added background and opacity material option

test_assets/TextureFileFormatTests/Readme.md

@@ -2,6 +2,8 @@
 
 This set of assets is intended to test support for loading and rendering basic texture file formats.
 
+The left material for each texture case is not using opacity. The right material is.
+
 ## Screenshot
 
 ![screenshot](screenshots/all_files.png) 

test_assets/TextureFileFormatTests/_scene.usda

@@ -39,10 +39,48 @@ def Xform "Scene" (
  float2 outputs:result
  }
  }
+
+ def Material "MainMaterialWithOpacity"
+ {
+ token outputs:surface.connect = </Scene/Looks/MainMaterialWithOpacity/PbrPreview.outputs:surface>
+
+ def Shader "PbrPreview"
+ {
+ uniform token info:id = "UsdPreviewSurface"
+ color3f inputs:diffuseColor.connect = </Scene/Looks/MainMaterialWithOpacity/Diffuse.outputs:rgb>
+ float inputs:opacity.connect = </Scene/Looks/MainMaterialWithOpacity/Diffuse.outputs:a>
+ token outputs:surface
+ }
+
+ def Shader "Diffuse"
+ {
+ uniform token info:id = "UsdUVTexture"
+ float2 inputs:st.connect = </Scene/Looks/MainMaterialWithOpacity/Primvar.outputs:result>
+ float3 outputs:rgb
+ float outputs:a
+ }
+
+ def Shader "Primvar"
+ {
+ uniform token info:id = "UsdPrimvarReader_float2"
+ string inputs:varname = "st"
+ float2 outputs:result
+ }
+ }
  }
 
  def Xform "Geom"
  {
+ def Mesh "Backgroud"
+ {
+ color3f[] primvars:displayColor = [(0.7, 0, 0.7)] (
+ interpolation = "constant"
+ )
+ int[] faceVertexCounts = [4]
+ int[] faceVertexIndices = [0, 1, 2, 3]
+ point3f[] points = [(-0.1,-0.1,-0.1), (2.2,-0.1,-0.1), (2.2,1.1,-0.1), (-0.1,1.1,-0.1)]
+ }
+
  def Mesh "Plane" (
  prepend apiSchemas = ["MaterialBindingAPI"]
  )
@@ -53,5 +91,16 @@ def Xform "Scene" (
  int[] faceVertexIndices = [0, 1, 2, 3]
  point3f[] points = [(0,0,0), (1,0,0), (1,1,0), (0,1,0)]
  }
+
+ def Mesh "PlaneWithOpacity" (
+ prepend apiSchemas = ["MaterialBindingAPI"]
+ )
+ {
+ rel material:binding = </Scene/Looks/MainMaterialWithOpacity>
+ float2[] primvars:st = [(0, 0), (1, 0), (1, 1), (0, 1)] (interpolation = "vertex")
+ int[] faceVertexCounts = [4]
+ int[] faceVertexIndices = [0, 1, 2, 3]
+ point3f[] points = [(1.1,0,0), (2.1,0,0), (2.1,1,0), (1.1,1,0)]
+ }
  }
 }

test_assets/TextureFileFormatTests/all_files.usda

@@ -48,7 +48,7 @@ def Scope "Scene" (
  }
 
  def Xform "png" {
- double3 xformOp:translate = (2, 0, 0)
+ double3 xformOp:translate = (3, 0, 0)
  uniform token[] xformOpOrder = ["xformOp:translate"]
 
  over "png_grayscale_8bit" (

test_assets/TextureFileFormatTests/jpeg_cmyk_8-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @jpeg_cmyk_8-bit.jpg@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @jpeg_cmyk_8-bit.jpg@
+ }
+ }
  }
 }

test_assets/TextureFileFormatTests/jpeg_grayscale_8-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @jpeg_grayscale_8-bit.jpg@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @jpeg_grayscale_8-bit.jpg@
+ }
+ }
  }
 }

test_assets/TextureFileFormatTests/jpeg_rgb_8-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @jpeg_rgb_8-bit.jpg@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @jpeg_rgb_8-bit.jpg@
+ }
+ }
  }
 }

test_assets/TextureFileFormatTests/png_grayscale_16-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @png_grayscale_16-bit.png@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @png_grayscale_16-bit.png@
+ }
+ }
  }
 }

test_assets/TextureFileFormatTests/png_grayscale_8-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @png_grayscale_8-bit.png@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @png_grayscale_8-bit.png@
+ }
+ }
  }
 }

test_assets/TextureFileFormatTests/png_rgb_16-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @png_rgb_16-bit.png@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @png_rgb_16-bit.png@
+ }
+ }
  }
 }

test_assets/TextureFileFormatTests/png_rgb_32-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @png_rgb_32-bit.png@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @png_rgb_32-bit.png@
+ }
+ }
  }
 }

test_assets/TextureFileFormatTests/png_rgb_8-bit.usda

@@ -22,5 +22,13 @@ over "Scene"
  asset inputs:file = @png_rgb_8-bit.png@
  }
  }
+
+ over "MainMaterialWithOpacity"
+ {
+ over "Diffuse"
+ {
+ asset inputs:file = @png_rgb_8-bit.png@
+ }
+ }
  }
 }