AnimTestbed/3rdparty/imgui-node-editor/examples/blueprints-example/utilities/drawing.cpp

253 lines
9.2 KiB
C++
Raw Normal View History

# define IMGUI_DEFINE_MATH_OPERATORS
# include "drawing.h"
# include <imgui_internal.h>
void ax::Drawing::DrawIcon(ImDrawList* drawList, const ImVec2& a, const ImVec2& b, IconType type, bool filled, ImU32 color, ImU32 innerColor)
{
auto rect = ImRect(a, b);
auto rect_x = rect.Min.x;
auto rect_y = rect.Min.y;
auto rect_w = rect.Max.x - rect.Min.x;
auto rect_h = rect.Max.y - rect.Min.y;
auto rect_center_x = (rect.Min.x + rect.Max.x) * 0.5f;
auto rect_center_y = (rect.Min.y + rect.Max.y) * 0.5f;
auto rect_center = ImVec2(rect_center_x, rect_center_y);
const auto outline_scale = rect_w / 24.0f;
const auto extra_segments = static_cast<int>(2 * outline_scale); // for full circle
if (type == IconType::Flow)
{
const auto origin_scale = rect_w / 24.0f;
const auto offset_x = 1.0f * origin_scale;
const auto offset_y = 0.0f * origin_scale;
const auto margin = (filled ? 2.0f : 2.0f) * origin_scale;
const auto rounding = 0.1f * origin_scale;
const auto tip_round = 0.7f; // percentage of triangle edge (for tip)
//const auto edge_round = 0.7f; // percentage of triangle edge (for corner)
const auto canvas = ImRect(
rect.Min.x + margin + offset_x,
rect.Min.y + margin + offset_y,
rect.Max.x - margin + offset_x,
rect.Max.y - margin + offset_y);
const auto canvas_x = canvas.Min.x;
const auto canvas_y = canvas.Min.y;
const auto canvas_w = canvas.Max.x - canvas.Min.x;
const auto canvas_h = canvas.Max.y - canvas.Min.y;
const auto left = canvas_x + canvas_w * 0.5f * 0.3f;
const auto right = canvas_x + canvas_w - canvas_w * 0.5f * 0.3f;
const auto top = canvas_y + canvas_h * 0.5f * 0.2f;
const auto bottom = canvas_y + canvas_h - canvas_h * 0.5f * 0.2f;
const auto center_y = (top + bottom) * 0.5f;
//const auto angle = AX_PI * 0.5f * 0.5f * 0.5f;
const auto tip_top = ImVec2(canvas_x + canvas_w * 0.5f, top);
const auto tip_right = ImVec2(right, center_y);
const auto tip_bottom = ImVec2(canvas_x + canvas_w * 0.5f, bottom);
drawList->PathLineTo(ImVec2(left, top) + ImVec2(0, rounding));
drawList->PathBezierCubicCurveTo(
ImVec2(left, top),
ImVec2(left, top),
ImVec2(left, top) + ImVec2(rounding, 0));
drawList->PathLineTo(tip_top);
drawList->PathLineTo(tip_top + (tip_right - tip_top) * tip_round);
drawList->PathBezierCubicCurveTo(
tip_right,
tip_right,
tip_bottom + (tip_right - tip_bottom) * tip_round);
drawList->PathLineTo(tip_bottom);
drawList->PathLineTo(ImVec2(left, bottom) + ImVec2(rounding, 0));
drawList->PathBezierCubicCurveTo(
ImVec2(left, bottom),
ImVec2(left, bottom),
ImVec2(left, bottom) - ImVec2(0, rounding));
if (!filled)
{
if (innerColor & 0xFF000000)
drawList->AddConvexPolyFilled(drawList->_Path.Data, drawList->_Path.Size, innerColor);
drawList->PathStroke(color, true, 2.0f * outline_scale);
}
else
drawList->PathFillConvex(color);
}
else
{
auto triangleStart = rect_center_x + 0.32f * rect_w;
auto rect_offset = -static_cast<int>(rect_w * 0.25f * 0.25f);
rect.Min.x += rect_offset;
rect.Max.x += rect_offset;
rect_x += rect_offset;
rect_center_x += rect_offset * 0.5f;
rect_center.x += rect_offset * 0.5f;
if (type == IconType::Circle)
{
const auto c = rect_center;
if (!filled)
{
const auto r = 0.5f * rect_w / 2.0f - 0.5f;
if (innerColor & 0xFF000000)
drawList->AddCircleFilled(c, r, innerColor, 12 + extra_segments);
