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06/04/2017

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--User changes
 -Make all fonts be MS Shell Dlg 2. This will require reloading dark.qss if users are already using it.
 -Limit size of the left side of the palette editor.
 -Disable create from image buttons in the palette editor when working on a fixed palette.

--Bug fixes
 -The following variations were wrong: coshq, cothq.
 -During iteration, the color index could become nan if all xform color speeds were negative. This could lead to bad results on the GPU. Fix to check for nan. Minimal speed difference.

--Code changes
 -Make the following variations safer by using Zeps(): sinq, sinhq, secq, sechq, tanq, tanhq, cosq, coshq, cotq, cothq, cscq, cschq, estiq.
 -Always pass -cl-no-signed-zeros -cl-denorms-are-zero to kernel compiles for both single and double.
 -Flush all denormals to zero for all executable programs. This will likely lead to a speedup for badly behaving programs.
This commit is contained in:
Person
2017-06-04 17:37:29 -07:00
parent 5a8b4b1148
commit 66a597df39
17 changed files with 362 additions and 132 deletions
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146
Source/Ember/Variations04.h
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@ -3126,7 +3126,7 @@ public:
T c = std::cos(helper.In.x);
T sh = std::sinh(absV);
T ch = std::cosh(absV);
T d = m_Weight * c * sh / absV;
T d = m_Weight * c * sh / Zeps(absV);
helper.Out.x = m_Weight * s * ch;
helper.Out.y = d * helper.In.y;
helper.Out.z = d * helper.In.z;
@ -3142,7 +3142,7 @@ public:
<< "\t\treal_t c = cos(vIn.x);\n"
<< "\t\treal_t sh = sinh(absV);\n"
<< "\t\treal_t ch = cosh(absV);\n"
<< "\t\treal_t d = xform->m_VariationWeights[" << varIndex << "] * c * sh / absV;\n"
<< "\t\treal_t d = xform->m_VariationWeights[" << varIndex << "] * c * sh / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = xform->m_VariationWeights[" << varIndex << "] * s * ch;\n"
<< "\t\tvOut.y = d * vIn.y;\n"
@ -3153,7 +3153,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3175,7 +3175,7 @@ public:
T c = std::cos(absV);
T sh = std::sinh(helper.In.x);
T ch = std::cosh(helper.In.x);
T d = m_Weight * ch * s / absV;
T d = m_Weight * ch * s / Zeps(absV);
helper.Out.x = m_Weight * sh * c;
helper.Out.y = d * helper.In.y;
helper.Out.z = d * helper.In.z;
@ -3191,7 +3191,7 @@ public:
<< "\t\treal_t c = cos(absV);\n"
<< "\t\treal_t sh = sinh(vIn.x);\n"
<< "\t\treal_t ch = cosh(vIn.x);\n"
<< "\t\treal_t d = xform->m_VariationWeights[" << varIndex << "] * ch * s / absV;\n"
<< "\t\treal_t d = xform->m_VariationWeights[" << varIndex << "] * ch * s / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = xform->m_VariationWeights[" << varIndex << "] * sh * c;\n"
<< "\t\tvOut.y = d * vIn.y;\n"
@ -3202,7 +3202,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3220,12 +3220,12 @@ public:
virtual void Func(IteratorHelper<T>& helper, Point<T>& outPoint, QTIsaac<ISAAC_SIZE, ISAAC_INT>& rand) override
{
T absV = VarFuncs<T>::Hypot(helper.In.y, helper.In.z);
T ni = m_Weight / (helper.m_PrecalcSumSquares + SQR(helper.In.z));
T ni = m_Weight / Zeps(helper.m_PrecalcSumSquares + SQR(helper.In.z));
T s = std::sin(-helper.In.x);
