internal void InjectObject(Matrix4x4 viewProj, int kernel, VaporObject obj)
{
if (kernel == -1)
{
return;
}
m_worldBounds.Clear();
obj.GetBounds(transform, m_worldBounds);
Bounds uvBounds = new Bounds(GetUvFromWorld(obj.transform.position, viewProj), Vector3.one * 0.05f);
for (int i = 0; i < m_worldBounds.Count; i++)
{
Vector3 uv = GetUvFromWorld(m_worldBounds[i], viewProj);
uvBounds.Encapsulate(uv);
}
Vector3 min = uvBounds.min;
Vector3 max = uvBounds.max;
m_offset[0] = Mathf.FloorToInt(min.x * m_densityTex.width);
m_offset[1] = Mathf.FloorToInt(min.y * m_densityTex.height);
m_offset[2] = Mathf.FloorToInt(min.z * m_densityTex.volumeDepth);
m_vaporCompute.SetInts("_LightWriteLower", m_offset);
int maxX = Mathf.CeilToInt(max.x * m_densityTex.width);
int maxY = Mathf.CeilToInt(max.y * m_densityTex.height);
int maxZ = Mathf.CeilToInt(max.z * m_densityTex.volumeDepth);
Profiler.BeginSample("Object pass");
m_vaporCompute.DispatchScaled(kernel, maxX - m_offset[0], maxY - m_offset[1], maxZ - m_offset[2]);
Profiler.EndSample();
}
void DoComputeSteps()
{
//TODO: Could switch between eyes? Would slightly blur the fog -> Probably nice
if (Camera.current.stereoEnabled && Camera.current.stereoActiveEye == Camera.MonoOrStereoscopicEye.Right)
{
m_setting = Setting; //Do update default setting if it's null
return;
}
Graphics.ClearRandomWriteTargets();
if (m_instant)
{
m_vaporCompute.SetFloat("_ExponentialWeight", 1.0f);
m_instant = false;
}
else
{
m_vaporCompute.SetFloat("_ExponentialWeight", AveragingSpeed);
}
m_vaporCompute.SetFloat("_TemporalStrength", TemporalStrength);
m_vaporCompute.SetInt("_Frame", Random.Range(0, m_blueNoiseTex.width * m_blueNoiseTex.height));
m_vaporCompute.SetVector("_CameraPos", Camera.current.transform.position);
if (QualitySettings.shadowCascades == 2)
{
m_vaporCompute.SetVector("_ShadowRange", new Vector4(0.0f, 0.5f, 0.0f, 1.0f));
}
else
{
m_vaporCompute.SetVector("_ShadowRange", new Vector4(0.5f, 0.5f));
}
Matrix4x4 v;
if (Camera.current.stereoEnabled)
{
v = m_camera.GetStereoViewMatrix(Camera.StereoscopicEye.Left);
}
else
{
v = m_camera.worldToCameraMatrix;
}
Vector2 jitter = GenerateRandomOffset();
jitter *= (TemporalStrength * 10);
Matrix4x4 p = GetJitteredMatrix(m_camera, jitter);
Matrix4x4 vp = p * v;
//Set VP from old frame for reprojection
Matrix4x4 vpi = vp.inverse;
m_vaporCompute.SetMatrix("_VAPOR_REPROJECT", m_vpMatrixOld * vpi);
m_vaporCompute.SetMatrix("_VAPOR_I_VP", vpi);
m_vaporCompute.SetMatrix("_VAPOR_VP", vp);
m_vpMatrixOld = vp;
//Bind system settings
{
m_res[0] = m_densityTex.width;
m_res[1] = m_densityTex.height;
m_res[2] = m_densityTex.volumeDepth;
m_vaporCompute.SetInts("_VaporResolution", m_res);
m_vaporCompute.SetFloat("_VaporDepthPow", DepthCurvePower);
Shader.SetGlobalFloat("_VaporDepthPow", DepthCurvePower);
float near = m_camera.nearClipPlane;
float far = m_camera.farClipPlane;
Vector4 planeSettings = GetPlaneSettings(near, far);
m_vaporCompute.SetVector("_VaporPlaneSettings", planeSettings);
Shader.SetGlobalVector("_VaporPlaneSettings", planeSettings);
Shader.SetGlobalTexture("_VaporFogTexture", m_integratedTexture);
Shader.SetGlobalMatrix("_VAPOR_I_VP", vpi);
Shader.SetGlobalMatrix("_VAPOR_VP", vp);
float zc0 = 1.0f - far / near;
float zc1 = far / near;
m_vaporCompute.SetVector("_ZBufferParams", new Vector4(zc0, zc1, zc0 / far, zc1 / far));
for (int i = 0; i < 11; ++i)
{
m_vaporCompute.SetTexture(i, "_BlueNoise", m_blueNoiseTex);
}
}
//Bind noise settings
{
Vector4 scale = new Vector4(2.5f, 1.0f, 2.5f);
m_vaporCompute.SetVector("_NoiseWeights", NoiseWeights / (NoiseWeights.x + NoiseWeights.y + NoiseWeights.z));
float colMin = 1.0f - NoiseColorStrength;
float extinctMin = 1.0f - NoiseExtinctionStrength;
m_vaporCompute.SetVector("_NoiseMin", new Vector4(colMin, colMin, colMin, extinctMin));