drawList->AddCircle(c, r, color, 12 + extra_segments, 2.0f * outline_scale);
}
else
{
drawList->AddCircleFilled(c, 0.5f * rect_w / 2.0f, color, 12 + extra_segments);
}
}
if (type == IconType::Square)
{
if (filled)
{
const auto r = 0.5f * rect_w / 2.0f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, color, 0, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, color, 0, 15);
#endif
}
else
{
const auto r = 0.5f * rect_w / 2.0f - 0.5f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
if (innerColor & 0xFF000000)
{
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, innerColor, 0, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, innerColor, 0, 15);
#endif
}
#if IMGUI_VERSION_NUM > 18101
drawList->AddRect(p0, p1, color, 0, ImDrawFlags_RoundCornersAll, 2.0f * outline_scale);
#else
drawList->AddRect(p0, p1, color, 0, 15, 2.0f * outline_scale);
#endif
}
}
if (type == IconType::Grid)
{
const auto r = 0.5f * rect_w / 2.0f;
const auto w = ceilf(r / 3.0f);
const auto baseTl = ImVec2(floorf(rect_center_x - w * 2.5f), floorf(rect_center_y - w * 2.5f));
const auto baseBr = ImVec2(floorf(baseTl.x + w), floorf(baseTl.y + w));
auto tl = baseTl;
auto br = baseBr;
for (int i = 0; i < 3; ++i)
{
tl.x = baseTl.x;
br.x = baseBr.x;
drawList->AddRectFilled(tl, br, color);
tl.x += w * 2;
br.x += w * 2;
if (i != 1 || filled)
drawList->AddRectFilled(tl, br, color);
tl.x += w * 2;
br.x += w * 2;
drawList->AddRectFilled(tl, br, color);
tl.y += w * 2;
br.y += w * 2;
}
triangleStart = br.x + w + 1.0f / 24.0f * rect_w;
}
if (type == IconType::RoundSquare)
{
if (filled)
{
const auto r = 0.5f * rect_w / 2.0f;
const auto cr = r * 0.5f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, color, cr, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, color, cr, 15);
#endif
}
else
{
const auto r = 0.5f * rect_w / 2.0f - 0.5f;
const auto cr = r * 0.5f;
const auto p0 = rect_center - ImVec2(r, r);
const auto p1 = rect_center + ImVec2(r, r);
if (innerColor & 0xFF000000)
{
#if IMGUI_VERSION_NUM > 18101
drawList->AddRectFilled(p0, p1, innerColor, cr, ImDrawFlags_RoundCornersAll);
#else
drawList->AddRectFilled(p0, p1, innerColor, cr, 15);
#endif
}
#if IMGUI_VERSION_NUM > 18101
drawList->AddRect(p0, p1, color, cr, ImDrawFlags_RoundCornersAll, 2.0f * outline_scale);
#else
drawList->AddRect(p0, p1, color, cr, 15, 2.0f * outline_scale);
#endif
}
}
else if (type == IconType::Diamond)
{
if (filled)
{
const auto r = 0.607f * rect_w / 2.0f;
const auto c = rect_center;
drawList->PathLineTo(c + ImVec2( 0, -r));
drawList->PathLineTo(c + ImVec2( r, 0));
drawList->PathLineTo(c + ImVec2( 0, r));
drawList->PathLineTo(c + ImVec2(-r, 0));
drawList->PathFillConvex(color);
}
else
{
const auto r = 0.607f * rect_w / 2.0f - 0.5f;
const auto c = rect_center;
drawList->PathLineTo(c + ImVec2( 0, -r));
drawList->PathLineTo(c + ImVec2( r, 0));
drawList->PathLineTo(c + ImVec2( 0, r));
drawList->PathLineTo(c + ImVec2(-r, 0));
if (innerColor & 0xFF000000)
drawList->AddConvexPolyFilled(drawList->_Path.Data, drawList->_Path.Size, innerColor);
drawList->PathStroke(color, true, 2.0f * outline_scale);
}
}
else
{
const auto triangleTip = triangleStart + rect_w * (0.45f - 0.32f);
drawList->AddTriangleFilled(
ImVec2(ceilf(triangleTip), rect_y + rect_h * 0.5f),
ImVec2(triangleStart, rect_center_y + 0.15f * rect_h),
ImVec2(triangleStart, rect_center_y - 0.15f * rect_h),
color);
}
}
}