T c = std::cos(-helper.In.x);
T sh = std::sinh(absV);
T ch = std::cosh(absV);
T d = ni * s * sh / absV;
T d = ni * s * sh / Zeps(absV);
helper.Out.x = c * ch * ni;
helper.Out.y = -(d * helper.In.y);
helper.Out.z = -(d * helper.In.z);
@ -3237,12 +3237,12 @@ public:
intmax_t varIndex = IndexInXform();
ss << "\t{\n"
<< "\t\treal_t absV = Hypot(vIn.y, vIn.z);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / (precalcSumSquares + SQR(vIn.z));\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / Zeps(precalcSumSquares + SQR(vIn.z));\n"
<< "\t\treal_t s = sin(-vIn.x);\n"
<< "\t\treal_t c = cos(-vIn.x);\n"
<< "\t\treal_t sh = sinh(absV);\n"
<< "\t\treal_t ch = cosh(absV);\n"
<< "\t\treal_t d = ni * s * sh / absV;\n"
<< "\t\treal_t d = ni * s * sh / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = c * ch * ni;\n"
<< "\t\tvOut.y = -(d * vIn.y);\n"
@ -3253,7 +3253,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3271,12 +3271,12 @@ public:
virtual void Func(IteratorHelper<T>& helper, Point<T>& outPoint, QTIsaac<ISAAC_SIZE, ISAAC_INT>& rand) override
{
T absV = VarFuncs<T>::Hypot(helper.In.y, helper.In.z);
T ni = m_Weight / (helper.m_PrecalcSumSquares + SQR(helper.In.z));
T ni = m_Weight / Zeps(helper.m_PrecalcSumSquares + SQR(helper.In.z));
T s = std::sin(absV);
T c = std::cos(absV);
T sh = std::sinh(helper.In.x);
T ch = std::cosh(helper.In.x);
T d = ni * sh * s / absV;
T d = ni * sh * s / Zeps(absV);
helper.Out.x = ch * c * ni;
helper.Out.y = -(d * helper.In.y);
helper.Out.z = -(d * helper.In.z);
@ -3288,7 +3288,7 @@ public:
intmax_t varIndex = IndexInXform();
ss << "\t{\n"
<< "\t\treal_t absV = Hypot(vIn.y, vIn.z);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / (precalcSumSquares + SQR(vIn.z));\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / Zeps(precalcSumSquares + SQR(vIn.z));\n"
<< "\t\treal_t s = sin(absV);\n"
<< "\t\treal_t c = cos(absV);\n"
<< "\t\treal_t sh = sinh(vIn.x);\n"
@ -3304,7 +3304,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3323,13 +3323,13 @@ public:
{
T sysz = SQR(helper.In.y) + SQR(helper.In.z);
T absV = std::sqrt(sysz);
T ni = m_Weight / (SQR(helper.In.x) + sysz);
T ni = m_Weight / Zeps(SQR(helper.In.x) + sysz);
T s = std::sin(helper.In.x);
T c = std::cos(helper.In.x);
T sh = std::sinh(absV);
T ch = std::cosh(absV);
T d = c * sh / absV;
T b = -s * sh / absV;
T d = c * sh / Zeps(absV);
T b = -s * sh / Zeps(absV);
T stcv = s * ch;
T nstcv = -stcv;
T ctcv = c * ch;
@ -3345,13 +3345,13 @@ public:
ss << "\t{\n"
<< "\t\treal_t sysz = SQR(vIn.y) + SQR(vIn.z);\n"
<< "\t\treal_t absV = sqrt(sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / (SQR(vIn.x) + sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / Zeps(SQR(vIn.x) + sysz);\n"
<< "\t\treal_t s = sin(vIn.x);\n"
<< "\t\treal_t c = cos(vIn.x);\n"
<< "\t\treal_t sh = sinh(absV);\n"
<< "\t\treal_t ch = cosh(absV);\n"
<< "\t\treal_t d = c * sh / absV;\n"
<< "\t\treal_t b = -s * sh / absV;\n"
<< "\t\treal_t d = c * sh / Zeps(absV);\n"
<< "\t\treal_t b = -s * sh / Zeps(absV);\n"
<< "\t\treal_t stcv = s * ch;\n"
<< "\t\treal_t nstcv = -stcv;\n"
<< "\t\treal_t ctcv = c * ch;\n"
@ -3362,6 +3362,11 @@ public:
<< "\t}\n";
return ss.str();
}
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Zeps" };
