Demo: Custom Rendering: better demonstrate PathArcTo(), PathBezierQuadraticCurveTo(), PathBezierCubicCurveTo(), PathStroke(), PathFillConvex() functions.
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@ -55,6 +55,8 @@ Other changes:
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drawn too low, particularly visible with tables that have no scrolling. (#6917)
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- ProgressBar: Fixed a minor tesselation issue when rendering rounded progress bars,
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where in some situations the rounded section wouldn't follow regular tesselation rules.
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- Demo: Custom Rendering: better demonstrate PathArcTo(), PathBezierQuadraticCurveTo(),
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PathBezierCubicCurveTo(), PathStroke(), PathFillConvex() functions.
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-----------------------------------------------------------------------
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3
imgui.h
3
imgui.h
@ -2765,7 +2765,8 @@ struct ImDrawList
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IMGUI_API void AddImageRounded(ImTextureID user_texture_id, const ImVec2& p_min, const ImVec2& p_max, const ImVec2& uv_min, const ImVec2& uv_max, ImU32 col, float rounding, ImDrawFlags flags = 0);
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// Stateful path API, add points then finish with PathFillConvex() or PathStroke()
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// - Filled shapes must always use clockwise winding order. The anti-aliasing fringe depends on it. Counter-clockwise shapes will have "inward" anti-aliasing.
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// - Important: filled shapes must always use clockwise winding order! The anti-aliasing fringe depends on it. Counter-clockwise shapes will have "inward" anti-aliasing.
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// so e.g. 'PathArcTo(center, radius, PI * -0.5f, PI)' is ok, whereas 'PathArcTo(center, radius, PI, PI * -0.5f)' won't have correct anti-aliasing when followed by PathFillConvex().
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inline void PathClear() { _Path.Size = 0; }
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inline void PathLineTo(const ImVec2& pos) { _Path.push_back(pos); }
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inline void PathLineToMergeDuplicate(const ImVec2& pos) { if (_Path.Size == 0 || memcmp(&_Path.Data[_Path.Size - 1], &pos, 8) != 0) _Path.push_back(pos); }
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@ -8030,6 +8030,9 @@ static void ShowExampleAppCustomRendering(bool* p_open)
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const float rounding = sz / 5.0f;
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const int circle_segments = circle_segments_override ? circle_segments_override_v : 0;
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const int curve_segments = curve_segments_override ? curve_segments_override_v : 0;
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const ImVec2 cp3[3] = { ImVec2(0.0f, sz * 0.6f), ImVec2(sz * 0.5f, -sz * 0.4f), ImVec2(sz, sz) }; // Control points for curves
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const ImVec2 cp4[4] = { ImVec2(0.0f, 0.0f), ImVec2(sz * 1.3f, sz * 0.3f), ImVec2(sz - sz * 1.3f, sz - sz * 0.3f), ImVec2(sz, sz) };
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float x = p.x + 4.0f;
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float y = p.y + 4.0f;
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for (int n = 0; n < 2; n++)
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@ -8048,17 +8051,23 @@ static void ShowExampleAppCustomRendering(bool* p_open)
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draw_list->AddLine(ImVec2(x, y), ImVec2(x, y + sz), col, th); x += spacing; // Vertical line (note: drawing a filled rectangle will be faster!)
