public static void TraceRay(Camera camera)
{
// pixel postion in the normalized sensor space [0;1]^2
Vector2 texCoord = new Vector2(0.0f, 0.0f);
// pixel corner in camera space
// TODO: offset to pixel center or jitter the pixel area
Vector3 pixelPos = new Vector3(
(0.5f - texCoord.X) * camera.SensorSize.X,
(0.5f - texCoord.Y) * camera.SensorSize.Y,
camera.SensorZ);
//Vector3 colorSum = Vector3(0.0, 0.0, 0.0);
//iVector2 steps = iVector2(3, 3);
float apertureRadius = camera.Lens.ApertureRadius;
//float apertureRadius = 0.0001f;
//Vector2 offsetStep = (2.0 * apertureRadius) * Vector2(1.0 / Vector2(steps - iVector2(1, 1)));
//for (int y = 0; y < steps.y; y++) {
//for (int x = 0; x < steps.x; x++) {
//Vector3 lensOffset = Vector3(
//float(x) * offsetStep.x - apertureRadius,
//float(y) * offsetStep.y - apertureRadius, 0.0);
Vector3 lensOffset = new Vector3(apertureRadius, apertureRadius, 0);
//Vector3 lensOffset = Vector3(0, 0, 0);
//Vector3 rayDirection = lensOffset - pixelPos;
Vector3 rayDirection = ThinLensTransformPoint(pixelPos, camera.Lens.FocalLength) - lensOffset;
rayDirection /= rayDirection.Z; // normalize to a unit z step
Vector3 startCamera = lensOffset + (-camera.Near) * rayDirection;
// convert the start and end points to from [-1;1]^3 to [0;1]^3
Vector3 start = TransformPoint(camera.Perspective, startCamera);
start = BigToSmallCube(start);
Vector3 endCamera = lensOffset + (-camera.Far) * rayDirection;
Vector3 end = TransformPoint(camera.Perspective, endCamera);
end = BigToSmallCube(end);
//colorSum += intersectHeightField(start, end);
//}
//}
}
public Navigation()
{
Camera = new Camera();
ResetNavigation();
}
private void ComputeSensorTransform(Camera camera)
{
sensorTransform = Matrix4.Identity;
if (Math.Abs(camera.SensorRotation.X) > 0)
{
sensorTransform *= Matrix4.CreateRotationX(camera.SensorRotation.X);
}
if (Math.Abs(camera.SensorRotation.Y) > 0)
{
sensorTransform *= Matrix4.CreateRotationY(camera.SensorRotation.Y);
}
sensorTransform3x3 = Matrix4x4To3x3Array(sensorTransform, ref sensorTransform3x3);
}
public void ResetCamera()
{
float aspectRatio = Camera.AspectRatio;
Camera = new Camera();
Camera.AspectRatio = aspectRatio;
}
