From 8fc90afcfee19dee4fb6dc1d0a5bcc80ac1132c7 Mon Sep 17 00:00:00 2001
From: hyzboy <hyzboy@gmail.com>
Date: Fri, 14 Jun 2019 19:01:53 +0800
Subject: [PATCH] add c_gbuffer shader

---
 res/shader/c_gbuffer.frag    | 28 +++++++++++++++++++++++++
 res/shader/c_gbuffer.vert    | 40 ++++++++++++++++++++++++++++++++++++
 res/shader/shader_compile.sh |  5 ++++-
 3 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 res/shader/c_gbuffer.frag
 create mode 100644 res/shader/c_gbuffer.vert

diff --git a/res/shader/c_gbuffer.frag b/res/shader/c_gbuffer.frag
new file mode 100644
index 00000000..71c1b6fb
--- /dev/null
+++ b/res/shader/c_gbuffer.frag
@@ -0,0 +1,28 @@
+#version 450 core
+
+layout (binding = 1) uniform sampler2D samplerAlbedo;
+layout (binding = 2) uniform sampler2D samplerNormalMap;
+
+layout(location = 0) in vec3 FragmentColor;
+layout(location = 1) in vec3 FragmentNormal;
+layout(location = 2) in vec3 FragmentTangent;
+layout(location = 3) in vec3 FragmentWorldPos;
+layout(location = 4) in vec2 FragmentTexCoord;
+
+layout (location = 0) out vec4 FragAlbedo;
+layout (location = 1) out vec4 FragNormal;
+layout (location = 2) out vec4 FragWorldPos;
+
+void main()
+{
+    FragWorldPos=vec4(FragmentWorldPos,1.0);    
+    FragAlbedo  =texture(samplerAlbedo,FragmentTexCoord)*vec4(FragmentColor,1.0);
+    
+    vec3 N = normalize(FragmentNormal);
+    N.y = -N.y;
+    vec3 T = normalize(FragmentTangent);
+    vec3 B = cross(N, T);
+    mat3 TBN = mat3(T, B, N);
+    vec3 tnorm = TBN * normalize(texture(samplerNormalMap, FragmentTexCoord).xyz * 2.0 - vec3(1.0));
+    FragNormal = vec4(tnorm, 1.0);
+}
\ No newline at end of file
diff --git a/res/shader/c_gbuffer.vert b/res/shader/c_gbuffer.vert
new file mode 100644
index 00000000..49d471ae
--- /dev/null
+++ b/res/shader/c_gbuffer.vert
@@ -0,0 +1,40 @@
+#version 450 core
+
+layout(location = 0) in vec3 Vertex;
+layout(location = 1) in vec3 Color;
+layout(location = 2) in vec3 Normal;
+layout(location = 3) in vec3 Tangent;
+layout(location = 4) in vec2 TexCoord;
+
+layout(binding = 0) uniform WorldMatrix
+{
+    mat4 two_dim;
+    mat4 projection;
+    mat4 modelview;
+    mat4 mvp;
+    mat3 normal;
+} world;
+
+layout(push_constant) uniform Consts {
+    mat4 local_to_world;
+} pc;
+
+layout(location = 0) out vec3 FragmentColor;
+layout(location = 1) out vec3 FragmentNormal;
+layout(location = 2) out vec3 FragmentTangent;
+layout(location = 3) out vec3 FragmentWorldPos;
+layout(location = 4) out vec2 FragmentTexCoord;
+
+void main()
+{
+    FragmentColor=Color;
+    FragmentWorldPos=vec3(vec4(Vertex,1.0)*pc.local_to_world);
+    FragmentTexCoord=TexCoord;    
+    FragmentTexCoord.t=1.0-TexCoord.t;
+
+    mat3 mNormal=transpose(inverse(mat3(pc.local_to_world)));
+    FragmentNormal=mNormal*normalize(Normal);
+    FragmentTangent=mNormal*normalize(Tangent);
+
+    gl_Position=vec4(Vertex,1.0)*world.mvp;
+}
diff --git a/res/shader/shader_compile.sh b/res/shader/shader_compile.sh
index 0ee8b39b..a1fe1cb9 100755
--- a/res/shader/shader_compile.sh
+++ b/res/shader/shader_compile.sh
@@ -7,4 +7,7 @@ glslangValidator -V -o FlatTexture.vert.spv FlatTexture.vert
 glslangValidator -V -o FlatTexture.frag.spv FlatTexture.frag
 
 glslangValidator -V -o PositionColor3D.vert.spv PositionColor3D.vert
-glslangValidator -V -o OnlyPosition3D.vert.spv OnlyPosition3D.vert
\ No newline at end of file
+glslangValidator -V -o OnlyPosition3D.vert.spv OnlyPosition3D.vert
+
+glslangValidator -V -o c_gbuffer.vert.spv c_gbuffer.vert
+glslangValidator -V -o c_gbuffer.frag.spv c_gbuffer.frag
\ No newline at end of file