/// <summary>
/// Render texture with FBO and draw it to memory.
/// </summary>
private void RenderTexWithFBOandDraw()
{
OpenGL gl = openGLControl.OpenGL;
// render to texture
// adjust viewport and projection matrix to texture dimension
gl.Viewport(0, 0, TEXTURE_WIDTH, TEXTURE_HEIGHT);
gl.MatrixMode(OpenGL.GL_PROJECTION);
gl.LoadIdentity();
gl.Perspective(fovy, (double)Width / (double)Height, 0.01f, 100.0);
gl.LookAt(
status.eye.x + status.kinect.x,
status.eye.y + status.kinect.y,
status.eye.z + status.kinect.z,
buildingModelCursor.GetCoordinate().x,
buildingModelCursor.GetCoordinate().y,
buildingModelCursor.GetCoordinate().z,
0, 1, 0
);
// with FBO
// set the rendering destination to FBO
gl.BindFramebufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, framebuffer_name[0]);
gl.MatrixMode(OpenGL.GL_MODELVIEW);
gl.LoadIdentity();
// clear buffer
gl.ClearColor(0, 0, 0, 1);
gl.Clear(OpenGL.GL_COLOR_BUFFER_BIT | OpenGL.GL_DEPTH_BUFFER_BIT);
// start to draw
gl.PushMatrix();
// Load the identity matrix.
gl.Enable(OpenGL.GL_TEXTURE_2D);
drawer.DrawBuildingPart(gl, buildingModelCursor, DrawType.Full);
if (status != null && buildingModelCursor != null)
{
switch (buildingModelCursor.GetBuildingType())
{
case BuildingObjectType.Floor:
drawer.DrawBuildingPart(gl, buildingOutsideModel, DrawType.WireFrame);
drawer.DrawBuildingPart(gl, buildingModelCursor, DrawType.Full);
break;
case BuildingObjectType.Object:
System.Collections.Hashtable childs = buildingModelCursor.Father.GetChilds();
foreach (System.Collections.DictionaryEntry childEntry in buildingModelCursor.Father.GetChilds())
{
BuildingObjectLib3DS child = childEntry.Value as BuildingObjectLib3DS;
if (child != buildingModelCursor)
{
drawer.DrawBuildingPart(gl,
child,
DrawType.WireFrame);
}
else
{
drawer.DrawBuildingPart(gl,
child,
DrawType.Full);
}
}
break;
case BuildingObjectType.Room:
// TODO
case BuildingObjectType.Outside:
case BuildingObjectType.Building:
drawer.DrawBuildingPart(gl, buildingModelCursor, DrawType.Full);
break;
}
}
//drawer.DrawBuildingPart(gl, modelForFun, DrawType.Full);
gl.PopMatrix();
// back to normal window-system-provided framebuffer
gl.BindFramebufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, 0); // unbind
// trigger mipmaps generation explicitly
// NOTE: If GL_GENERATE_MIPMAP is set to GL_TRUE, then glCopyTexSubImage2D()
// triggers mipmap generation automatically. However, the texture attached
// onto a FBO should generate mipmaps manually via glGenerateMipmapEXT().
gl.BindTexture(OpenGL.GL_TEXTURE_2D, texture_name[0]);
gl.GenerateMipmapEXT(OpenGL.GL_TEXTURE_2D);
//gl.TexEnv(OpenGL.GL_TEXTURE_ENV, OpenGL.GL_TEXTURE_ENV_MODE, OpenGL.GL_ADD);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
// TODO: without FBO, maybe need
}