public static Ray CreatePrime(int x, int y, Scene scene, int sample, float4x2 jitterMatrix)
{
// Determine X and Y
var sensorX = (2f * (x + jitterMatrix[sample][0]) / scene.Width) - 1f;
var sensorY = 1f - (2f * (y + jitterMatrix[sample][1]) / scene.Height);
// Adjust for the aspect ratio
var aspectRatio = (float)scene.Width / (float)scene.Height;
sensorX *= aspectRatio;
// Adjust for the FOV
var fovAdjustment = Hlsl.Tan((scene.Camera.FOV * (MathF.PI / 180f)) / 2f);
sensorX *= fovAdjustment;
sensorY *= fovAdjustment;
#pragma warning disable IDE0017 // Simplify object initialization
var ray = new Ray();
ray.Origin = new Vector3();
ray.Direction = Hlsl.Normalize(new float3(sensorX, sensorY, -1.0f));
#pragma warning restore IDE0017 // Simplify object initialization
return(ray);
}
public void Execute()
{
float exp = Hlsl.Exp(dword * row_major[ThreadIds.X]);
float log = Hlsl.Log(1 + exp);
float s1 = this.cos * exp * this.sin * log;
float t1 = -this.sin * exp * this.cos * log;
float s2 = s1 + this.intensity + Hlsl.Tan(s1 * this.scale);
float t2 = t1 + this.intensity + Hlsl.Tan(t1 * this.scale);
float u2 = this.cos * s2 - this.sin * t2;
float v2 = this.sin * s2 - this.cos * t2;
row_major[ThreadIds.X] = log / dword + float2 + int2x2 + u2 + v2;
}