using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OpenTK;
namespace SphereTracing
{
public class Camera
{
public Scene BaseScene { get; set; }
public Vector3 Position { get; set; }
private float FovX;
private float FovY;
private float TanFovX;
private float TanFovY;
public Camera(Scene sc)
{
BaseScene = sc;
SetFov(MathHelper.PiOver4);
}
public void SetFov(float fov)
{
float width, height;
width = (float)BaseScene.Renderer.Width;
height = (float)BaseScene.Renderer.Height;
FovX = fov;
FovY = height / width * FovX;
TanFovX = (float)Math.Tan(FovX);
TanFovY = (float)Math.Tan(FovY);
}
public float GetFov()
{
return FovX;
}
public Ray GetRay(int x, int y)
{
Ray r = new Ray();
float width, height;
width = BaseScene.Renderer.Width;
height = BaseScene.Renderer.Height;
float dx = (2 * x - width) / width * TanFovX;
float dy = (2 * y - height) / height * TanFovY;
r.Position = this.Position;
r.Direction = new Vector3(dx, dy, -1.0f);
r.Direction = Vector3.Normalize(r.Direction);
return r;
}
}
}
You are ray-marching, not ray-tracing, so your rays die after a certain distance travelled (as far as I can guess - you haven't mentioned what you do with your rays) so that would explain the arcing horizon. A perspective projection cannot by definition cause straight lines to appear curved, so the curved horizon doesn't come from the camera - as far as I can tell anyway, the camera code looks fine, although the camera position and direction are hardcoded.
The position isn't hardcoded, there is no rotation. To rotate a camera I have to multiply the ray direction vector by rotation matrix, right?
@edit And yes, I increased the max distance from 100 to 1000, and the plane is now flat. Thanks for the help.[/quote]
You are welcome. Was your original question about field of view solved too, though?
You are welcome. Was your original question about field of view solved too, though?
