41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
// Copyright 2024 Bytedance Inc. All Rights Reserved.
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// Author: tianlei.richard@qq.com (tianlei.richard)
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#include "triangle.h"
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#include <algorithm>
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Triangle::Triangle(const PointType &a, const PointType &b, const PointType &c)
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: points_({HomoPointType{a[0], a[1], a[2], 1},
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HomoPointType{b[0], b[1], b[2], 1},
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HomoPointType{c[0], c[1], c[2], 1}}),
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aabb_(calculate_aabb(points_[0], points_[1], points_[2])) {}
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Triangle::Triangle(const HomoPointType &a, const HomoPointType &b,
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const HomoPointType &c)
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: points_({a, b, c}),
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aabb_(calculate_aabb(points_[0], points_[1], points_[2])) {}
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Triangle::BBoxType Triangle::calculate_aabb(const HomoPointType &a,
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const HomoPointType &b,
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const HomoPointType &c) {
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const int x_min = std::min({a.x(), b.x(), c.x()});
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const int y_min = std::min({a.y(), b.y(), c.y()});
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const int x_max = std::max({a.x(), b.x(), c.x()});
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const int y_max = std::max({a.y(), b.y(), c.y()});
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return BBoxType{x_min, y_min, (x_max - x_min), (y_max - y_min)};
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}
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Triangle::BBoxType Triangle::axis_align_bbox() const { return aabb_; }
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void Triangle::affine_transform(const AffineTransformType &m) {
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for (auto &p : points_) {
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p = m * p;
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}
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}
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void Triangle::projective_transform(const ProjectiveTransformType &m) {
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for (auto &p : points_) {
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p = m * p;
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}
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}
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