From b03109dbb087bd441c0e3905753f3dd97d44d7b8 Mon Sep 17 00:00:00 2001
From: quou <quou@disroot.org>
Date: Thu, 2 Jan 2025 15:42:05 +1100
Subject: Simpler depth prepass shader

---
 model.cpp | 48 +++++++++++++++++++++++++++++++-----------------
 1 file changed, 31 insertions(+), 17 deletions(-)

(limited to 'model.cpp')

diff --git a/model.cpp b/model.cpp
index 6aa6510..0b1dee7 100644
--- a/model.cpp
+++ b/model.cpp
@@ -98,8 +98,9 @@ Asset* Model_Loader::load(
 		Mesh& mesh = meshes[i];
 		int vertex_size, vertex_count;
 		char shader_name[28];
+		char depth_shader_name[28];
 		char material_name[28];
-		Shader* shader;
+		Shader* shader, * depth_shader;
 		pack_read(f, magic, 4);
 		if (
 			magic[0] != 'M' ||
@@ -111,14 +112,19 @@ Asset* Model_Loader::load(
 			return 0;
 		}
 		pack_read(f, shader_name, sizeof shader_name);
+		pack_read(f, depth_shader_name, sizeof depth_shader_name);
 		pack_read(f, material_name, sizeof material_name);
 		mesh.offset = icoff;
 		shader = (Shader*)shaders->load(shader_name);
+		depth_shader = (Shader*)shaders->load(depth_shader_name);
 		mesh.material = (Material*)shaders->load(material_name);
 		assert(shader != 0);
+		assert(depth_shader != 0);
 		assert(mesh.material != 0);
 		mesh.shader = shader->id;
+		mesh.depth_shader = depth_shader->id;
 		mesh.mvp_binding = shader->descriptor_binding("c_mvp");
+		mesh.mvp_binding_depth = depth_shader->descriptor_binding("c_mvp");
 		mesh.mat_binding = shader->descriptor_binding("material");
 		mesh.mesh_binding = shader->binding_index("mesh");
 		assert(mesh.mvp_binding >= 0);
@@ -346,25 +352,33 @@ void Model_Instance::render(
 		draw.first_vertex = mesh.offset;
 		draw.vertex_offset = mesh.vbo_offset;
 		pb.begin();
-		if (depth_only)
+		if (depth_only) {
 			pb.depth(true, true, Depth_Mode::less);
-		else
+			pb.shader(mesh.depth_shader);
+			pb.cbuffer(
+				mesh.mvp_binding_depth,
+				mvp,
+				i * sizeof(MVP_Cbuffer),
+				sizeof(MVP_Cbuffer)
+			);
+		} else {
 			pb.depth(true, false, Depth_Mode::equal);
+			pb.shader(mesh.shader);
+			mesh.material->use(pb, sampler, dev->get_shader(mesh.shader));
+			pb.cbuffer(
+				mesh.mat_binding,
+				mat,
+				i * sizeof(Mat_Cbuffer),
+				sizeof(Mat_Cbuffer)
+			);
+			pb.cbuffer(
+				mesh.mvp_binding,
+				mvp,
+				i * sizeof(MVP_Cbuffer),
+				sizeof(MVP_Cbuffer)
+			);
+		}
 		pb.cull(Cull_Mode::back);
-		pb.shader(mesh.shader);
-		mesh.material->use(pb, sampler, dev->get_shader(mesh.shader));
-		pb.cbuffer(
-			mesh.mvp_binding,
-			mvp,
-			i * sizeof(MVP_Cbuffer),
-			sizeof(MVP_Cbuffer)
-		);
-		pb.cbuffer(
-			mesh.mat_binding,
-			mat,
-			i * sizeof(Mat_Cbuffer),
-			sizeof(Mat_Cbuffer)
-		);
 		pb.vertex_format(shader.vf);
 		Pipeline& pip = pb.build();
 		ctx.submit(draw, pip, pass);
-- 
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