static GlobalConstantBuffer InitConstantBuffer(MyViewport viewport)
{
GlobalConstantBuffer m_Data = new GlobalConstantBuffer();
Matrix m = MyRender11.Environment.Matrices.Projection;
// ProjectionMatrixInfo
// In matrices generated with D3DXMatrixPerspectiveFovRH
// A = zf/(zn-zf)
// B = zn*zf/(zn-zf)
// C = -1
float A = m.M33;
float B = m.M43;
// Rely on INFs to be generated in case of any divisions by zero
float zNear = B / A;
float zFar = B / (A + 1);
// Some matrices may use negative m00 or m11 terms to flip X/Y axises
float tanHalfFovX = 1 / Math.Abs(m.M11);
float tanHalfFovY = 1 / Math.Abs(m.M22);
// SetDepthLinearizationConstants
const float EPSILON = 1e-6f;
float inverseZNear = Math.Max(1 / zNear, EPSILON);
float inverseZFar = Math.Max(1 / zFar, EPSILON);
m_Data.LinearizeDepthA = inverseZFar - inverseZNear;
m_Data.LinearizeDepthB = inverseZNear;
// SetViewportConstants
m_Data.InverseDepthRangeA = 1f;
m_Data.InverseDepthRangeB = 0f;
m_Data.InputViewportTopLeft.X = viewport.OffsetX;
m_Data.InputViewportTopLeft.Y = viewport.OffsetY;
// SetProjectionConstants
m_Data.UVToViewA.X = 2 * tanHalfFovX;
m_Data.UVToViewA.Y = -2 * tanHalfFovY;
m_Data.UVToViewB.X = -1 * tanHalfFovX;
m_Data.UVToViewB.Y = 1 * tanHalfFovY;
// SetResolutionConstants
m_Data.InvFullResolution.X = 1.0f / viewport.Width;
m_Data.InvFullResolution.Y = 1.0f / viewport.Height;
m_Data.InvQuarterResolution.X = 1.0f / DivUp((int)viewport.Width, 4);
m_Data.InvQuarterResolution.Y = 1.0f / DivUp((int)viewport.Height, 4);
// SetNormalData
m_Data.NormalMatrix = MyRender11.Environment.Matrices.ViewAt0;
m_Data.NormalDecodeScale = 2;
m_Data.NormalDecodeBias = -1;
// SetAORadiusConstants
float radiusInMeters = Math.Max(Params.Radius, EPSILON);
float r = radiusInMeters * METERS_TO_VIEW_SPACE_UNITS;
m_Data.R2 = r * r;
m_Data.NegInvR2 = -1 / m_Data.R2;
m_Data.RadiusToScreen = r * 0.5f / tanHalfFovY * viewport.Height;
float backgroundViewDepth = Math.Max(Params.BackgroundViewDepth, EPSILON);
if (Params.AdaptToFOV)
{
// use larger background view depth for low FOV values (less then 30 degrees)
float factor = Math.Min(1.0f, MyRender11.Environment.Matrices.FovH / MathHelper.ToRadians(30));
backgroundViewDepth = MathHelper.Lerp(6000, backgroundViewDepth, factor);
}
m_Data.BackgroundAORadiusPixels = m_Data.RadiusToScreen / backgroundViewDepth;
float foregroundViewDepth = Math.Max(Params.ForegroundViewDepth, EPSILON);
m_Data.ForegroundAORadiusPixels = m_Data.RadiusToScreen / foregroundViewDepth;
// SetBlurConstants
float BaseSharpness = Math.Max(Params.BlurSharpness, 0);
BaseSharpness /= METERS_TO_VIEW_SPACE_UNITS;
if (Params.BlurSharpnessFunctionEnable)
{
m_Data.BlurViewDepth0 = Math.Max(Params.BlurSharpnessFunctionForegroundViewDepth, 0);
m_Data.BlurViewDepth1 = Math.Max(Params.BlurSharpnessFunctionBackgroundViewDepth, m_Data.BlurViewDepth0 + EPSILON);
m_Data.BlurSharpness0 = BaseSharpness * Math.Max(Params.BlurSharpnessFunctionForegroundScale, 0);
m_Data.BlurSharpness1 = BaseSharpness;
}
else
{
m_Data.BlurSharpness0 = BaseSharpness;
m_Data.BlurSharpness1 = BaseSharpness;
m_Data.BlurViewDepth0 = 0;
m_Data.BlurViewDepth1 = 1;
}
// SetDepthThresholdConstants
if (Params.DepthThresholdEnable)
{
m_Data.ViewDepthThresholdNegInv = -1 / Math.Max(Params.DepthThreshold, EPSILON);
m_Data.ViewDepthThresholdSharpness = Math.Max(Params.DepthThresholdSharpness, 0);
}
else
{
m_Data.ViewDepthThresholdNegInv = 0;
m_Data.ViewDepthThresholdSharpness = 1;
}
// SetAOParameters
m_Data.PowExponent = Math.Min(Math.Max(Params.PowerExponent, 1), 8);
m_Data.NDotVBias = Math.Min(Math.Max(Params.Bias, 0.0f), 0.5f);
float aoAmountScaleFactor = 1 / (1 - m_Data.NDotVBias);
m_Data.SmallScaleAOAmount = Math.Min(Math.Max(Params.SmallScaleAO, 0), 4) * aoAmountScaleFactor * 2;
