shader_vars.unis;
 			let attrs = shader_vars.attrs;
 			
-			// Pass 1: Draw shadows into stencil buffer
-			passes [1].apply_slow ();
-			unsafe {
-				gl::ColorMask (0, 0, 0, 0);
-				gl::DepthMask (0);
-				gl::StencilMask (1);
-			}
+			// Draw shadows into stencil buffer
+			passes [2].apply_slow ();
 			
 			let view_mat = view_mat * shadow_mat;
 			
@@ -651,12 +697,8 @@ impl GameGraphics {
 			let unis = shader_vars.unis;
 			let attrs = shader_vars.attrs;
 			
-			// Pass 2: Draw lit ground
-			passes [2].apply_slow ();
-			unsafe {
-				gl::ColorMask (255, 255, 255, 255);
-				gl::DepthMask (1);
-			}
+			// Draw lit ground
+			passes [3].apply_slow ();
 			
 			let inverse_pumpkin = pumpkin_model_mat.inverse ();
 			
@@ -676,8 +718,8 @@ impl GameGraphics {
 			glezz::uniform_3fv (unis [&OBJECT_SPACE_LIGHT], &Vec3::from ((0.0, 0.0, 0.0)));
 			self.mesh_pitch.draw (attrs, self.grass_index);
 			
-			// Pass 3: Draw shadowed ground
-			passes [3].apply_slow ();
+			// Draw shadowed ground
+			passes [4].apply_slow ();
 			
 			glezz::uniform_3fv (unis [&OBJECT_SPACE_LIGHT], &object_space_light);
 			self.mesh_pitch.draw (attrs, self.grass_index);