}
};
/// <summary>
@ -3379,13 +3384,13 @@ public:
{
T sysz = SQR(helper.In.y) + SQR(helper.In.z);
T absV = std::sqrt(sysz);
T ni = m_Weight / (SQR(helper.In.x) + sysz);
T ni = m_Weight / Zeps(SQR(helper.In.x) + sysz);
T s = std::sin(absV);
T c = std::cos(absV);
T sh = std::sinh(helper.In.x);
T ch = std::cosh(helper.In.x);
T d = ch * s / absV;
T b = sh * s / absV;
T d = ch * s / Zeps(absV);
T b = sh * s / Zeps(absV);
T stcv = sh * c;
T nstcv = -stcv;
T ctcv = c * ch;
@ -3401,13 +3406,13 @@ public:
ss << "\t{\n"
<< "\t\treal_t sysz = SQR(vIn.y) + SQR(vIn.z);\n"
<< "\t\treal_t absV = sqrt(sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / (SQR(vIn.x) + sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / Zeps(SQR(vIn.x) + sysz);\n"
<< "\t\treal_t s = sin(absV);\n"
<< "\t\treal_t c = cos(absV);\n"
<< "\t\treal_t sh = sinh(vIn.x);\n"
<< "\t\treal_t ch = cosh(vIn.x);\n"
<< "\t\treal_t d = ch * s / absV;\n"
<< "\t\treal_t b = sh * s / absV;\n"
<< "\t\treal_t d = ch * s / Zeps(absV);\n"
<< "\t\treal_t b = sh * s / Zeps(absV);\n"
<< "\t\treal_t stcv = sh * c;\n"
<< "\t\treal_t nstcv = -stcv;\n"
<< "\t\treal_t ctcv = c * ch;\n"
@ -3418,6 +3423,11 @@ public:
<< "\t}\n";
return ss.str();
}
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Zeps" };
}
};
/// <summary>
@ -3438,7 +3448,7 @@ public:
T c = std::cos(helper.In.x);
T sh = std::sinh(absV);
T ch = std::cosh(absV);
T d = -m_Weight * s * sh / absV;
T d = -m_Weight * s * sh / Zeps(absV);
helper.Out.x = m_Weight * c * ch;
helper.Out.y = d * helper.In.y;
helper.Out.z = d * helper.In.z;
@ -3454,7 +3464,7 @@ public:
<< "\t\treal_t c = cos(vIn.x);\n"
<< "\t\treal_t sh = sinh(absV);\n"
<< "\t\treal_t ch = cosh(absV);\n"
<< "\t\treal_t d = -xform->m_VariationWeights[" << varIndex << "] * s * sh / absV;\n"
<< "\t\treal_t d = -xform->m_VariationWeights[" << varIndex << "] * s * sh / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = xform->m_VariationWeights[" << varIndex << "] * c * ch;\n"
<< "\t\tvOut.y = d * vIn.y;\n"
@ -3465,7 +3475,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3487,7 +3497,7 @@ public:
T c = std::cos(absV);
T sh = std::sinh(helper.In.x);
T ch = std::cosh(helper.In.x);
T d = -m_Weight * sh * s / absV;
T d = m_Weight * sh * s / Zeps(absV);
helper.Out.x = m_Weight * c * ch;
helper.Out.y = d * helper.In.y;
helper.Out.z = d * helper.In.z;
@ -3503,7 +3513,7 @@ public:
<< "\t\treal_t c = cos(absV);\n"
<< "\t\treal_t sh = sinh(vIn.x);\n"
<< "\t\treal_t ch = cosh(vIn.x);\n"
<< "\t\treal_t d = -xform->m_VariationWeights[" << varIndex << "] * sh * s / absV;\n"
<< "\t\treal_t d = xform->m_VariationWeights[" << varIndex << "] * sh * s / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = xform->m_VariationWeights[" << varIndex << "] * c * ch;\n"
<< "\t\tvOut.y = d * vIn.y;\n"
@ -3514,7 +3524,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3533,13 +3543,13 @@ public:
{
T sysz = SQR(helper.In.y) + SQR(helper.In.z);
T absV = std::sqrt(sysz);
T ni = m_Weight / (SQR(helper.In.x) + sysz);
T ni = m_Weight / Zeps(SQR(helper.In.x) + sysz);
T s = std::sin(helper.In.x);
T c = std::cos(helper.In.x);
T sh = std::sinh(absV);
T ch = std::cosh(absV);
T d = c * sh / absV;
T b = -s * sh / absV;
T d = c * sh / Zeps(absV);
