src/graphics/dimensions.cpp - master - Team8/kittycad

src/graphics/dimensions.cpp
91 строка2 KB
levovix
add: drawing linear dimensions for parameters
11 янв 2026, 03:08
11 янв 2026, 03:08c09faff
#include "./dimensions.h"

#include "mb_axis3d.h"

#include <QPainter>
#include <QPainterPath>
#include <QVector2D>
#include <QApplication>

#include "data/c3dobject.h"

#include "gui/strings.h"


void drawArrow(
	data::DrawContext& ctx,
	Point3 point,
	Vec3 direction,
	Vec3 normal
) {
	auto p0 = ctx.point_worldToQScreen(point);
	auto p1 = ctx.point_worldToQScreen(point - Vec3(direction).Rotate(MbAxis3D(normal), M_PI/8));
	auto p2 = ctx.point_worldToQScreen(point - Vec3(direction).Rotate(MbAxis3D(normal), -M_PI/8));
	QPainterPath path(p0);
	path.lineTo(p1);
	path.lineTo(p2);
	ctx.p->fillPath(path, ctx.p->brush());
}

void drawArrowEnds(
	data::DrawContext& ctx,
	Point3 startPoint,
	Point3 endPoint,
	bool inner,
	Vec3 normal,
	double size
) {
	drawArrow(ctx, startPoint, (inner ? endPoint - startPoint : startPoint - endPoint).GetNormalized() * size, normal);
	drawArrow(ctx, endPoint, (inner ? startPoint - endPoint : endPoint - startPoint).GetNormalized() * size, normal);
}

void drawLinearDim(
	data::DrawContext& ctx,
	Point3 startPoint,
	Point3 endPoint,
	Vec3 axis,
	Vec3 offset,
	std::string_view text_std,
	double arrowSize
) {
  ctx.p->setPen(QPen(QBrush("#EB7964"), 1));
  ctx.p->setBrush(QBrush("#EB7964"));

  auto text = toQString(text_std);

	ctx.p->drawLine(
		ctx.point_worldToQScreen(startPoint),
		ctx.point_worldToQScreen(startPoint + offset)
	);
	
	auto dimline = projectToAxis(endPoint - startPoint, axis);
	
	ctx.p->drawLine(
		ctx.point_worldToQScreen(startPoint + offset),
		ctx.point_worldToQScreen(startPoint + offset + dimline)
	);

	auto endOffset = -projectToAxis(endPoint - (startPoint + offset), offset);
	
	ctx.p->drawLine(
		ctx.point_worldToQScreen(endPoint),
		ctx.point_worldToQScreen(endPoint + endOffset)
	);
	
	ctx.p->drawLine(
		ctx.point_worldToQScreen(endPoint + endOffset),
		ctx.point_worldToQScreen(startPoint + offset + dimline)
	);
	
	auto dimline_p1 = startPoint + offset;
	auto dimline_p2 = startPoint + offset + dimline;

	drawArrowEnds(ctx, dimline_p1, dimline_p2, false, crossProduct(offset, dimline), arrowSize);

	auto textBlockSize = QFontMetrics{QApplication::font()}.boundingRect(text);
	auto textCoord = ctx.point_worldToQScreen(dimline_p1 + (dimline_p2 - dimline_p1) / 2);
	
	ctx.p->translate(textCoord);
	ctx.p->drawText(-textBlockSize.width() / 2., -4, text);
	ctx.p->translate(-textCoord);
}