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Bezier Tweaks, fixed parameter order of 3831d50

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This commit is contained in:
omar
2019-12-17 16:24:50 +01:00
parent 3831d50ab9
commit a610f1da52
4 changed files with 27 additions and 21 deletions
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13
imgui_draw.cpp
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@ -917,7 +917,7 @@ ImVec2 ImBezierCalc(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const
return ImVec2(w1*p1.x + w2*p2.x + w3*p3.x + w4*p4.x, w1*p1.y + w2*p2.y + w3*p3.y + w4*p4.y);
}
// Closely mimicked by ClosestPointBezierCasteljau() in imgui.cpp
// Closely mimics BezierClosestPointCasteljauStep() in imgui.cpp
static void PathBezierToCasteljau(ImVector<ImVec2>* path, float x1, float y1, float x2, float y2, float x3, float y3, float x4, float y4, float tess_tol, int level)
{
float dx = x4 - x1;
@ -938,7 +938,6 @@ static void PathBezierToCasteljau(ImVector<ImVec2>* path, float x1, float y1, fl
float x123 = (x12+x23)*0.5f, y123 = (y12+y23)*0.5f;
float x234 = (x23+x34)*0.5f, y234 = (y23+y34)*0.5f;
float x1234 = (x123+x234)*0.5f, y1234 = (y123+y234)*0.5f;
PathBezierToCasteljau(path, x1,y1, x12,y12, x123,y123, x1234,y1234, tess_tol, level+1);
PathBezierToCasteljau(path, x1234,y1234, x234,y234, x34,y34, x4,y4, tess_tol, level+1);
}
@ -949,8 +948,7 @@ void ImDrawList::PathBezierCurveTo(const ImVec2& p2, const ImVec2& p3, const ImV
ImVec2 p1 = _Path.back();
if (num_segments == 0)
{
// Auto-tessellated
PathBezierToCasteljau(&_Path, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, p4.x, p4.y, _Data->CurveTessellationTol, 0);
PathBezierToCasteljau(&_Path, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, p4.x, p4.y, _Data->CurveTessellationTol, 0); // Auto-tessellated
}
else
{
@ -1131,13 +1129,14 @@ void ImDrawList::AddNgonFilled(const ImVec2& center, float radius, ImU32 col, in
PathFillConvex(col);
}
void ImDrawList::AddBezierCurve(const ImVec2& pos0, const ImVec2& cp0, const ImVec2& cp1, const ImVec2& pos1, ImU32 col, float thickness, int num_segments)
// Cubic Bezier takes 4 controls points
void ImDrawList::AddBezierCurve(const ImVec2& p1, const ImVec2& p2, const ImVec2& p3, const ImVec2& p4, ImU32 col, float thickness, int num_segments)
{
if ((col & IM_COL32_A_MASK) == 0)
return;
PathLineTo(pos0);
PathBezierCurveTo(cp0, cp1, pos1, num_segments);
PathLineTo(p1);
PathBezierCurveTo(p2, p3, p4, num_segments);
PathStroke(col, false, thickness);
}