add direction in shader for classification

python/3d/auto_generated/symbols/qgspointcloud3dsymbol.sip.in

@@ -37,7 +37,9 @@ class QgsPointCloud3DSymbol : QgsAbstract3DSymbol /Abstract/
       //! Render the point cloud with a color ramp
       ColorRamp,
       //! Render the RGB colors of the point cloud
-      RgbRendering
+      RgbRendering,
+      //! Render the point cloud with classified colors
+      Classification
     };
 
     QgsPointCloud3DSymbol();

src/3d/shaders/pointcloud.frag

@@ -3,13 +3,14 @@
 uniform bool triangulate;
 
 in float parameter;
+flat in int classParameter;
 
 in vec3 pointColor;
 in vec3 worldPosition; //used when points are triangulated
 in vec3 vertNorm; //used when points are triangulated
 out vec4 color;
 
-// Sets the redering style, 0: unique color, 1: color ramp shader of terrain, 2: color ramp shader of 2D rendering
+// Sets the redering style, 0: unique color, 1: color ramp shader of terrain, 2: color ramp shader of 2D rendering, 3 : RGB, 4 : Classification
 uniform int u_renderingStyle;
 // Sets the unique mesh color
 uniform vec3 u_singleColor;
@@ -86,12 +87,18 @@ vec4 exactColorRamp()
     vec4 colorRampLine = texelFetch( u_colorRampTexture, i, 0 );
     vec3 color=colorRampLine.yzw;
     float value=colorRampLine.x;
-    if ( abs( parameter - value ) < 0.01 )
+    if ( abs( float(parameter) - value ) < 0.01 )
       return vec4( color, 1.0f );
   }
   return vec4(0.0, 0.0, 0.0, 1.0f);
 }
 
+vec4 classification()
+{
+  vec4 colorRampLine = texelFetch( u_colorRampTexture, classParameter - 1, 0 );
+  return vec4(colorRampLine.yzw,1.0);
+}
+
 vec4 colorRamp()
 {
   if (u_colorRampCount<=0)
@@ -130,6 +137,9 @@ void main(void)
   case 3: // RGB
     color = vec4(pointColor, 1.0f);
     break;
+  case 4: // classification
+    color = classification();
+    break;
   }
 
   //Apply light
@@ -138,7 +148,7 @@ void main(void)
       float ambianceFactor=0.15;
       vec3 diffuseColor;
       adModel(worldPosition, vertNorm, diffuseColor);
-      color = vec4(  color.xyz * (diffuseColor+ambianceFactor), 1 );
+      color =vec4( color.xyz * (diffuseColor+ambianceFactor), 1 );
   }
 
 }

src/3d/shaders/pointcloud.vert

@@ -9,29 +9,41 @@ uniform float u_pointSize;
 // used parameter to choose point cloud points color: 0 for height, 1 for classID
 uniform int u_renderingParameter;
 
+uniform int u_renderingStyle;
+
 in vec3 vertexPosition;
 in float vertexParameter;
 in vec3 vertexColor;
 in vec3 vertexNormal; //used when points are triangulated
 
 out float parameter;
+flat out int classParameter;
 out vec3 pointColor;
 out vec3 worldPosition; //used when points are triangulated
 out vec3 vertNorm; //used when points are triangulated
 
 void main(void)
 {
-    //if (abs(cls-5) < 0.1)
-    //    gl_Position = vec4(0,0,0,0);
-    //else
     gl_Position = modelViewProjection * vec4(vertexPosition, 1);
 
-    gl_PointSize = u_pointSize; //5 + vertexPosition.x * 10 + vertexPosition.y * 10;
-    //gl_PointSize = viewportMatrix[1][1] * projectionMatrix[1][1] * 1.0 / gl_Position.w;
-    //gl_PointSize = 100.0;
+    gl_PointSize = u_pointSize;
 
     worldPosition = vec3 (modelMatrix * vec4 (vertexPosition,1));
     vertNorm = vertexNormal;
+
+    switch (u_renderingStyle)
+    {
+    case 0: //  no rendering
+    case 1: // single color
+      break;
+    case 2: // color ramp
       parameter = vertexParameter;
+      break;
+    case 3: // RGB
       pointColor = vertexColor;
+      break;
+    case 4: // classification
+      classParameter = int(vertexParameter);
+      break;
+    }
 }

src/3d/symbols/qgspointcloud3dsymbol.cpp

@@ -572,7 +572,7 @@ QgsColorRampShader QgsClassificationPointCloud3DSymbol::colorRampShader() const
 void QgsClassificationPointCloud3DSymbol::fillMaterial( Qt3DRender::QMaterial *mat )
 {
   const QgsColorRampShader mColorRampShader = colorRampShader();
-  Qt3DRender::QParameter *renderingStyle = new Qt3DRender::QParameter( "u_renderingStyle", QgsPointCloud3DSymbol::ColorRamp );
+  Qt3DRender::QParameter *renderingStyle = new Qt3DRender::QParameter( "u_renderingStyle", QgsPointCloud3DSymbol::Classification );
   mat->addParameter( renderingStyle );
   Qt3DRender::QParameter *pointSizeParameter = new Qt3DRender::QParameter( "u_pointSize", QVariant::fromValue( mPointSize ) );
   mat->addParameter( pointSizeParameter );

src/3d/symbols/qgspointcloud3dsymbol.h

@@ -51,7 +51,9 @@ class _3D_EXPORT QgsPointCloud3DSymbol : public QgsAbstract3DSymbol SIP_ABSTRACT
       //! Render the point cloud with a color ramp
       ColorRamp,
       //! Render the RGB colors of the point cloud
-      RgbRendering
+      RgbRendering,
+      //! Render the point cloud with classified colors
+      Classification
     };
 
     //! Constructor for QgsPointCloud3DSymbol

src/3d/symbols/qgspointcloud3dsymbol_p.cpp

@@ -22,6 +22,7 @@
 #include "qgs3dsymbolregistry.h"
 #include "qgspointcloudattribute.h"
 #include "qgspointcloudrequest.h"
+#include "qgscolorramptexture.h"
 #include "qgs3dmapsettings.h"
 #include "qgspointcloudindex.h"
 #include "qgspointcloudblockrequest.h"