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draw_list->AddLine(ImVec2(x, y), ImVec2(x + sz, y + sz), col, th); x += sz + spacing; // Diagonal line
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// Path
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draw_list->PathArcTo(ImVec2(x + sz*0.5f, y + sz*0.5f), sz*0.5f, 3.141592f, 3.141592f * -0.5f);
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draw_list->PathStroke(col, ImDrawFlags_None, th);
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x += sz + spacing;
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// Quadratic Bezier Curve (3 control points)
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ImVec2 cp3[3] = { ImVec2(x, y + sz * 0.6f), ImVec2(x + sz * 0.5f, y - sz * 0.4f), ImVec2(x + sz, y + sz) };
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draw_list->AddBezierQuadratic(cp3[0], cp3[1], cp3[2], col, th, curve_segments); x += sz + spacing;
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draw_list->AddBezierQuadratic(ImVec2(x + cp3[0].x, y + cp3[0].y), ImVec2(x + cp3[1].x, y + cp3[1].y), ImVec2(x + cp3[2].x, y + cp3[2].y), col, th, curve_segments);
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x += sz + spacing;
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// Cubic Bezier Curve (4 control points)
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ImVec2 cp4[4] = { ImVec2(x, y), ImVec2(x + sz * 1.3f, y + sz * 0.3f), ImVec2(x + sz - sz * 1.3f, y + sz - sz * 0.3f), ImVec2(x + sz, y + sz) };
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draw_list->AddBezierCubic(cp4[0], cp4[1], cp4[2], cp4[3], col, th, curve_segments);
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draw_list->AddBezierCubic(ImVec2(x + cp4[0].x, y + cp4[0].y), ImVec2(x + cp4[1].x, y + cp4[1].y), ImVec2(x + cp4[2].x, y + cp4[2].y), ImVec2(x + cp4[3].x, y + cp4[3].y), col, th, curve_segments);
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x = p.x + 4;
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y += sz + spacing;
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}
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// Filled shapes
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draw_list->AddNgonFilled(ImVec2(x + sz * 0.5f, y + sz * 0.5f), sz * 0.5f, col, ngon_sides); x += sz + spacing; // N-gon
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draw_list->AddCircleFilled(ImVec2(x + sz * 0.5f, y + sz * 0.5f), sz * 0.5f, col, circle_segments); x += sz + spacing; // Circle
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draw_list->AddEllipseFilled(ImVec2(x + sz * 0.5f, y + sz * 0.5f), sz * 0.5f, sz * 0.3f, col, -0.3f, circle_segments); x += sz + spacing;// Ellipse
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@ -8070,9 +8079,27 @@ static void ShowExampleAppCustomRendering(bool* p_open)
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draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + sz, y + thickness), col); x += sz + spacing; // Horizontal line (faster than AddLine, but only handle integer thickness)
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draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + thickness, y + sz), col); x += spacing * 2.0f;// Vertical line (faster than AddLine, but only handle integer thickness)
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draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + 1, y + 1), col); x += sz; // Pixel (faster than AddLine)
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// Path
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draw_list->PathArcTo(ImVec2(x + sz * 0.5f, y + sz * 0.5f), sz * 0.5f, 3.141592f * -0.5f, 3.141592f);
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draw_list->PathFillConvex(col);
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x += sz + spacing;
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// Quadratic Bezier Curve (3 control points)
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draw_list->PathLineTo(ImVec2(x + cp3[0].x, y + cp3[0].y));
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draw_list->PathBezierQuadraticCurveTo(ImVec2(x + cp3[1].x, y + cp3[1].y), ImVec2(x + cp3[2].x, y + cp3[2].y), curve_segments);
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draw_list->PathFillConvex(col);
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x += sz + spacing;
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// Cubic Bezier Curve (4 control points): this is concave so not drawing it yet
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//draw_list->PathLineTo(ImVec2(x + cp4[0].x, y + cp4[0].y));
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//draw_list->PathBezierCubicCurveTo(ImVec2(x + cp4[1].x, y + cp4[1].y), ImVec2(x + cp4[2].x, y + cp4[2].y), ImVec2(x + cp4[3].x, y + cp4[3].y), curve_segments);
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//draw_list->PathFillConvex(col);
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//x += sz + spacing;
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draw_list->AddRectFilledMultiColor(ImVec2(x, y), ImVec2(x + sz, y + sz), IM_COL32(0, 0, 0, 255), IM_COL32(255, 0, 0, 255), IM_COL32(255, 255, 0, 255), IM_COL32(0, 255, 0, 255));
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ImGui::Dummy(ImVec2((sz + spacing) * 11.2f, (sz + spacing) * 3.0f));
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ImGui::Dummy(ImVec2((sz + spacing) * 12.2f, (sz + spacing) * 3.0f));
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ImGui::PopItemWidth();
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ImGui::EndTabItem();
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}
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