# source:project/wiki/eggref/4/gl-math@31363

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1== gl-math
2[[toc:]]
3A small math library aimed at gamedev that provides 4x4 float matrix, vector, and quaternion operations. Uses the [[https://github.com/AlexCharlton/hypermath|hypermath]] library.
4
5
6=== Requirements
7* matchable
8
9
10=== Documentation
11gl-math provides a number of functions for working with 4x4 matrices (plus a handful of others). The functionality is similar to what can be found in the [[http://wiki.call-cc.org/eggref/4/glm|glm egg]], but with some notable differences:
12
13* Matrix functions only operate on 4x4 matrices
14* Matrix functions can accept either f32vectors or pointers
15* No container is used to represent matrices
16
17Additionally, gl-math is one fifth the compiled size of glm, has a more straight-forward code-base, and complete documentation.
18
19gl-math expects matrices, vectors, and quaternions to be f32vectors or pointers. f32vectors must be 16 elements long, 3 elements long, or 4 elements long for matrices, vectors, or quaternions, respectively. The memory pointed to should likewise be an array of 16, 3, or 4 floats . If a function accepts more than one matrix, vector, or quaternion, all must be of the same type.
20
21gl-math operates on matrices in a column-major fashion in correspondence with OpenGL (e.g. translation components are at indices 12, 13, and 14). Vectors are arranged as ({{(x y z)}}), and quaternions as ({{(x y z w)}}).
22
23
24==== Matrix operations
25<procedure> (print-mat4 MATRIX)</procedure>
26
27Prints the given {{MATRIX}} to {{(current-output-port)}}.
28
29<procedure> (copy-mat4 MATRIX [RESULT])</procedure>
30
31Make a copy of {{MATRIX}}. If the matrix {{RESULT}} is given, it will be modified to contain the contents of {{MATRIX}}. If {{RESULT}} is {{#t}}, {{MATRIX}} must be an f32vector and the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, {{MATRIX}} must be an f32vector and the returned value will be an f32vector located in normal garbage collected memory.
32
33<procedure> (m* A B [RESULT])</procedure>
34
35Multiply matrix {{A}} by matrix {{B}}. If the matrix {{RESULT}} is given, it will be modified to contain the results of the multiplication. If {{RESULT}} is {{#t}}, {{A}} and {{B}} must be f32vectors and the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, {{A}} and {{B}} must be f32vectors and the returned value will be an f32vector located in normal garbage collected memory.
36
37<procedure> (mat4-identity [RESULT])</procedure>
38
39Return an identity matrix. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
40
41<procedure> (translation VECTOR [RESULT])</procedure>
42
43Return the translation matrix given by {{VECTOR}}. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
44
45<procedure> (translate VECTOR MATRIX)</procedure>
46
47Translate {{MATRIX}} by {{VECTOR}}.
48
49<procedure> (x-rotation ANGLE [RESULT])</procedure>
50
51Return the rotation matrix given by a rotation of {{ANGLE}} radians around the x-axis. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
52
53<procedure> (rotate-x ANGLE MATRIX)</procedure>
54
55Rotate {{MATRIX}} around the x-axis by {{ANGLE}} radians.
56
57<procedure> (y-rotation ANGLE [RESULT])</procedure>
58
59Return the rotation matrix given by a rotation of {{ANGLE}} radians around the y-axis. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
60
61<procedure> (rotate-y ANGLE MATRIX)</procedure>
62
63Rotate {{MATRIX}} around the y-axis by {{ANGLE}} radians.
64
65<procedure> (z-rotation ANGLE [RESULT])</procedure>
66
67Return the rotation matrix given by a rotation of {{ANGLE}} radians around the z-axis. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
68
69<procedure> (rotate-z ANGLE MATRIX)</procedure>
70
71Rotate {{MATRIX}} around the z-axis by {{ANGLE}} radians.
72
73<procedure> (axis-angle-rotation AXIS ANGLE [RESULT])</procedure>
74
75Return the rotation matrix given by a rotation of {{ANGLE}} radians around the vector {{AXIS}}. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
76
77<procedure> (rotate-axis-angle AXIS ANGLE MATRIX)</procedure>
78
79Rotate {{MATRIX}} around the vector {{AXIS}} by {{ANGLE}} radians.
80
81<procedure> (quaternion-rotation Q [RESULT])</procedure>
82
83Return the rotation matrix given by the quaternion {{Q}}. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
84
85<procedure> (rotate-quaternion Q MATRIX)</procedure>
86
87Rotate {{MATRIX}} by the quaternion {{Q}}.
