CODEWITHSUNDEEP
3dxnamonogame
Caleb Jares
Caleb Jares

Reputation: 6307

MonoGame 3D - Triangles aren't visible when center Y < about -2.0

I have a small code base, and you can see the full code at my current commit on GitHub. I will try to put the relevant code in here. Basically, if I move a triangle's Position, which changes the World matrix, it becomes invisible. Any ideas?

GraphicsDevice.RasterizerState.CullMode = CullMode.None;

this.vertices = new[]
{
    new VertexPositionColor(new Vector3(1.0f, -1.0f, 0.0f), color),
    new VertexPositionColor(new Vector3(-1.0f, -1.0f, 0.0f), color),
    new VertexPositionColor(new Vector3(0.0f, 1.0f, 0.0f), color)
};

this.effect.Projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.PiOver4,
            device.Viewport.AspectRatio, 0.001f, 50.0f);
this.effect.View = Matrix.CreateLookAt(Position, Vector3.Down, Vector3.Forward);
this.effect.World = Matrix.CreateTranslation(entity.Position);

foreach (var pass in this.effect.CurrentTechnique.Passes)
{
    pass.Apply();
    this.device.DrawUserPrimitives(PrimitiveType.TriangleList, this.vertices,
        0, 1);
}

Upvotes: 0

Views: 140

Answers (1)

Caleb Jares
Caleb Jares

Reputation: 6307

The problem ended up being that my far clip was too close to where I was drawing the triangles (I was drawing ON the far clip).

Simple!

Upvotes: 1

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