private void DrawEdges(Mesh m, Effect effect, Matrix world, Matrix view, Matrix projection)
{
foreach (var edge in m.HalfEdges.Where(a => a.Primary))
{
var start = edge.Twin.End.Position;
var end = edge.End.Position;
Vector3 position = start * 0.5f + end * 0.5f;
Vector3 difference = end - start;
float length = difference.Length();
Matrix scale = Matrix.CreateScale(new Vector3(0.2f, length, 0.2f));
difference.Normalize();
Matrix rotation = Matrix.Identity;
Vector3 axis = Vector3.Cross(Vector3.Up, difference);
if (axis != Vector3.Zero)
{
axis.Normalize();
float angle = (float)Math.Acos(Vector3.Dot(Vector3.Up, difference));
rotation = Matrix.CreateFromAxisAngle(axis, (float.IsNaN(angle) ? 0 : angle));
}
Matrix myWorld = scale * rotation * Matrix.CreateTranslation(position) * world;
effect.Parameters["World"].SetValue(myWorld);
effect.Parameters["WorldViewProj"].SetValue(myWorld * view * projection);
if (effect.Parameters["DiffuseColor"] != null)
{
effect.Parameters["DiffuseColor"].SetValue(Color.Green.ToVector4());
}
cylinder.Draw(effect);
}
}
public static void DrawHitPoly()
{
if (HitVertices == null)
{
return;
}
if (PickResult.PhysicsObj?.IsDestroyed ?? false)
{
ClearSelection();
return;
}
var rs = new RasterizerState();
rs.CullMode = Microsoft.Xna.Framework.Graphics.CullMode.None;
rs.FillMode = FillMode.WireFrame;
GraphicsDevice.RasterizerState = rs;
if (SphereTransforms == null && CylinderTransforms == null && PhysicsVertices == null)
{
Effect.CurrentTechnique = Effect.Techniques["Picker"];
foreach (var pass in Effect.CurrentTechnique.Passes)
{
pass.Apply();
GraphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.LineList, HitVertices, 0, HitVertices.Length, HitIndices, 0, HitIndices.Length / 2);
}
}
else
{
if (SphereTransforms != null)
{
foreach (var sphereTransform in SphereTransforms)
{
SpherePrimitive.Draw(sphereTransform, Camera.ViewMatrix, Camera.ProjectionMatrix, Color.Orange);
}
}
if (CylinderTransforms != null)
{
foreach (var cylinderTransform in CylinderTransforms)
{
CylinderPrimitive.Draw(cylinderTransform, Camera.ViewMatrix, Camera.ProjectionMatrix, Color.Orange);
}
}
if (PhysicsVertices != null)
{
Effect.CurrentTechnique = Effect.Techniques["Picker"];
foreach (var pass in Effect.CurrentTechnique.Passes)
{
pass.Apply();
GraphicsDevice.DrawUserIndexedPrimitives(PrimitiveType.LineList, PhysicsVertices, 0, PhysicsVertices.Length, PhysicsIndices, 0, PhysicsIndices.Length / 2);
}
}
}
if (RenderLinks != null)
{
if (!RenderLinks.Head.WorldObject.PhysicsObj.IsDestroyed)
{
RenderLinks.Draw();
}
else
{
RenderLinks.Dispose();
RenderLinks = null;
}
}
}
public override void Draw(GameTime gameTime, Matrix world, Camera camera, Vector3 light1Position, Vector3 light2Position)
{
world = GetWorldMatrix(world);
base.Draw(gameTime, world, camera, light1Position, light2Position);
_cylinder.Draw(world, Color, camera, light1Position, light2Position, Texture, Options);
}