88
89<procedure> (ypr-rotation YAW PITCH ROLL [RESULT])</procedure>
90
91Return the rotation matrix given by rotating by {{ROLL}} radians around the z-axis followed by {{PITCH}} radians around the x-axis followed by {{YAW}} radians around the y-axis. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
92
93<procedure> (rotate-ypr YAW PITCH ROLL MATRIX)</procedure>
94
95Rotate {{MATRIX}} by {{ROLL}} radians around the z-axis followed by {{PITCH}} radians around the x-axis followed by {{YAW}} radians around the y-axis.
96
97<procedure> (2d-scaling SCALE-X SCALE-Y [RESULT])</procedure>
98
99Return the matrix created by scaling the x and y axes by {{SCALE-X}} and {{SCALE-Y}}. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
100
101<procedure> (scale-2d SCALE-X SCALE-Y MATRIX)</procedure>
102
103Scale the x and y axis of {{MATRIX}} by {{SCALE-X}} and {{SCALE-Y}}.
104
105<procedure> (3d-scaling SCALE-X SCALE-Y SCALE-Z [RESULT])</procedure>
106
107Return the matrix created by scaling the x, y and z axes by {{SCALE-X}}, {{SCALE-Y}}, and {{SCALE-Z}}. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
108
109<procedure> (scale-3d SCALE-X SCALE-Y SCALE-Z MATRIX)</procedure>
110
111Scale the x, y, and z axis of {{MATRIX}} by {{SCALE-X}}, {{SCALE-Y}}, and {{SCALE-Z}}.
112
113<procedure> (scaling SCALE [RESULT])</procedure>
114
115Return the matrix created by scaling the x, y and z axes by {{SCALE}}. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
116
117<procedure> (scale SCALE MATRIX)</procedure>
118
119Scale the x, y, and z axis of {{MATRIX}} by {{SCALE}}.
120
121<procedure> (flip-x MATRIX)</procedure>
122
123Flip (mirror) {{MATRIX}} along the x-axis.
124
125<procedure> (flip-y MATRIX)</procedure>
126
127Flip (mirror) {{MATRIX}} along the y-axis.
128
129<procedure> (flip-z MATRIX)</procedure>
130
131Flip (mirror) {{MATRIX}} along the z-axis.
132
133<procedure> (translate-rotate-scale-2d VECTOR ANGLE SCALE [RESULT])</procedure>
134
135Efficiently create a matrix translated by {{VECTOR}}, rotated around the z-axis by {{ANGLE}} radians, then scaled by {{SCALE}}. If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
136
137<procedure> (transpose MATRIX [RESULT])</procedure>
138
139Transpose {{MATRIX}}. If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, {{MATRIX}} must be an f32vector and the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, {{MATRIX}} must be an f32vector and the returned value will be an f32vector located in normal garbage collected memory.
140
141<procedure> (inverse MATRIX [RESULT])</procedure>
142
143Invert {{MATRIX}}. If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, {{MATRIX}} must be an f32vector and the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, {{MATRIX}} must be an f32vector and the returned value will be an f32vector located in normal garbage collected memory.
144
145
146==== Perspective matrices
147<procedure> (ortho WIDTH HEIGHT NEAR FAR [RESULT])</procedure>
148
149Create an orthographic projection matrix. If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
150
151<procedure> (perspective WIDTH HEIGHT NEAR FAR ANGLE [RESULT])</procedure>
152
153Create an perspective projection matrix. If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
154
155<procedure> (frustum LEFT RIGHT BOTTOM TOP NEAR FAR [RESULT])</procedure>
156
157Create a view-frustum matrix. If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
158
159
160==== Camera functions
161<procedure> (look-at EYE OBJ UP [RESULT])</procedure>
162
163Create a âlook-atâ style camera matrix. The camera is positioned at point {{EYE}}, pointing towards the point {{OBJ}}. {{UP}} defines the cameraâs up vector. If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
164
165<procedure> (camera-inverse CAMERA [RESULT])</procedure>
166
167Invert {{CAMERA}} in an efficient fashion. This allows the camera to be constructed in an intuitive fashion by translating and rotating before inverting in order to position the scene properly. This function is far faster than the general {{inverse}} function, but the matrix {{CAMERA}} must only be a matrix representing a translation and a rotation (no scaling). If the matrix {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}}, {{CAMERA}} must be an f32vector and the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, {{CAMERA}} must be an f32vector and the returned value will be an f32vector located in normal garbage collected memory.
