Long Live Dragon3!

A.k.a. Qt 3D Studio Runtime 2.0

Change-Id: I459564fe47dc3d4b294346a42b1b387c21bb4088
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 69 insertions, 0 deletions

diff --git a/res/effectlib/simpleGlossyBSDF.glsllib b/res/effectlib/simpleGlossyBSDF.glsllib
new file mode 100644
index 0000000..bacd822
--- /dev/null
+++ b/res/effectlib/simpleGlossyBSDF.glsllib
@@ -0,0 +1,69 @@
+vec4 simpleGlossyBSDF( in mat3 tanFrame, in vec3 L, vec3 V, in vec3 lightSpecular, in float ior
+                     , in float roughnessU, in float roughnessV, int mode )
+{
+  vec4 rgba = vec4( 0.0f, 0.0f, 0.0f, 1.0f );
+
+  float cosTheta = dot( tanFrame[2], L );
+  if ( 0.0f < cosTheta )
+  {
+    float roughness = calculateRoughness( tanFrame[2], roughnessU, roughnessV, tanFrame[0] );
+
+    if ( ( mode == scatter_reflect ) || ( mode == scatter_reflect_transmit ) )
+    {
+      vec3 R = reflect( -L, tanFrame[2] );
+      float cosine = dot( R, V );
+      float shine = ( 0.0f < cosine ) ? ( ( 0.0f < roughness ) ? pow( cosine, 1.0f / roughness ) : ( 0.9999f <= cosine ) ? 1.0f : 0.0f ) : 0.0f;
+      rgba.rgb = shine * lightSpecular;
+    }
+  }
+  if ( ( mode == scatter_transmit ) || ( mode == scatter_reflect_transmit ) )
+  {
+    // check against total reflection
+    vec3 R = refract( -V, tanFrame[2], ior );
+    if ( R == vec3( 0.0f, 0.0f, 0.0f ) )
+    {
+      rgba.a = 1.0f;
+    }
+    else
+    {
+      rgba.a = 0.0f;
+    }
+  }
+
+  return( rgba );
+}
+
+vec4 simpleGlossyBSDFEnvironment( in mat3 tanFrame, in vec3 viewDir, in float roughnessU, in float roughnessV, int mode )
+{
+  vec3 rgb = vec3( 0.0f, 0.0f, 0.0f );
+#if !UIC_ENABLE_LIGHT_PROBE
+  if ( uEnvironmentMappingEnabled )
+  {
+    float roughness = calculateRoughness( tanFrame[2], roughnessU, roughnessV, tanFrame[0] );
+    vec3 R = reflect( -viewDir, tanFrame[2] );
+    rgb = evalEnvironmentMap( R, roughness );
+    rgb = simpleGlossyBSDF( tanFrame, R, viewDir, rgb, 1.0f, roughnessU, roughnessV, scatter_reflect ).rgb;
+  }
+#endif
+  return( vec4( rgb, 1.0f ) );
+}
+
+// RNM radiosity normal maps
+vec4 glossyRNM( in vec3 N, in vec3 rnmX, in vec3 rnmY, in vec3 rnmZ )
+{
+  // we use a fixed basis like Half Life
+  vec3 B0 = vec3( -0.40825, 0.70711, 0.57735);
+  vec3 B1 = vec3( -0.40825, -0.70711, 0.57735);
+  vec3 B2 = vec3( 0.8165, 0.0, 0.57735);
+
+  vec3 dp;
+  dp.x = clamp( dot ( N , B0 ), 0.0, 1.0);
+  dp.y = clamp( dot ( N , B1 ), 0.0, 1.0);
+  dp.z = clamp( dot ( N , B2 ), 0.0, 1.0);
+
+  float sum = 1.0 / dot( dp, vec3(1.0, 1.0, 1.0) );
+  vec3 diffuseLight = dp.x * rnmX + dp.y * rnmY + dp.z * rnmZ;
+  //vec3 diffuseLight = N.x * rnmX + N.y * rnmY + N.z * rnmZ;
+
+  return (vec4(diffuseLight, 1.0) * sum);
+}