From 8c376121c3bc7bc49f52712b10e5e7cbbfd6f472 Mon Sep 17 00:00:00 2001
From: Sascha Willems <webmaster@saschawillems.de>
Date: Sun, 8 May 2022 11:43:06 +0200
Subject: [PATCH] Pass depth range to depth map visualization shader

Fixes #895
---
 .../glsl/shadowmapping/offscreen.frag.spv     | Bin 348 -> 348 bytes
 .../glsl/shadowmapping/offscreen.vert.spv     | Bin 900 -> 900 bytes
 data/shaders/glsl/shadowmapping/quad.frag     |  15 +++++++++++++--
 data/shaders/glsl/shadowmapping/quad.frag.spv | Bin 1420 -> 2128 bytes
 data/shaders/glsl/shadowmapping/quad.vert.spv | Bin 1160 -> 1160 bytes
 .../shaders/glsl/shadowmapping/scene.frag.spv | Bin 5028 -> 5028 bytes
 data/shaders/glsl/shadowmapping/scene.vert    |  11 ++++-------
 .../shaders/glsl/shadowmapping/scene.vert.spv | Bin 3032 -> 3356 bytes
 .../hlsl/shadowmapping/offscreen.frag.spv     | Bin 408 -> 336 bytes
 .../hlsl/shadowmapping/offscreen.vert.spv     | Bin 1028 -> 836 bytes
 data/shaders/hlsl/shadowmapping/quad.frag     |  17 +++++++++++++++--
 data/shaders/hlsl/shadowmapping/quad.frag.spv | Bin 1612 -> 1808 bytes
 .../shaders/hlsl/shadowmapping/scene.frag.spv | Bin 5848 -> 3112 bytes
 data/shaders/hlsl/shadowmapping/scene.vert    |   6 ++++--
 .../shaders/hlsl/shadowmapping/scene.vert.spv | Bin 4364 -> 2612 bytes
 examples/shadowmapping/shadowmapping.cpp      |  13 ++++++++++---
 16 files changed, 46 insertions(+), 16 deletions(-)

diff --git a/data/shaders/glsl/shadowmapping/offscreen.frag.spv b/data/shaders/glsl/shadowmapping/offscreen.frag.spv
index 4d3440f86e1825933e1ea26445c40f8c186990c1..4caadfac84d8e015c656dfba02a73e222b134194 100644
GIT binary patch
delta 18
Zcmcb^bcczPnMs+Qfq{{MYa?ecBLE}K0}cQH

delta 18
Zcmcb^bcczPnMs+Qfq{{MV<TrUBLE}A0}KEF

diff --git a/data/shaders/glsl/shadowmapping/offscreen.vert.spv b/data/shaders/glsl/shadowmapping/offscreen.vert.spv
index e5c7931d4c640eb30a3813e857256e40ae870bd1..8b456320dc3832e8d1a034032286d7f5e0b09f8e 100644
GIT binary patch
delta 18
ZcmZo+Z(-+TW>RKnU|?k6+Q?bW3;-Dq0+Ij#

delta 18
ZcmZo+Z(-+TW>RKnU|?k6*vMJU3;-Dg0+0Xz

diff --git a/data/shaders/glsl/shadowmapping/quad.frag b/data/shaders/glsl/shadowmapping/quad.frag
index afd8389f..86815ca7 100644
--- a/data/shaders/glsl/shadowmapping/quad.frag
+++ b/data/shaders/glsl/shadowmapping/quad.frag
@@ -6,10 +6,21 @@ layout (location = 0) in vec2 inUV;
 
 layout (location = 0) out vec4 outFragColor;
 
+layout (binding = 0) uniform UBO 
+{
+	mat4 projection;
+	mat4 view;
+	mat4 model;
+	mat4 lightSpace;
+	vec4 lightPos;
+	float zNear;
+	float zFar;
+} ubo;
+
 float LinearizeDepth(float depth)
 {
-  float n = 1.0; // camera z near
-  float f = 128.0; // camera z far
+  float n = ubo.zNear;
+  float f = ubo.zFar;
   float z = depth;
   return (2.0 * n) / (f + n - z * (f - n));	
 }
diff --git a/data/shaders/glsl/shadowmapping/quad.frag.spv b/data/shaders/glsl/shadowmapping/quad.frag.spv
index 13c24deef5178a8c4a459614e83ed1c1941e83d6..88c56a212b2fc4a6c75cc1dcdbad1dcc2653b9e5 100644
GIT binary patch
literal 2128
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diff --git a/data/shaders/glsl/shadowmapping/quad.vert.spv b/data/shaders/glsl/shadowmapping/quad.vert.spv
index 5683fcb316e0ff06e54a6f73a0c33ca38f7e937c..822048d724c47414b1e36df04557a1320854ff83 100644
GIT binary patch
delta 18
ZcmeC+?BL{NW>RKnU|?k6+Q?bY0stA{0;2!`