168
169
170==== Vector operations
171<procedure> (make-point X Y Z [NON-GC?])</procedure>
172<procedure> (point-x POINT)</procedure>
173<procedure> (point-y POINT)</procedure>
174<procedure> (point-z POINT)</procedure>
175<procedure> (point-x-set! POINT)</procedure>
176<procedure> (point-y-set! POINT)</procedure>
177<procedure> (point-z-set! POINT)</procedure>
178
179Vector constructor, getters, and setters. If {{NON-GC}} is {{#t}}, the point is created in a non-garbage-collected area (the memory will still be freed when there are no more references to the vector).
180
181<procedure> (v+ A B [RESULT])</procedure>
182
183Return the result of the addition of vectors {{A}} and {{B}}. If the vector {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
184
185<procedure> (v- A B [RESULT])</procedure>
186
187Return the result of the subtraction of vector {{B}} from {{A}}. If the vector {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
188
189<procedure> (v* V S [RESULT])</procedure>
190
191Return the result of the multiplication of vector {{A}} with scalar {{S}}. If the vector {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
192
193<procedure> (cross-product A B [RESULT])</procedure>
194
195Return the result of the cross product between the vectors {{A}} and {{B}}. If the vector {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
196
197<procedure> (dot-product A B)</procedure>
198
199Return the result of the dot product between the vectors {{A}} and {{B}}.
200
201<procedure> (vector-magnitude V)</procedure>
202
203Return the magnitude of vector {{V}}.
204
205<procedure> (normalize! V)</procedure>
206
207Destructively normalize the vector {{V}}.
208
209<procedure> (m*vector! MATRIX VECTOR)</procedure>
210
211Destructively multiply {{VECTOR}} by {{MATRIX}}.
212
213<procedure> (m*vector-array! MATRIX VECTORS stride: [STRIDE] length: [LENGTH])</procedure>
214
215Destructively multiply the array of 3 element floats {{VECTORS}} by {{MATRIX}}. {{VECTORS}} may be given as an f32vector or a pointer. The keyword {{STRIDE}} specifies the number of elements between consecutive vectors, given in number of floats (which must be at least 3) when {{VECTORS}} is an f32vector and in bytes when {{VECTORS}} is a pointer. When {{VECTORS}} is given as a pointer, the keyword {{LENGTH}} must be provided, specifying the number of vectors in {{VECTORS}}.
216
217<procedure> (lerp A B T [RESULT])</procedure>
218
219Linear interpolation between the points {{A}} and {{B}} with the interpolation parameter {{T}} which must be between 0 and 1. If the vector {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
220
221
222==== Quaternion operations
223Quaternions are expected to be normalized before they are used in certain functions ({{quaternion-normalize}} may be used to do so). All the provided functions that create quaternions, create unit quaternions.
224
225The order of quaternion cross-multiplication is the inverse of the âstandardâ order, so a quaternion that has undergone a series or rotations will represent the same rotation as a marix that has gone through the same series, in the same order.
226
227<procedure> (make-quaternion X Y Z W [NON-GC?])</procedure>
228<procedure> (quaternion-x POINT)</procedure>
229<procedure> (quaternion-y POINT)</procedure>
230<procedure> (quaternion-z POINT)</procedure>
231<procedure> (quaternion-w POINT)</procedure>
232<procedure> (quaternion-x-set! POINT)</procedure>
233<procedure> (quaternion-y-set! POINT)</procedure>
234<procedure> (quaternion-z-set! POINT)</procedure>
235<procedure> (quaternion-w-set! POINT)</procedure>
236
237Quaternion constructor, getters, and setters. If {{NON-GC}} is {{#t}}, the quaternion is created in a non-garbage-collected area (the memory will still be freed when there are no more references to the quaternion).
238
239<procedure> (quaternion-normalize! Q)</procedure>
240
241Destructively normalize the quaternion {{Q}}.
242
243<procedure> (quaternion-inverse Q [RESULT])</procedure>
244
245Return the inverse of the unit quaternion {{Q}}. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
246
247<procedure> (quaternion-cross-product A B [RESULT])</procedure>
248
249Return the cross-product of the quaternions {{A}} and {{B}}. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
250
251<procedure> (quaternion-axis-angle-rotation AXIS ANGLE [RESULT])</procedure>
252
253Return the quaternion corresponding to a rotation of {{ANGLE}} radians around the vector {{AXIS}}. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
254
255<procedure> (quaternion-rotate-axis-angle AXIS ANGLE Q)</procedure>
256
257Rotate the quaternion {{Q}} by a rotation of {{ANGLE}} radians around the vector {{AXIS}}.
