//! Direction of viewing ray in right-bottom corner.
uniform vec3 uDirectRB;
+//! Inverse model-view-projection matrix.
+uniform mat4 uInvModelProj;
//! Texture buffer of data records of high-level BVH nodes.
uniform isamplerBuffer uSceneNodeInfoTexture;
//! Texture buffer of minimum points of high-level BVH nodes.
//! Environment map texture.
uniform sampler2D uEnvironmentMapTexture;
+//! Input pre-raytracing image rendered by OpenGL.
+uniform sampler2D uOpenGlColorTexture;
+//! Input pre-raytracing depth image rendered by OpenGL.
+uniform sampler2D uOpenGlDepthTexture;
+
//! Total number of light sources.
uniform int uLightCount;
//! Intensity of global ambient light.
vec3 aD0 = mix (uDirectLB, uDirectRB, thePixel.x);
vec3 aD1 = mix (uDirectLT, uDirectRT, thePixel.x);
-
- return SRay (mix (aP0, aP1, thePixel.y),
- mix (aD0, aD1, thePixel.y));
+
+ vec3 aDirection = normalize (mix (aD0, aD1, thePixel.y));
+
+ return SRay (mix (aP0, aP1, thePixel.y), aDirection);
+
+}
+
+// =======================================================================
+// function : ComputeOpenGlDepth
+// purpose :
+// =======================================================================
+float ComputeOpenGlDepth (in SRay theRay)
+{
+ // a depth in range [0,1]
+ float anOpenGlDepth = texelFetch (uOpenGlDepthTexture, ivec2 (gl_FragCoord.xy), 0).r;
+ // pixel point in NDC-space [-1,1]
+ vec4 aPoint = vec4 (2.0f * vPixel.x - 1.0f,
+ 2.0f * vPixel.y - 1.0f,
+ 2.0f * anOpenGlDepth - 1.0f,
+ 1.0f);
+ vec4 aFinal = uInvModelProj * aPoint;
+ aFinal.xyz *= 1.f / aFinal.w;
+
+ return (anOpenGlDepth < 1.f) ? length (aFinal.xyz - theRay.Origin) : MAXFLOAT;
+}
+
+// =======================================================================
+// function : ComputeOpenGlColor
+// purpose :
+// =======================================================================
+vec4 ComputeOpenGlColor (in SRay theRay)
+{
+ vec4 anOpenGlColor = texelFetch (uOpenGlColorTexture, ivec2 (gl_FragCoord.xy), 0);
+ // During blending with factors GL_SRC_ALPHA and GL_ONE_MINUS_SRC_ALPHA (for text and markers)
+ // the alpha channel (written in the color buffer) was squared.
+ anOpenGlColor.a = 1.f - sqrt (anOpenGlColor.a);
+
+ return anOpenGlColor;
}
// =======================================================================
if (aTime < theHit.Time)
{
aTriIndex = aTriangle;
-
+
theHit = SIntersect (aTime, aParams, aNormal);
}
}
(anIndex * aNdotI + (aNdotI < 0.0f ? aNdotT : -aNdotT)) * theNormal);
}
+#define MIN_SLOPE 0.0001f
+#define EPS_SCALE 8.0000f
+
#define THRESHOLD vec3 (0.1f)
#define LIGHT_POS(index) (2 * index + 1)
vec4 aWeight = vec4 (1.0f);
int anObjectId;
-
+
+ float anOpenGlDepth = ComputeOpenGlDepth (theRay);
+
+ vec3 aViewDir = theRay.Direct;
+
for (int aDepth = 0; aDepth < TRACE_DEPTH; ++aDepth)
{
SIntersect aHit = SIntersect (MAXFLOAT, vec2 (ZERO), ZERO);
