private void SampleGraphicsControl_Render(object sender, GraphicsControlEventArgs e)
{
GraphicsContext ctx = e.Context;
GraphicsSurface framebuffer = e.Framebuffer;
if (_AnimationBegin == DateTime.MinValue)
{
_AnimationBegin = DateTime.UtcNow;
}
PerspectiveProjectionMatrix matrixProjection = new PerspectiveProjectionMatrix();
Matrix4x4 matrixView;
// Set projection
matrixProjection.SetPerspective(60.0f, (float)ClientSize.Width / (float)ClientSize.Height, 1.0f, 1000.0f);
// Set view
ModelMatrix matrixViewModel = new ModelMatrix();
matrixViewModel.RotateX(_ViewElevation);
matrixViewModel.RotateY(_ViewAzimuth);
matrixViewModel.Translate(0.0f, 0.0f, _ViewDistance);
matrixView = matrixViewModel.GetInverseMatrix();
_NewtonProgram.Bind(ctx);
_NewtonProgram.SetUniform(ctx, "hal_ModelViewProjection", matrixProjection * matrixView);
_NewtonProgram.SetUniform(ctx, "hal_FrameTimeInterval", (float)(DateTime.UtcNow - _AnimationBegin).TotalSeconds);
_NewtonVertexArray.Draw(ctx, _NewtonProgram);
SwapNewtonVertexArrays();
// Issue another rendering
SampleGraphicsControl.Invalidate();
}
public void TestPerspectiveFrustum()
{
PerspectiveProjectionMatrix projectionMatrix = new PerspectiveProjectionMatrix();
projectionMatrix.SetPerspective(60.0f, 1.0f, 0.5f, 100.0f);
IEnumerable <Plane> planes = Plane.GetFrustumPlanes(projectionMatrix);
foreach (Plane plane in planes)
{
Assert.GreaterOrEqual(plane.GetDistance(-Vertex3f.UnitZ), 0.0f);
}
}
public void TestPerspectiveFrustum()
{
PerspectiveProjectionMatrix projectionMatrix = new PerspectiveProjectionMatrix();
ModelMatrix modelMatrix = new ModelMatrix();
BoundingBox boundingBox;
Vertex3f bboxPosition;
projectionMatrix.SetPerspective(60.0f, 1.0f, 0.5f, 15.0f);
modelMatrix.Translate(new Vertex3f(-1000.0f, 00.0f, 0.0f));
IEnumerable <Plane> planes = Plane.GetFrustumPlanes(projectionMatrix * modelMatrix);
bboxPosition = new Vertex3f(-0.5f, -0.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(-10.5f, -10.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(999.5f, -0.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsFalse(boundingBox.IsClipped(planes));
modelMatrix.SetIdentity();
modelMatrix.RotateY(180.0f);
planes = Plane.GetFrustumPlanes(projectionMatrix * modelMatrix);
bboxPosition = new Vertex3f(-10.5f, -10.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(999.5f, -0.5f, -3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsTrue(boundingBox.IsClipped(planes));
bboxPosition = new Vertex3f(-0.5f, -0.5f, +3.0f);
boundingBox = new BoundingBox(bboxPosition, bboxPosition + Vertex3f.One);
Assert.IsFalse(boundingBox.IsClipped(planes));
}