public static void InitializeGraphics(GraphicsDevice graphicsDevice,
Triangle[] triangles,
Guid id)
{
var basicEffect = new BasicEffect(graphicsDevice)
{
LightingEnabled = false,
VertexColorEnabled = false
};
var index = 0;
var vertices = new VertexPositionColor[triangles.SelectMany(i => i.Points).Count()];
foreach (var point in triangles.SelectMany(triangle => triangle.Points))
vertices[index++] = new VertexPositionColor(new Vector3(point.X,
point.Y,
point.Z),
Color.White);
var vertexBuffer = new VertexBuffer(graphicsDevice,
typeof (VertexPositionColor),
vertices.Length,
BufferUsage.None);
vertexBuffer.SetData(vertices);
Subscriptions.Add(id, new RendererHelperData
{
BasicEffect = basicEffect,
VertexBuffer = vertexBuffer
});
}
public void VertexInsideBoundingSphereCheck()
{
var transform = Matrix.CreateScale(3.0f)*Matrix.CreateRotationY(MathHelper.PiOver4);
var sphere = new BoundingSphere(Vector3.Zero, 1.0f);
var transformedSphere = sphere.Transform(transform);
var triangleOut = new Triangle(new Vector3(2.1f, 2.1f, 0.0f),
new Vector3(2.1f, 0.0f, 0.0f),
new Vector3(4.2f, 2.1f, 0.0f),
String.Empty);
Assert.False(triangleOut.HasAtLeastOnPointInsideBoundingSphere(sphere));
var transformedTriangleOut = new Triangle(Vector3.Transform(triangleOut.Point0, transform),
Vector3.Transform(triangleOut.Point1, transform),
Vector3.Transform(triangleOut.Point2, transform),
String.Empty);
Assert.False(transformedTriangleOut.HasAtLeastOnPointInsideBoundingSphere(transformedSphere));
var triangleIn = new Triangle(new Vector3(2.1f, 2.1f, 0.0f),
new Vector3(0.9f, 0.0f, 0.0f), // It's in!
new Vector3(4.2f, 2.1f, 0.0f),
String.Empty);
Assert.True(triangleIn.HasAtLeastOnPointInsideBoundingSphere(sphere));
var transformedTriangleIn = new Triangle(Vector3.Transform(triangleIn.Point0, transform),
Vector3.Transform(triangleIn.Point1, transform),
Vector3.Transform(triangleIn.Point2, transform),
String.Empty);
Assert.True(transformedTriangleIn.HasAtLeastOnPointInsideBoundingSphere(transformedSphere));
}
public static void Render(GraphicsDevice graphicsDevice,
Matrix view,
Matrix projection,
Matrix world,
Color color,
Triangle[] triangles,
Guid id)
{
var subscription = Subscriptions[id];
graphicsDevice.SetVertexBuffer(subscription.VertexBuffer);
subscription.BasicEffect.World = world;
subscription.BasicEffect.View = view;
subscription.BasicEffect.Projection = projection;
subscription.BasicEffect.DiffuseColor = color.ToVector3();
foreach (var pass in subscription.BasicEffect.CurrentTechnique.Passes)
{
pass.Apply();
graphicsDevice.DrawPrimitives(PrimitiveType.LineList, 0, triangles.Length * 3);
}
}
public ModelData(BoundingBox boundingBox, Triangle[] triangles)
{
_triangles = triangles;
_boundingBox = boundingBox;
}