m_Data.LargeScaleAOAmount = Math.Min(Math.Max(Params.LargeScaleAO, 0), 4) * aoAmountScaleFactor;
return m_Data;
}
static GlobalConstantBuffer InitConstantBuffer(MyViewport viewport)
{
GlobalConstantBuffer m_Data = new GlobalConstantBuffer();
Matrix m = MyRender11.Environment.Matrices.Projection;
// ProjectionMatrixInfo
// In matrices generated with D3DXMatrixPerspectiveFovRH
// A = zf/(zn-zf)
// B = zn*zf/(zn-zf)
// C = -1
float A = m.M33;
float B = m.M43;
// Rely on INFs to be generated in case of any divisions by zero
float zNear = B / A;
float zFar = B / (A + 1);
// Some matrices may use negative m00 or m11 terms to flip X/Y axises
float tanHalfFovX = 1 / Math.Abs(m.M11);
float tanHalfFovY = 1 / Math.Abs(m.M22);
// SetDepthLinearizationConstants
const float EPSILON = 1e-6f;
float inverseZNear = Math.Max(1 / zNear, EPSILON);
float inverseZFar = Math.Max(1 / zFar, EPSILON);
m_Data.LinearizeDepthA = inverseZFar - inverseZNear;
m_Data.LinearizeDepthB = inverseZNear;
// SetViewportConstants
m_Data.InverseDepthRangeA = 1f;
m_Data.InverseDepthRangeB = 0f;
m_Data.InputViewportTopLeft.X = viewport.OffsetX;
m_Data.InputViewportTopLeft.Y = viewport.OffsetY;
// SetProjectionConstants
m_Data.UVToViewA.X = 2 * tanHalfFovX;
m_Data.UVToViewA.Y = -2 * tanHalfFovY;
m_Data.UVToViewB.X = -1 * tanHalfFovX;
m_Data.UVToViewB.Y = 1 * tanHalfFovY;
// SetResolutionConstants
m_Data.InvFullResolution.X = 1.0f / viewport.Width;
m_Data.InvFullResolution.Y = 1.0f / viewport.Height;
m_Data.InvQuarterResolution.X = 1.0f / DivUp((int)viewport.Width, 4);
m_Data.InvQuarterResolution.Y = 1.0f / DivUp((int)viewport.Height, 4);
// SetNormalData
m_Data.NormalMatrix = MyRender11.Environment.Matrices.ViewAt0;
m_Data.NormalDecodeScale = 2;
m_Data.NormalDecodeBias = -1;
// SetAORadiusConstants
float radiusInMeters = Math.Max(Params.Radius, EPSILON);
float r = radiusInMeters * METERS_TO_VIEW_SPACE_UNITS;
m_Data.R2 = r * r;
m_Data.NegInvR2 = -1 / m_Data.R2;
m_Data.RadiusToScreen = r * 0.5f / tanHalfFovY * viewport.Height;
float backgroundViewDepth = Math.Max(Params.BackgroundViewDepth, EPSILON);
m_Data.BackgroundAORadiusPixels = m_Data.RadiusToScreen / backgroundViewDepth;
float foregroundViewDepth = Math.Max(Params.ForegroundViewDepth, EPSILON);
m_Data.ForegroundAORadiusPixels = m_Data.RadiusToScreen / foregroundViewDepth;
// SetBlurConstants
float BaseSharpness = Math.Max(Params.BlurSharpness, 0);
BaseSharpness /= METERS_TO_VIEW_SPACE_UNITS;
if (Params.BlurSharpnessFunctionEnable)
{
m_Data.BlurViewDepth0 = Math.Max(Params.BlurSharpnessFunctionForegroundViewDepth, 0);
m_Data.BlurViewDepth1 = Math.Max(Params.BlurSharpnessFunctionBackgroundViewDepth, m_Data.BlurViewDepth0 + EPSILON);
m_Data.BlurSharpness0 = BaseSharpness * Math.Max(Params.BlurSharpnessFunctionForegroundScale, 0);
m_Data.BlurSharpness1 = BaseSharpness;
}
else
{
m_Data.BlurSharpness0 = BaseSharpness;
m_Data.BlurSharpness1 = BaseSharpness;
m_Data.BlurViewDepth0 = 0;
m_Data.BlurViewDepth1 = 1;
}
// SetDepthThresholdConstants
if (Params.DepthThresholdEnable)
{
m_Data.ViewDepthThresholdNegInv = -1 / Math.Max(Params.DepthThreshold, EPSILON);
m_Data.ViewDepthThresholdSharpness = Math.Max(Params.DepthThresholdSharpness, 0);
}
else
{
m_Data.ViewDepthThresholdNegInv = 0;
m_Data.ViewDepthThresholdSharpness = 1;
}
// SetAOParameters
m_Data.PowExponent = Math.Min(Math.Max(Params.PowerExponent, 1), 8);
m_Data.NDotVBias = Math.Min(Math.Max(Params.Bias, 0.0f), 0.5f);
float aoAmountScaleFactor = 1 / (1 - m_Data.NDotVBias);
m_Data.SmallScaleAOAmount = Math.Min(Math.Max(Params.SmallScaleAO, 0), 4) * aoAmountScaleFactor * 2;
m_Data.LargeScaleAOAmount = Math.Min(Math.Max(Params.LargeScaleAO, 0), 4) * aoAmountScaleFactor;
return(m_Data);
}