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 Support color of points in a point cloud 
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Joined: Tue Apr 19, 2011 3:35 pm
Posts: 5
Location: Bremen, Germany
Post Support color of points in a point cloud
Hi,
would it be possible to let have points in GLC_Pointclouds to have a per vertex color?

You could just interleave the color data with the vertex data in the internal buffer:

Code:
//first some data structure for my points
typedef struct
{
   float pos[3];
   float color[3];
   inline float x() const { return pos[0]; }
   inline float y() const { return pos[1]; }
   inline float z() const { return pos[2]; }
   inline float r() const { return color[0]; }
   inline float g() const { return color[1]; }
   inline float b() const { return color[2]; }
} Point;

//get my points from somewhere
Point pointArray[numOfPoints] = getMyPoints();

//create GLC_Pointcloud
GLfloatVector v(numOfPoints * 6);
for (int i = 0; i < numOfPoints; i++)
{
     v << pointArray[i].x() << pointArray[i].y() << pointArray[i].z() << pointArray[i].r() << pointArray[i].g() << pointArray[i].b();
}
GLC_3DViewInstance pointCloud(GLC_Factory::instance()->createPointCloud(v)); //material not needed anymore?

//add to world etc.
....


Then you would probably just have to enable the corresponding client state and set the offset when rendering the point cloudsin GLC_Wiredata::glDraw(..):
Code:
if (GL_POINTS==mode)
{
    glEnableClientState(GL_COLOR_ARRAY);
    glColorPointer(3, GL_FLOAT, 3, BUFFER_OFFSET(12));
}


That feature would be very appreciated :-)

Thanks,
Frederic


Thu May 26, 2011 8:18 pm
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