delta 18
ZcmeC+?BL{NW>RKnU|?k6*vMJW0stA-0-*o^

diff --git a/data/shaders/glsl/shadowmapping/scene.frag.spv b/data/shaders/glsl/shadowmapping/scene.frag.spv
index 3f308890d0cc84689dd11c67e8d8e1fdb158b32e..5f723ab7c6ae77099610c6b5f2221cefda743a2a 100644
GIT binary patch
delta 18
ZcmZ3YzC@jqnMs+Qfq{{MYa{1uVE`eY13~}*

delta 18
ZcmZ3YzC@jqnMs+Qfq{{MV<YEmVE`eO13&-(

diff --git a/data/shaders/glsl/shadowmapping/scene.vert b/data/shaders/glsl/shadowmapping/scene.vert
index a9531b86..55bb5ea1 100644
--- a/data/shaders/glsl/shadowmapping/scene.vert
+++ b/data/shaders/glsl/shadowmapping/scene.vert
@@ -11,7 +11,9 @@ layout (binding = 0) uniform UBO
 	mat4 view;
 	mat4 model;
 	mat4 lightSpace;
-	vec3 lightPos;
+	vec4 lightPos;
+	float zNear;
+	float zFar;
 } ubo;
 
 layout (location = 0) out vec3 outNormal;
@@ -20,11 +22,6 @@ layout (location = 2) out vec3 outViewVec;
 layout (location = 3) out vec3 outLightVec;
 layout (location = 4) out vec4 outShadowCoord;
 
-out gl_PerVertex 
-{
-    vec4 gl_Position;   
-};
-
 const mat4 biasMat = mat4( 
 	0.5, 0.0, 0.0, 0.0,
 	0.0, 0.5, 0.0, 0.0,
@@ -40,7 +37,7 @@ void main()
 	
     vec4 pos = ubo.model * vec4(inPos, 1.0);
     outNormal = mat3(ubo.model) * inNormal;
-    outLightVec = normalize(ubo.lightPos - inPos);
+    outLightVec = normalize(ubo.lightPos.xyz - inPos);
     outViewVec = -pos.xyz;			
 
 	outShadowCoord = ( biasMat * ubo.lightSpace * ubo.model ) * vec4(inPos, 1.0);	
diff --git a/data/shaders/glsl/shadowmapping/scene.vert.spv b/data/shaders/glsl/shadowmapping/scene.vert.spv
index b9b214072da85980d6a74fa888b41f9f7f7cd7f6..1782e1007cf8f741f3a2101bd12f490dfdee48a9 100644
GIT binary patch
literal 3356
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diff --git a/data/shaders/hlsl/shadowmapping/offscreen.frag.spv b/data/shaders/hlsl/shadowmapping/offscreen.frag.spv
index 199649f35fb9f146c7c92ea4bc0edb23ae68eb13..edf3c6e01e892c074170d57b4599f7c1cfed1fd1 100644
GIT binary patch
delta 61
zcmbQie1VCVnMs+Qfq{{Mfq{>KXCp5&Bd;|B3j+s`&jiHGlPwwLMeG=u!91WshQC0y
H7C;ODy7UEM

delta 133
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sKrIYxlVus@9Y88TB7#s+JD@rk+ZHGXGKB{!50V3!1mgb%+GzpA04DwiH2?qr

diff --git a/data/shaders/hlsl/shadowmapping/offscreen.vert.spv b/data/shaders/hlsl/shadowmapping/offscreen.vert.spv
index 886d2353cd9b91df1b4e21cb2dc320f96d7b44a9..3c5406dc32c691a937c8a994489a96acdc164c35 100644
GIT binary patch
literal 836
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literal 1028
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diff --git a/data/shaders/hlsl/shadowmapping/quad.frag b/data/shaders/hlsl/shadowmapping/quad.frag
index fb90f429..419f9569 100644
--- a/data/shaders/hlsl/shadowmapping/quad.frag
+++ b/data/shaders/hlsl/shadowmapping/quad.frag
@@ -3,10 +3,23 @@
 Texture2D textureColor : register(t1);
 SamplerState samplerColor : register(s1);
 