-
+
ivec4 aTriIndex = SceneNearestHit (theRay, theInverse, aHit, anObjectId);
if (aTriIndex.x == -1)
{
if (aWeight.w != 0.0f)
{
+ if (anOpenGlDepth < MAXFLOAT)
+ {
+ vec4 anOpenGlColor = ComputeOpenGlColor (theRay);
+ aResult.xyz += aWeight.xyz * anOpenGlColor.xyz;
+ aWeight.w *= anOpenGlColor.w;
+ }
return vec4 (aResult.x,
aResult.y,
aResult.z,
aResult.z,
aWeight.w);
}
+
+ aHit.Normal = normalize (aHit.Normal);
+
+ if (anOpenGlDepth != MAXFLOAT)
+ {
+ float aDepthSlope = dot (theRay.Direct, aHit.Normal);
+
+ // For polygons that are parallel to the screen plane, the depth slope
+ // is equal to 1, resulting in small polygon offset. For polygons that
+ // that are at a large angle to the screen, the depth slope tends to 1,
+ // resulting in a larger polygon offset
+ float aPolygonOffset = uSceneEpsilon * EPS_SCALE / max (MIN_SLOPE, abs (aDepthSlope));
+ if (anOpenGlDepth - aPolygonOffset < aHit.Time)
+ {
+ vec4 aColor = ComputeOpenGlColor (theRay);
+
+ aResult.xyz += aWeight.xyz * aColor.xyz;
+ aWeight *= aColor.w;
+
+ if (all (lessThanEqual (aWeight.xyz, THRESHOLD)))
+ {
+ return vec4 (aResult.x,
+ aResult.y,
+ aResult.z,
+ aWeight.w);
+ }
+ }
+ }
+
vec3 aPoint = theRay.Direct * aHit.Time + theRay.Origin;
vec3 aAmbient = texelFetch (
aNormal = normalize (MatrixRowMultiplyDir (
aNormal, aInvTransf0, aInvTransf1, aInvTransf2));
-
- aHit.Normal = normalize (aHit.Normal);
-
+
for (int aLightIdx = 0; aLightIdx < uLightCount; ++aLightIdx)
{
vec4 aLight = texelFetch (
if (aOpacity.x != 1.0f)
{
aWeight *= aOpacity.y;
-
+
if (aOpacity.z != 1.0f)
{
theRay.Direct = Refract (theRay.Direct, aNormal, aOpacity.z, aOpacity.w);
theInverse = 1.0f / max (abs (theRay.Direct), SMALL);
-
+
theInverse.x = theRay.Direct.x < 0.0f ? -theInverse.x : theInverse.x;
theInverse.y = theRay.Direct.y < 0.0f ? -theInverse.y : theInverse.y;
theInverse.z = theRay.Direct.z < 0.0f ? -theInverse.z : theInverse.z;
-
- aPoint += aHit.Normal * (dot (aHit.Normal, theRay.Direct) >= 0.0f ? uSceneEpsilon : -uSceneEpsilon);
+
+ aPoint += aHit.Normal * (dot (aHit.Normal, theRay.Direct) >= 0.0f ? uSceneEpsilon : -uSceneEpsilon);
+
+ // Disable combining image with OpenGL output
+ anOpenGlDepth = MAXFLOAT;
+ }
+ else
+ {
+ anOpenGlDepth -= aHit.Time + uSceneEpsilon;
}
}
else
if (dot (theRay.Direct, aHit.Normal) < 0.0f)
{
- theRay.Direct = reflect (theRay.Direct, aHit.Normal);
+ theRay.Direct = reflect (theRay.Direct, aHit.Normal);
}
theInverse = 1.0f / max (abs (theRay.Direct), SMALL);
theInverse.z = theRay.Direct.z < 0.0f ? -theInverse.z : theInverse.z;
aPoint += aHit.Normal * (dot (aHit.Normal, theRay.Direct) >= 0.0f ? uSceneEpsilon : -uSceneEpsilon);
+
+ // Disable combining image with OpenGL output
+ anOpenGlDepth = MAXFLOAT;
}
if (all (lessThanEqual (aWeight.xyz, THRESHOLD)))
projects / occt.git / blobdiff