/// <summary>
/// require a PRNG compute buffer for camera.
/// </summary>
/// <param name="width">the buffer width.</param>
/// <param name="height">the buffer height.</param>
/// <returns></returns>
public ComputeBuffer RequirePRNGStates(Camera camera)
{
var id = camera.GetInstanceID();
if (_PRNGStates.TryGetValue(id, out var buffer))
{
return(buffer);
}
buffer = new ComputeBuffer(camera.pixelWidth * camera.pixelHeight, 4 * 4, ComputeBufferType.Structured, ComputeBufferMode.Immutable);
var _mt19937 = new MersenneTwister.MT.mt19937ar_cok_opt_t();
_mt19937.init_genrand((uint)System.DateTime.Now.Ticks);
var data = new uint[camera.pixelWidth * camera.pixelHeight * 4];
for (var i = 0; i < camera.pixelWidth * camera.pixelHeight * 4; ++i)
{
data[i] = _mt19937.genrand_int32();
}
buffer.SetData(data);
_PRNGStates.Add(id, buffer);
return(buffer);
}
//require a PRNG compute buffer for camera.
public ComputeBuffer RequirePRNGStates(Camera vCamera)
{
var CameraId = vCamera.GetInstanceID();
if (_PRNGStates.TryGetValue(CameraId, out var OutBuffer))
{
return(OutBuffer);
}
OutBuffer = new ComputeBuffer(vCamera.pixelWidth * vCamera.pixelHeight, 4 * 4, ComputeBufferType.Structured, ComputeBufferMode.Immutable);
var Mt19937 = new MersenneTwister.MT.mt19937ar_cok_opt_t();
Mt19937.init_genrand((uint)System.DateTime.Now.Ticks);
var Data = new uint[vCamera.pixelWidth * vCamera.pixelHeight * 4];
for (var i = 0; i < vCamera.pixelWidth * vCamera.pixelHeight * 4; ++i)
{
Data[i] = Mt19937.genrand_int32();
}
OutBuffer.SetData(Data);
_PRNGStates.Add(CameraId, OutBuffer);
return(OutBuffer);
}
void CreatePRNGStates()
{
var mapSize = renderTextures[0].width;
PRNGStates = new ComputeBuffer(mapSize * mapSize, 4 * 4, ComputeBufferType.Structured, ComputeBufferMode.Immutable);
var _mt19937 = new MersenneTwister.MT.mt19937ar_cok_opt_t();
_mt19937.init_genrand((uint)System.DateTime.Now.Ticks);
var data = new uint[mapSize * mapSize * 4];
for (var i = 0; i < mapSize * mapSize * 4; ++i)
{
data[i] = _mt19937.genrand_int32();
}
PRNGStates.SetData(data);
}
public static void GenerateScene()
{
var _mt19937 = new MersenneTwister.MT.mt19937ar_cok_opt_t();
_mt19937.init_genrand(95273);
var templateGo = AssetDatabase.LoadAssetAtPath <GameObject>("Assets/Prefabs/Sphere.prefab");
var templateLambertian = AssetDatabase.LoadAssetAtPath <Material>("Assets/Materials/RandomLambertian.mat");
var templateMetal = AssetDatabase.LoadAssetAtPath <Material>("Assets/Materials/RandomMetal.mat");
var templateDielectric = AssetDatabase.LoadAssetAtPath <Material>("Assets/Materials/RandomDielectric.mat");
var renderers = new List <Renderer>();
GameObject go;
Renderer renderer;
Material material;
for (var a = -11; a < 11; ++a)
{
for (var b = -11; b < 11; ++b)
{
var chooseMat = _mt19937.genrand_real1();
var center = new Vector3(a + 0.9f * (float)_mt19937.genrand_real1(), 0.2f, b + 0.9f * (float)_mt19937.genrand_real1());
if ((center - new Vector3(4.0f, 0.2f, 0.0f)).magnitude > 0.9f)
{
if (chooseMat < 0.8)
{
go = GameObject.Instantiate(templateGo);
go.name = $"Sphere_L_{a}_{b}";
go.transform.localPosition = center;
go.transform.localScale = Vector3.one * 0.4f;
renderer = go.GetComponent <Renderer>();
material = new Material(templateLambertian);
material.SetColor(
"_Color",
new Color(
(float)(_mt19937.genrand_real1() * _mt19937.genrand_real1()),
(float)(_mt19937.genrand_real1() * _mt19937.genrand_real1()),
(float)(_mt19937.genrand_real1() * _mt19937.genrand_real1())));
renderer.material = material;
renderers.Add(renderer);
}
else if (chooseMat < 0.95)
{
go = GameObject.Instantiate(templateGo);
go.name = $"Sphere_M_{a}_{b}";
go.transform.localPosition = center;
go.transform.localScale = Vector3.one * 0.4f;
renderer = go.GetComponent <Renderer>();
material = new Material(templateMetal);
material.SetColor(
"_Color",
new Color(
(float)(0.5 * (1.0 + _mt19937.genrand_real1())),
(float)(0.5 * (1.0 + _mt19937.genrand_real1())),
(float)(0.5 * (1.0 + _mt19937.genrand_real1()))));
material.SetFloat("_Fuzz", (float)(0.5 * _mt19937.genrand_real1()));
renderer.material = material;
renderers.Add(renderer);
}
else
{
go = GameObject.Instantiate(templateGo);
go.name = $"Sphere_D_{a}_{b}";
go.transform.localPosition = center;
go.transform.localScale = Vector3.one * 0.4f;
renderer = go.GetComponent <Renderer>();
material = new Material(templateDielectric);
material.SetColor("_Color", Color.white);
material.SetFloat("_IOR", 1.5f);
renderer.material = material;
renderers.Add(renderer);
}
}
}
}
go = GameObject.Instantiate(templateGo);
go.name = "Sphere_D";
go.transform.localPosition = new Vector3(0.0f, 1.0f, 0.0f);
go.transform.localScale = Vector3.one * 2.0f;
renderer = go.GetComponent <Renderer>();
material = new Material(templateDielectric);
material.SetColor("_Color", Color.white);
material.SetFloat("_IOR", 1.5f);
renderer.material = material;
renderers.Add(renderer);
go = GameObject.Instantiate(templateGo);
go.name = "Sphere_L";
go.transform.localPosition = new Vector3(-4.0f, 1.0f, 0.0f);
go.transform.localScale = Vector3.one * 2.0f;
renderer = go.GetComponent <Renderer>();
material = new Material(templateLambertian);
material.SetColor("_Color", new Color(0.4f, 0.2f, 0.1f));
renderer.material = material;
renderers.Add(renderer);
go = GameObject.Instantiate(templateGo);
go.name = "Sphere_M";
go.transform.localPosition = new Vector3(4.0f, 1.0f, 0.0f);
go.transform.localScale = Vector3.one * 2.0f;
renderer = go.GetComponent <Renderer>();
material = new Material(templateMetal);
material.SetColor("_Color", new Color(0.7f, 0.6f, 0.5f));
material.SetFloat("_Fuzz", 0.0f);
renderer.material = material;
renderers.Add(renderer);
SceneManager.Instance.renderers = renderers.ToArray();
}