private void UpdateRaytrace()
{
// make sure the canvas is correct
int newWidth = (int)(Screen.width / _downsampling);
if (_canvasTex == null || _canvasTex.width != newWidth)
{
_canvasTex = new Texture2D(newWidth, (int)(Screen.height / _downsampling));
_canvasTex.filterMode = FilterMode.Point;
}
// get main camera
Camera cam = Camera.main;
// get width and height
int width = _canvasTex.width,
height = _canvasTex.height;
// get z pos
float camZ = cam.transform.position.z;
Color black = Color.black;
// calculate color for each pixel on the canvas
for (float i = 0; i < width; ++i)
{
for (float j = 0; j < height; ++j)
{
// Get Ray from pixel and zpos
Vector3 pos = new Vector3(i / width, j / height, camZ);
Ray ray = cam.ViewportPointToRay(pos);
RaycastHit raycastHitInfo;
bool didHit = Physics.Raycast(ray, out raycastHitInfo);
if (didHit)
{
// get the color from the RayTraceRenderer
RayTraceRenderer comp = raycastHitInfo.collider.GetComponent <RayTraceRenderer>();
if (comp != null)
{
_canvasTex.SetPixel((int)i, (int)j, comp.CalculateColor(raycastHitInfo, _recursionDepth, _ambience, ray));
}
else
{
_canvasTex.SetPixel((int)i, (int)j, black);
}
}
else
{
// otherwise just set the color to black
_canvasTex.SetPixel((int)i, (int)j, black);
}
}
}
_canvasTex.Apply();
}
private Color Bounce(Ray ray, int depth)
{
RaycastHit raycastHitInfo;
if (Physics.Raycast(ray, out raycastHitInfo))
{
RayTraceRenderer comp = raycastHitInfo.collider.GetComponent <RayTraceRenderer>();
if (comp != null)
{
return(comp.CalculateColor(ray, raycastHitInfo, depth - 1));
}
}
return(Color.clear);
}
protected Color Bounce(Ray inRay, int depth, float ambience)
{
if (depth > 0)
{
RaycastHit outHit;
bool hit = Physics.Raycast(inRay, out outHit);
if (hit)
{
RayTraceRenderer renderer = outHit.transform.gameObject.GetComponent <RayTraceRenderer>();
if (renderer)
{
return(renderer.CalculateColor(outHit, --depth, ambience, inRay));
}
}
}
return(Color.clear);
}