public override void MakePhoton(ref GIRend.Photon p)
{
p.position = transform.TransformPoint(new Vector3(Random.value - 0.5f, Random.value - 0.5f, 0f));
// construct a random direction within cone angle
float azimuth = Random.value * Mathf.PI * 2f;
float altitude = Random.value * _coneAngleDeg * Mathf.Deg2Rad;
Vector3 local;
local.x = Mathf.Cos(azimuth) * Mathf.Sin(altitude);
local.y = Mathf.Sin(azimuth) * Mathf.Sin(altitude);
local.z = Mathf.Sqrt(1f - local.x * local.x - local.y * local.y);
p.next_dir = local.x * transform.right + local.y * transform.up - local.z * transform.forward;
Color col;
if (_texture != null)
{
Vector3 localPos = transform.InverseTransformPoint(p.position);
Vector3 uv = localPos + 0.5f * Vector3.one;
uv.z = 0f;
col = intensity * _texture.GetPixelBilinear(uv.x, uv.y);
}
else
{
col = intensity * _light.color;
}
p.intensity = new Vector3(col.r, col.g, col.b);
}
public override void MakePhoton(ref GIRend.Photon p)
{
p.position = transform.position;
// construct a random direction within cone angle
float azimuth = Random.value * Mathf.PI * 2f;
float altitude = Random.value * _coneAngleDeg * Mathf.Deg2Rad;
Vector3 local;
local.x = Mathf.Cos(azimuth) * Mathf.Sin(altitude);
local.y = Mathf.Sin(azimuth) * Mathf.Sin(altitude);
local.z = Mathf.Sqrt(1f - local.x * local.x - local.y * local.y);
p.next_dir = local.x * transform.right + local.y * transform.up + local.z * transform.forward;
float dotmin = Mathf.Cos(0.5f * _light.spotAngle * Mathf.Deg2Rad);
do
{
p.next_dir = Random.onUnitSphere;
}while(Vector3.Dot(transform.forward, p.next_dir) <= dotmin);
Color col = intensity * _light.color;
p.intensity = new Vector3(col.r, col.g, col.b);
}
public override void MakePhoton(ref GIRend.Photon p)
{
Vector3 off = Random.onUnitSphere;
p.position = transform.position + _radius * off;
p.next_dir = Random.onUnitSphere;
if (Vector3.Dot(p.next_dir, off) < 0f)
{
p.next_dir = -p.next_dir;
}
Color col = intensity * _light.color;
p.intensity = new Vector3(col.r, col.g, col.b);
}
public void Hit(ref GIRend.Photon p, ref RaycastHit hit, out Color existingRadiance)
{
Vector3 local = transform.InverseTransformPoint(hit.point);
Vector3 uv = local + 0.5f * Vector3.one;
uv.z = 0f;
int x = Mathf.FloorToInt(uv.x * _texture.width);
int y = Mathf.FloorToInt(uv.y * _texture.height);
int index = y * _texture.height + x;
index = Mathf.Clamp(index, 0, pixels.Length - 1);
existingRadiance = pixels[index];
pixels[index].r += p.intensity.x;
pixels[index].g += p.intensity.y;
pixels[index].b += p.intensity.z;
pixels[index].a = 255;
}
public abstract void MakePhoton(ref GIRend.Photon p);
