21 lines
730 B
C
21 lines
730 B
C
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// Copyright (c) 2024 Tencent. All rights reserved.
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// Author: eddardliu
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#import <Foundation/Foundation.h>
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static CGFloat Vec2Len(CGPoint v) { return sqrt(v.x * v.x + v.y * v.y); }
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static CGPoint Vec2Mul(CGPoint v, CGFloat k) { return CGPointMake(v.x * k, v.y * k); }
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static CGPoint Vec2AddVector(CGPoint v, CGPoint va) { return CGPointMake(v.x + va.x, v.y + va.y); }
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static CGPoint Vec2AddOffset(CGPoint v, CGFloat k) { return CGPointMake(v.x + k, v.y + k); }
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static CGFloat Vec2Degree(CGPoint v1, CGPoint v2) { return atan2(v2.y, v2.x) - atan2(v1.y, v1.x); }
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static CGPoint Vec2Rotate(CGPoint p, CGFloat r) {
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CGFloat s = sin(r);
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CGFloat c = cos(r);
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return CGPointMake(p.x * c - p.y * s, p.x * s + p.y * c);
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}
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