m_vaporCompute.SetVector("_NoiseFrequency", Vector4.Scale(NoiseFrequency, scale));
m_vaporCompute.SetVector("_NoiseSpeed", Vector4.Scale(Vector4.Scale(NoiseSpeed, scale), NoiseFrequency) * 0.01f);
m_vaporCompute.SetFloat("_NoisePower", NoisePower);
}
//Bind scattering settings
{
//refractive index of nitrogen
const double indexSqr = 1.0002772 * 1.0002772;
const double r = (indexSqr - 1) * (indexSqr - 1) / ((indexSqr + 2) * (indexSqr + 2));
double size = Mathf.Pow(ScatteringIntensity * 1e3f, 1.0f / 6.0f);
float rsize = (float)(r * Math.Pow(size * ScatteringColor.r / 200.0f, 4.0f) * size * size * (1e-18 * 2.5e25));
float gsize = (float)(r * Math.Pow(size * ScatteringColor.g / 200.0f, 4.0f) * size * size * (1e-18 * 2.5e25));
float bsize = (float)(r * Math.Pow(size * ScatteringColor.b / 200.0f, 4.0f) * size * size * (1e-18 * 2.5e25));
Vector3 rayleighBase = new Vector3(rsize, gsize, bsize);
Vector3 rayleighWeight = rayleighBase * Mathf.Pow(2.0f * Mathf.PI, 4.0f) / (Mathf.Pow(2.0f, 6.0f));
Vector3 rayleighCross = rayleighBase * 24 * Mathf.Pow(Mathf.PI, 3.0f);
rayleighCross.x = (float)(Math.Pow(1.0 - rayleighCross.x, 1000));
rayleighCross.y = (float)(Math.Pow(1.0 - rayleighCross.y, 1000));
rayleighCross.z = (float)(Math.Pow(1.0 - rayleighCross.z, 1000));
m_vaporCompute.SetVector("_Rayleigh", rayleighWeight * 1e5f);
m_vaporCompute.SetVector("_RayleighCross", rayleighCross);
m_vaporCompute.SetVector("_MieScatter",
new Vector4(DirectionalScatteringColor.r, DirectionalScatteringColor.g, DirectionalScatteringColor.b,
DirectionalScattering * 0.999f));
m_vaporCompute.SetFloat("_LambertBeerDensity", Setting.Extinction * 0.1f);
float planetSize = 8000;
float atmoRadius = planetSize + AtmosphereThickness;
m_vaporCompute.SetVector("_Atmosphere",
new Vector4(AtmosphereRingPower, AtmosphereRingSize, atmoRadius * atmoRadius, planetSize));
}
Profiler.BeginSample("Write global density");
Setting.Bind(m_vaporCompute, m_densityKernel, BlendToSetting, m_blendTime);
m_vaporCompute.SetTexture(m_densityKernel, "_DensityTextureWrite", m_densityTex);
m_vaporCompute.SetTexture(m_densityKernel, "_NoiseTex", NoiseTexture);
m_vaporCompute.DispatchScaled(m_densityKernel, m_densityTex.width, m_densityTex.height, m_densityTex.volumeDepth);
Profiler.EndSample();
Profiler.BeginSample("Vapor Object Passes");
//If there's no directional -> manual clear light buffer
if (VaporObject.All.Count == 0 || (VaporObject.All[0] as VaporLight) == null ||
(VaporObject.All[0] as VaporLight).LightType != LightType.Directional)
{
SetLightAccum(m_lightClearKernel, false);
m_vaporCompute.DispatchScaled(m_lightClearKernel, m_scatterTex.width, m_scatterTex.height, m_scatterTex.volumeDepth);
}
//Inject vapor objects
for (int index = 0; index < VaporObject.All.Count; index++)
{
VaporObject vap = VaporObject.All[index];
vap.Inject(this, m_vaporCompute, vp);
}
Profiler.EndSample();
Setting.Bind(m_vaporCompute, m_densityKernel, BlendToSetting, m_blendTime);
Profiler.BeginSample("Scattering");
SetLightAccum(m_scatterKernel, true);
m_vaporCompute.SetTexture(m_scatterKernel, "_DensityTexture", m_densityTex);
m_vaporCompute.SetTexture(m_scatterKernel, "_ScatterTextureOld", m_scatterTexOld);
m_vaporCompute.SetTexture(m_scatterKernel, "_ScatterTexture", m_scatterTex);
m_vaporCompute.DispatchScaled(m_scatterKernel, m_scatterTex.width, m_scatterTex.height, m_scatterTex.volumeDepth);
Profiler.EndSample();
Profiler.BeginSample("Integration");
m_vaporCompute.SetTexture(m_integrateKernel, "_IntegratedTexture", m_integratedTexture);
m_vaporCompute.SetTexture(m_integrateKernel, "_ScatterTextureOld", m_scatterTex);
m_vaporCompute.DispatchScaled(m_integrateKernel, m_scatterTex.width, m_scatterTex.height, 1);
Profiler.EndSample();
Profiler.BeginSample("Blit properties");
var temp = m_scatterTex;
m_scatterTex = m_scatterTexOld;
m_scatterTexOld = temp;
Profiler.EndSample();
}