T b = -s * sh / Zeps(absV);
T stcv = s * ch;
T nstcv = -stcv;
T ctcv = c * ch;
@ -3555,13 +3565,13 @@ public:
ss << "\t{\n"
<< "\t\treal_t sysz = SQR(vIn.y) + SQR(vIn.z);\n"
<< "\t\treal_t absV = sqrt(sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / (SQR(vIn.x) + sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / Zeps(SQR(vIn.x) + sysz);\n"
<< "\t\treal_t s = sin(vIn.x);\n"
<< "\t\treal_t c = cos(vIn.x);\n"
<< "\t\treal_t sh = sinh(absV);\n"
<< "\t\treal_t ch = cosh(absV);\n"
<< "\t\treal_t d = c * sh / absV;\n"
<< "\t\treal_t b = -s * sh / absV;\n"
<< "\t\treal_t d = c * sh / Zeps(absV);\n"
<< "\t\treal_t b = -s * sh / Zeps(absV);\n"
<< "\t\treal_t stcv = s * ch;\n"
<< "\t\treal_t nstcv = -stcv;\n"
<< "\t\treal_t ctcv = c * ch;\n"
@ -3572,6 +3582,11 @@ public:
<< "\t}\n";
return ss.str();
}
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Zeps" };
}
};
/// <summary>
@ -3589,19 +3604,19 @@ public:
{
T sysz = SQR(helper.In.y) + SQR(helper.In.z);
T absV = std::sqrt(sysz);
T ni = m_Weight / (SQR(helper.In.x) + sysz);
T ni = m_Weight / Zeps(Sqr(SQR(helper.In.x) + sysz));
T s = std::sin(absV);
T c = std::cos(absV);
T sh = std::sinh(helper.In.x);
T ch = std::cosh(helper.In.x);
T d = ch * s / absV;
T b = sh * s / absV;
T d = ch * s / Zeps(absV);
T b = sh * s / Zeps(absV);
T stcv = sh * c;
T nstcv = -stcv;
T ctcv = ch * c;
helper.Out.x = (stcv * ctcv + d * b * sysz) * ni;
helper.Out.y = -(nstcv * b * helper.In.y + d * helper.In.y * ctcv) * ni;
helper.Out.z = -(nstcv * b * helper.In.z + d * helper.In.z * ctcv) * ni;
helper.Out.x = (stcv * ctcv + d * b * sysz) * ni;
helper.Out.y = (nstcv * b * helper.In.y + d * helper.In.y * ctcv) * ni;
helper.Out.z = (nstcv * b * helper.In.z + d * helper.In.z * ctcv) * ni;
}
virtual string OpenCLString() const override
@ -3611,23 +3626,28 @@ public:
ss << "\t{\n"
<< "\t\treal_t sysz = SQR(vIn.y) + SQR(vIn.z);\n"
<< "\t\treal_t absV = sqrt(sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / (SQR(vIn.x) + sysz);\n"
<< "\t\treal_t ni = xform->m_VariationWeights[" << varIndex << "] / Zeps(Sqr(SQR(vIn.x) + sysz));\n"
<< "\t\treal_t s = sin(absV);\n"
<< "\t\treal_t c = cos(absV);\n"
<< "\t\treal_t sh = sinh(vIn.x);\n"
<< "\t\treal_t ch = cosh(vIn.x);\n"
<< "\t\treal_t d = ch * s / absV;\n"
<< "\t\treal_t b = sh * s / absV;\n"
<< "\t\treal_t d = ch * s / Zeps(absV);\n"
<< "\t\treal_t b = sh * s / Zeps(absV);\n"
<< "\t\treal_t stcv = sh * c;\n"
<< "\t\treal_t nstcv = -stcv;\n"
<< "\t\treal_t ctcv = ch * c;\n"
<< "\n"
<< "\t\tvOut.x = (stcv * ctcv + d * b * sysz) * ni;\n"
<< "\t\tvOut.y = -(nstcv * b * vIn.y + d * vIn.y * ctcv) * ni;\n"
<< "\t\tvOut.z = -(nstcv * b * vIn.z + d * vIn.z * ctcv) * ni;\n"
<< "\t\tvOut.x = (stcv * ctcv + d * b * sysz) * ni;\n"
<< "\t\tvOut.y = (nstcv * b * vIn.y + d * vIn.y * ctcv) * ni;\n"
<< "\t\tvOut.z = (nstcv * b * vIn.z + d * vIn.z * ctcv) * ni;\n"
<< "\t}\n";
return ss.str();
}
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Zeps", "Sqr" };
}
};
/// <summary>
@ -3649,7 +3669,7 @@ public:
T c = std::cos(helper.In.x);
T sh = std::sinh(absV);
T ch = std::cosh(absV);
T d = ni * c * sh / absV;
T d = ni * c * sh / Zeps(absV);
helper.Out.x = s * ch * ni;
helper.Out.y = -(d * helper.In.y);
helper.Out.z = -(d * helper.In.z);