258
259<procedure> (quaternion-x-rotation ANGLE [RESULT])</procedure>
260
261Return the quaternion corresponding to a rotation of {{ANGLE}} radians around the x-axis. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
262
263<procedure> (quaternion-rotate-x ANGLE Q)</procedure>
264
265Rotate the quaternion {{Q}} by a rotation of {{ANGLE}} radians around the x-axis.
266
267<procedure> (quaternion-y-rotation ANGLE [RESULT])</procedure>
268
269Return the quaternion corresponding to a rotation of {{ANGLE}} radians around the y-axis. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
270
271<procedure> (quaternion-rotate-y ANGLE Q)</procedure>
272
273Rotate the quaternion {{Q}} by a rotation of {{ANGLE}} radians around the y-axis.
274
275<procedure> (quaternion-z-rotation ANGLE [RESULT])</procedure>
276
277Return the quaternion corresponding to a rotation of {{ANGLE}} radians around the z-axis. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
278
279<procedure> (quaternion-rotate-z ANGLE Q)</procedure>
280
281Rotate the quaternion {{Q}} by a rotation of {{ANGLE}} radians around the z-axis.
282
283<procedure> (quaternion-ypr-rotation YAW PITCH ROLL [RESULT])</procedure>
284
285Return the quaternion corresponding to a rotation of {{ROLL}} radians around the z-axis followed by {{PITCH}} radians around the x-axis followed by {{YAW}} radians around the y-axis. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
286
287<procedure> (quaternion-rotate-ypr YAW PITCH ROLL Q)</procedure>
288
289Rotate the quaternion {{Q}} by {{ROLL}} radians around the z-axis followed by {{PITCH}} radians around the x-axis followed by {{YAW}} radians around the y-axis.
290
291<procedure> (quaternion-rotate-point! Q P)</procedure>
292
293Destructively rotate the point {{P}} by the unit quaternion {{Q}}.
294
295<procedure> (slerp A B T [RESULT])</procedure>
296
297Spherical linear interpolation between the quaternions {{A}} and {{B}} with the interpolation parameter {{T}} which must be between 0 and 1. If the quaternion {{RESULT}} is given, it will be modified to contain the result. If {{RESULT}} is {{#t}} the returned value will be an f32vector located in non-garbage-collected memory (the memory will still be freed when there are no more references to the matrix). If {{RESULT}} is not provided, the returned value will be an f32vector located in normal garbage collected memory.
298
299
300==== Angle operations
302
303Converts {{ANGLE}} from degrees to radians.
304
306
307Converts {{ANGLE}} from radians to degrees.
308
309<constant> pi</constant>
310<constant> pi/2</constant>
311
312
313=== Example
314<enscript highlight="scheme">
315(import chicken scheme)
316(use gl-math)
317
318(define projection-matrix
319  (perspective 640 480 0.1 100 70))
320
321(define view-matrix
322  (look-at (make-point 1 0 3)
323           (make-point 0 0 0)
324           (make-point 0 1 0)))
325
326(define model-matrix (mat4-identity))
327
328(print-mat4 (m* projection-matrix
329                (m* view-matrix model-matrix)))
330</enscript>
331
332
333=== Version history
334
335==== Version 0.5.2
33610 September 2014
337
338* {{m*vector-array!}}: Stride is given in bytes when vector is a pointer
339
340'''Version 0.5.0'''
341
3422 September 2014
343
344* Many new vector and quaternion functions
345* Functions that previously accepted vectors as individual floats, now accept them as f32vectors
346
347
348==== Version 0.4.1
34930 August 2014
350
351* Fix {{m*vector-array!}}
352
353'''Version 0.4.0'''
354
35527 July 2014
356
358
359
360==== Version 0.3.2
36121 July 2014
362
363* Allow pointer to array of vectors to be passed to {{m*vector-array!}}
364* Fix error forms
365
366'''Version 0.3.1'''
367
36823 June 2014
369
370* Matrix vector multiplication
371
372
373==== Version 0.2.0
37421 June 2014
375
376* Each transformation function now has two variants: one that initializes a matrix, and one that operates on a matrix
377* Provide {{pi/2}}
378* Provide quaternion and YPR rotation
380* Fix optional arguments for matrix operations
381* Fix a bug in {{look-at}}
382
383
384==== Version 0.1.0
38517 June 2014
386
387* Initial release
388
389
390=== Source repository
391Source available on [[https://github.com/AlexCharlton/gl-math|GitHub]].
392
393Bug reports and patches welcome! Bugs can be reported via GitHub or to alex.n.charlton at gmail.
394
395
396=== Author
397Alex Charlton
398
399
400=== Licence
401BSD
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