+struct UBO
+{
+	float4x4 projection;
+	float4x4 view;
+	float4x4 model;
+	float4x4 lightSpace;
+	float4 lightPos;
+	float zNear;
+	float zFar;
+};
+
+cbuffer ubo : register(b0) { UBO ubo; }
+
 float LinearizeDepth(float depth)
 {
-  float n = 1.0; // camera z near
-  float f = 128.0; // camera z far
+  float n = ubo.zNear;
+  float f = ubo.zFar;
   float z = depth;
   return (2.0 * n) / (f + n - z * (f - n));
 }
diff --git a/data/shaders/hlsl/shadowmapping/quad.frag.spv b/data/shaders/hlsl/shadowmapping/quad.frag.spv
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diff --git a/data/shaders/hlsl/shadowmapping/scene.frag.spv b/data/shaders/hlsl/shadowmapping/scene.frag.spv
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diff --git a/data/shaders/hlsl/shadowmapping/scene.vert b/data/shaders/hlsl/shadowmapping/scene.vert
index 583b6a8e..30ad6138 100644
--- a/data/shaders/hlsl/shadowmapping/scene.vert
+++ b/data/shaders/hlsl/shadowmapping/scene.vert
@@ -14,7 +14,9 @@ struct UBO
 	float4x4 view;
 	float4x4 model;
 	float4x4 lightSpace;
-	float3 lightPos;
+	float4 lightPos;
+	float zNear;
+	float zFar;
 };
 
 cbuffer ubo : register(b0) { UBO ubo; }
@@ -45,7 +47,7 @@ VSOutput main(VSInput input)
 
     float4 pos = mul(ubo.model, float4(input.Pos, 1.0));
     output.Normal = mul((float3x3)ubo.model, input.Normal);
-    output.LightVec = normalize(ubo.lightPos - input.Pos);
+    output.LightVec = normalize(ubo.lightPos.xyz - input.Pos);
     output.ViewVec = -pos.xyz;
 
 	output.ShadowCoord = mul(biasMat, mul(ubo.lightSpace, mul(ubo.model, float4(input.Pos, 1.0))));
diff --git a/data/shaders/hlsl/shadowmapping/scene.vert.spv b/data/shaders/hlsl/shadowmapping/scene.vert.spv
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diff --git a/examples/shadowmapping/shadowmapping.cpp b/examples/shadowmapping/shadowmapping.cpp
index 0592b4fc..b0345ec9 100644
--- a/examples/shadowmapping/shadowmapping.cpp
+++ b/examples/shadowmapping/shadowmapping.cpp
@@ -56,7 +56,10 @@ public:
 		glm::mat4 view;
 		glm::mat4 model;
 		glm::mat4 depthBiasMVP;
-		glm::vec3 lightPos;
+		glm::vec4 lightPos;
+		// Used for depth map visualization
+		float zNear;
+		float zFar;
 	} uboVSscene;
 
 	struct {
@@ -384,7 +387,7 @@ public:
 		// Shared pipeline layout for all pipelines used in this sample
 		std::vector<VkDescriptorSetLayoutBinding> setLayoutBindings = {
 			// Binding 0 : Vertex shader uniform buffer
-			vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT, 0),
+			vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, VK_SHADER_STAGE_VERTEX_BIT | VK_SHADER_STAGE_FRAGMENT_BIT, 0),
 			// Binding 1 : Fragment shader image sampler (shadow map)
 			vks::initializers::descriptorSetLayoutBinding(VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, VK_SHADER_STAGE_FRAGMENT_BIT, 1)
 		};
@@ -409,6 +412,8 @@ public:
 		VkDescriptorSetAllocateInfo allocInfo = vks::initializers::descriptorSetAllocateInfo(descriptorPool, &descriptorSetLayout, 1);
 		VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.debug));
 		writeDescriptorSets = {
+			// Binding 0 : Parameters uniform buffer
+			vks::initializers::writeDescriptorSet(descriptorSets.debug, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 0, &uniformBuffers.scene.descriptor),
 			// Binding 1 : Fragment shader texture sampler
 		    vks::initializers::writeDescriptorSet(descriptorSets.debug, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1, &shadowMapDescriptor)
 		};
@@ -542,8 +547,10 @@ public:
 		uboVSscene.projection = camera.matrices.perspective;
 		uboVSscene.view = camera.matrices.view;
 		uboVSscene.model = glm::mat4(1.0f);
-		uboVSscene.lightPos = lightPos;
+		uboVSscene.lightPos = glm::vec4(lightPos, 1.0f);
 		uboVSscene.depthBiasMVP = uboOffscreenVS.depthMVP;
+		uboVSscene.zNear = zNear;
+		uboVSscene.zFar = zFar;
 		memcpy(uniformBuffers.scene.mapped, &uboVSscene, sizeof(uboVSscene));
 	}