@ -3666,7 +3686,7 @@ public:
<< "\t\treal_t c = cos(vIn.x);\n"
<< "\t\treal_t sh = sinh(absV);\n"
<< "\t\treal_t ch = cosh(absV);\n"
<< "\t\treal_t d = ni * c * sh / absV;\n"
<< "\t\treal_t d = ni * c * sh / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = s * ch * ni;\n"
<< "\t\tvOut.y = -(d * vIn.y);\n"
@ -3677,7 +3697,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3700,7 +3720,7 @@ public:
T c = std::cos(absV);
T sh = std::sinh(helper.In.x);
T ch = std::cosh(helper.In.x);
T d = ni * ch * s / absV;
T d = ni * ch * s / Zeps(absV);
helper.Out.x = sh * c * ni;
helper.Out.y = -(d * helper.In.y);
helper.Out.z = -(d * helper.In.z);
@ -3717,7 +3737,7 @@ public:
<< "\t\treal_t c = cos(absV);\n"
<< "\t\treal_t sh = sinh(vIn.x);\n"
<< "\t\treal_t ch = cosh(vIn.x);\n"
<< "\t\treal_t d = ni * ch * s / absV;\n"
<< "\t\treal_t d = ni * ch * s / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = sh * c * ni;\n"
<< "\t\tvOut.y = -(d * vIn.y);\n"
@ -3728,7 +3748,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3749,7 +3769,7 @@ public:
T e = std::exp(helper.In.x);
T s = std::sin(absV);
T c = std::cos(absV);
T a = e * s / absV;
T a = e * s / Zeps(absV);
helper.Out.x = m_Weight * e * c;
helper.Out.y = m_Weight * a * helper.In.y;
helper.Out.z = m_Weight * a * helper.In.z;
@ -3764,7 +3784,7 @@ public:
<< "\t\treal_t e = exp(vIn.x);\n"
<< "\t\treal_t s = sin(absV);\n"
<< "\t\treal_t c = cos(absV);\n"
<< "\t\treal_t a = e * s / absV;\n"
<< "\t\treal_t a = e * s / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = xform->m_VariationWeights[" << varIndex << "] * e * c;\n"
<< "\t\tvOut.y = xform->m_VariationWeights[" << varIndex << "] * a * vIn.y;\n"
@ -3775,7 +3795,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
};
@ -3796,7 +3816,7 @@ public:
virtual void Func(IteratorHelper<T>& helper, Point<T>& outPoint, QTIsaac<ISAAC_SIZE, ISAAC_INT>& rand) override
{
T absV = VarFuncs<T>::Hypot(helper.In.y, helper.In.z);
T c = m_Weight * std::atan2(absV, helper.In.x) / absV;
T c = m_Weight * std::atan2(absV, helper.In.x) / Zeps(absV);
helper.Out.x = std::log(SQR(helper.In.x) + SQR(absV)) * m_Denom;
helper.Out.y = c * helper.In.y;
helper.Out.z = c * helper.In.z;
@ -3812,7 +3832,7 @@ public:
string denom = "parVars[" + ToUpper(m_Params[i++].Name()) + index;
ss << "\t{\n"
<< "\t\treal_t absV = Hypot(vIn.y, vIn.z);\n"
<< "\t\treal_t c = xform->m_VariationWeights[" << varIndex << "] * atan2(absV, vIn.x) / absV;\n"
<< "\t\treal_t c = xform->m_VariationWeights[" << varIndex << "] * atan2(absV, vIn.x) / Zeps(absV);\n"
<< "\n"
<< "\t\tvOut.x = log(SQR(vIn.x) + SQR(absV)) * " << denom << ";\n"
<< "\t\tvOut.y = c * vIn.y;\n"
@ -3823,7 +3843,7 @@ public:
virtual vector<string> OpenCLGlobalFuncNames() const override
{
return vector<string> { "Hypot" };
return vector<string> { "Hypot", "Zeps" };
}
virtual void Precalc() override

4
Source/Ember/Xform.h
View File

@ -681,6 +681,10 @@ public:
}
outPoint->m_ColorX = iterHelper.m_Color.x + m_DirectColor * (outPoint->m_ColorX - iterHelper.m_Color.x);
if (std::isnan(outPoint->m_ColorX))
outPoint->m_ColorX = 0;
//Has the trajectory of x or y gone either to infinity, or too close to zero?
return BadVal(outPoint->m_X) || BadVal(outPoint->m_Y)/* || BadVal(outPoint->m_Z)*/;
}