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Merge pull request #8021 from Robyt3/Envelope-Render-Fixes

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Various fixes for envelope and bezier evaluation
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archimede67 2024-02-26 21:49:34 +00:00 committed by GitHub
parent 7c4d51f111 ecfc18d129
commit 758664c29d
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GPG key ID: B5690EEEBB952194
2 changed files with 18 additions and 28 deletions
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42
src/game/client/render_map.cpp
View file

@ -124,13 +124,6 @@ const CEnvPointBezier *CMapBasedEnvelopePointAccess::GetBezier(int Index) const
return nullptr;
}
static void ValidateFCurve(const vec2 &p0, vec2 &p1, vec2 &p2, const vec2 &p3)
{
// validate the bezier curve
p1.x = clamp(p1.x, p0.x, p3.x);
p2.x = clamp(p2.x, p0.x, p3.x);
}
static double CubicRoot(double x)
{
if(x == 0.0)
@ -143,11 +136,6 @@ static double CubicRoot(double x)
static float SolveBezier(float x, float p0, float p1, float p2, float p3)
{
// check for valid f-curve
// we only take care of monotonic bezier curves, so there has to be exactly 1 real solution
if(!(p0 <= x && x <= p3) || !(p0 <= p1 && p1 <= p3) || !(p0 <= p2 && p2 <= p3))
return 0.0f;
const double x3 = -p0 + 3.0 * p1 - 3.0 * p2 + p3;
const double x2 = 3.0 * p0 - 6.0 * p1 + 3.0 * p2;
const double x1 = -3.0 * p0 + 3.0 * p1;
@ -167,7 +155,7 @@ static float SolveBezier(float x, float p0, float p1, float p2, float p3)
else if(x3 == 0.0)
{
// quadratic
// t * t + b * t +c = 0
// t * t + b * t + c = 0
const double b = x1 / x2;
const double c = x0 / x2;
@ -179,7 +167,7 @@ static float SolveBezier(float x, float p0, float p1, float p2, float p3)
const double t = (-b + SqrtD) / 2.0;
if(0.0 <= t && t <= 1.0001f)
if(0.0 <= t && t <= 1.0001)
return t;
return (-b - SqrtD) / 2.0;
}
@ -213,24 +201,24 @@ static float SolveBezier(float x, float p0, float p1, float p2, float p3)
const double s = CubicRoot(-q);
const double t = 2.0 * s - sub;
if(0.0 <= t && t <= 1.0001f)
if(0.0 <= t && t <= 1.0001)
return t;
return (-s - sub);
}
else
{
// Casus irreductibilis ... ,_,
// Casus irreducibilis ... ,_,
const double phi = std::acos(-q / std::sqrt(-(p * p * p))) / 3.0;
const double s = 2.0 * std::sqrt(-p);
const double t1 = s * std::cos(phi) - sub;
if(0.0 <= t1 && t1 <= 1.0001f)
if(0.0 <= t1 && t1 <= 1.0001)
return t1;
const double t2 = -s * std::cos(phi + pi / 3.0) - sub;
if(0.0 <= t2 && t2 <= 1.0001f)
if(0.0 <= t2 && t2 <= 1.0001)
return t2;
return -s * std::cos(phi - pi / 3.0) - sub;
}
@ -267,7 +255,7 @@ void CRenderTools::RenderEvalEnvelope(const IEnvelopePointAccess *pPoints, std::
{
const CEnvPoint *pCurrentPoint = pPoints->GetPoint(i);
const CEnvPoint *pNextPoint = pPoints->GetPoint(i + 1);
if(TimeMillis >= pCurrentPoint->m_Time && TimeMillis <= pNextPoint->m_Time)
if(TimeMillis >= pCurrentPoint->m_Time && TimeMillis < pNextPoint->m_Time)
{
const float Delta = pNextPoint->m_Time - pCurrentPoint->m_Time;
float a = (float)(TimeMillis - pCurrentPoint->m_Time) / Delta;
@ -300,19 +288,21 @@ void CRenderTools::RenderEvalEnvelope(const IEnvelopePointAccess *pPoints, std::
for(size_t c = 0; c < Channels; c++)
{
// monotonic 2d cubic bezier curve
const vec2 p0 = vec2(pCurrentPoint->m_Time / 1000.0f, fx2f(pCurrentPoint->m_aValues[c]));
const vec2 p3 = vec2(pNextPoint->m_Time / 1000.0f, fx2f(pNextPoint->m_aValues[c]));
const vec2 p0 = vec2(pCurrentPoint->m_Time, fx2f(pCurrentPoint->m_aValues[c]));
const vec2 p3 = vec2(pNextPoint->m_Time, fx2f(pNextPoint->m_aValues[c]));
const vec2 OutTang = vec2(pCurrentPointBezier->m_aOutTangentDeltaX[c], fx2f(pCurrentPointBezier->m_aOutTangentDeltaY[c]));
const vec2 InTang = vec2(pNextPointBezier->m_aInTangentDeltaX[c], fx2f(pNextPointBezier->m_aInTangentDeltaY[c]));
const vec2 OutTang = vec2(pCurrentPointBezier->m_aOutTangentDeltaX[c] / 1000.0f, fx2f(pCurrentPointBezier->m_aOutTangentDeltaY[c]));
const vec2 InTang = -vec2(pNextPointBezier->m_aInTangentDeltaX[c] / 1000.0f, fx2f(pNextPointBezier->m_aInTangentDeltaY[c]));
vec2 p1 = p0 + OutTang;
vec2 p2 = p3 - InTang;
vec2 p2 = p3 + InTang;
// validate bezier curve
ValidateFCurve(p0, p1, p2, p3);
p1.x = clamp(p1.x, p0.x, p3.x);
p2.x = clamp(p2.x, p0.x, p3.x);
// solve x(a) = time for a
a = clamp(SolveBezier(TimeMillis / 1000.0f, p0.x, p1.x, p2.x, p3.x), 0.0f, 1.0f);
a = clamp(SolveBezier(TimeMillis, p0.x, p1.x, p2.x, p3.x), 0.0f, 1.0f);
// value = y(t)
Result[c] = bezier(p0.y, p1.y, p2.y, p3.y, a);

4
src/game/editor/editor.cpp
View file

@ -6639,9 +6639,9 @@ void CEditor::RenderEnvelopeEditor(CUIRect View)
float StepSize = (EndX - StartX) / static_cast<float>(Steps);
ColorRGBA Channels = ColorRGBA(0.0f, 0.0f, 0.0f, 0.0f);
pEnvelope->Eval(StartTime + StepTime, Channels, c + 1);
pEnvelope->Eval(StartTime, Channels, c + 1);
float PrevY = EnvelopeToScreenY(View, Channels[c]);
for(int i = 2; i < Steps; i++)
for(int i = 1; i < Steps; i++)
{
Channels = ColorRGBA(0.0f, 0.0f, 0.0f, 0.0f);
pEnvelope->Eval(StartTime + i * StepTime, Channels, c + 1);