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65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/*
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* Apple // emulator for *ix
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*
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* This software package is subject to the GNU General Public License
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* version 3 or later (your choice) as published by the Free Software
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* Foundation.
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*
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* Copyright 2013-2015 Aaron Culliney
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*
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*/
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// Modified sample code from https://developer.apple.com/library/mac/samplecode/GLEssentials/Introduction/Intro.html
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#ifndef __VECTOR_UTIL_H__
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#define __VECTOR_UTIL_H__
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// A Vector is floating point array with either 3 or 4 components
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// functions with the vec4 prefix require 4 elements in the array
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// functions with vec3 prefix require only 3 elements in the array
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// Subtracts one 4D vector to another
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void vec4Add(float *vec, const float *lhs, const float *rhs);
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// Subtracts one 4D vector from another
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void vec4Subtract(float *vec, const float *lhs, const float *rhs);
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// Multiplys one 4D vector by another
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void vec4Multiply(float *vec, const float *lhs, const float *rhs);
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// Divides one 4D vector by another
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void vec4Divide(float *vec, const float *lhs, const float *rhs);
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// Subtracts one 4D vector to another
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void vec3Add(float *vec, const float *lhs, const float *rhs);
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// Subtracts one 4D vector from another
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void vec3Subtract(float *vec, const float *lhs, const float *rhs);
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// Multiplys one 4D vector by another
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void vec3Multiply(float *vec, const float *lhs, const float *rhs);
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// Divides one 4D vector by another
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void vec3Divide(float *vec, const float *lhs, const float *rhs);
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// Calculates the Cross Product of a 3D vector
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void vec3CrossProduct(float *vec, const float *lhs, const float *rhs);
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// Normalizes a 3D vector
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void vec3Normalize(float *vec, const float *src);
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// Returns the Dot Product of 2 3D vectors
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float vec3DotProduct(const float *lhs, const float *rhs);
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// Returns the Dot Product of 2 4D vectors
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float vec4DotProduct(const float *lhs, const float *rhs);
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// Returns the length of a 3D vector
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// (i.e the distance of a point from the origin)
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float vec3Length(const float *vec);
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// Returns the distance between two 3D points
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float vec3Distance(const float *pointA, const float *pointB);
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#endif //__VECTOR_UTIL_H__
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