Pixels not occluding
- From: Lionel <Lionel@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 28 Jun 2005 08:13:14 -0700
I'm trying to learn Managed DirectX by writing a simple little program that
displays two spheres. I then experiment by altering lighting, moving the
camera around, translating the spheres, etc. I seem to be having a problem
pixel occlusion that I can't find a solution to anywhere in the
documentation. Here's what I've done:
-I initialize the graphics as follows:
public void InitializeGraphics()
{
//Set the presentation parameters:
PresentParameters presentParams = new PresentParameters();
presentParams.Windowed = true;
presentParams.SwapEffect = SwapEffect.Discard;
presentParams.EnableAutoDepthStencil = true;
presentParams.AutoDepthStencilFormat = DepthFormat.D16;
//Now create the device:
device = new Device(0, DeviceType.Hardware, this,
CreateFlags.SoftwareVertexProcessing, presentParams);
//Set the lighting conditions:
device.Lights[0].Type = LightType.Directional;
device.Lights[0].Diffuse = Color.White;
device.Lights[0].Direction = new Vector3(0,0,1.0f);
device.Lights[0].Commit();
device.Lights[0].Enabled = true;
}
-Then I set up my camera:
private void SetupCamera()
{
//Set the view transform:
device.Transform.View = Matrix.LookAtLH(new Vector3(0,0,-36.0f), new
Vector3(),
new Vector3(0,1,0));
//Set the projection transform:
device.Transform.Projection = Matrix.PerspectiveFovLH( (float)Math.PI/4,
(float)this.Width/(float)this.Height, 0.0f, 100.0f);
}
-I create two functions that create spheres with different properties :
private void DrawSphere1(float radius, float X, float Y, float Z)
{
//Create the sphere1 mesh:
Mesh mesh = Mesh.Sphere(device,radius,52,52);
//Apply the mesh material:
Material sphere1Material = new Material();
sphere1Material.Ambient = Color.Blue;
sphere1Material.Diffuse = Color.Blue;
device.Material = sphere1Material;
//Translate sphere1 to the XYZ coords arguments:
device.Transform.World = Matrix.Translation(X,Y,Z);
mesh.DrawSubset(0);
}
private void DrawSphere2(float radius, float X, float Y, float Z)
{
//Create the sphere2 mesh:
Mesh mesh = Mesh.Sphere(device,radius,52,52);
//Apply the mesh material:
Material sphere2Material = new Material();
sphere2Material.Ambient = Color.White;
sphere2Material.Diffuse = Color.White;
device.Material = sphere2Material;
//Translate the sphere to the XYZ coords:
device.Transform.World = Matrix.Translation(X,Y,Z);
mesh.DrawSubset(0);
}
-Finally in my paint event handler I have:
//Clear the device and display a solid color:
device.Clear(ClearFlags.Target |
ClearFlags.ZBuffer,System.Drawing.Color.CornflowerBlue, 1.0f, 0);
//Setup the camera:
this.SetupCamera();
//Draw the spheres:
device.BeginScene();
DrawSphere1(3.0f,0,0,0);
DrawSphere2(3.0f,1.5f,0,0);
device.EndScene();
device.Present();
When the spheres are drawn, they appear semitransparent i.e. I am able to
partially see one through the other. Shouldn't one be completely occluded?
I feel I might not be using "mesh.DrawSubset(...)" properly...is this the
case? As always, thanks in advance everyone!
.
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