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81 commits

Author SHA1 Message Date
Bill Currie
f0dc995c67 Handle c99 inline vs gnu89 inline. 
The meaning of "extern inline" and "inline" swaps between the two, and
gcc-5 uses c99 inline.
 2015-08-18 00:11:03 +09:00
Bill Currie
6eec76dd49 Implement Fischer's SEB algorithm (for 3d). 
Now we can get tight (<1e-6 * radius_squared error) bounding spheres. More
importantly (for qfvis, anyway) very quickly: 1.7Mspheres/second for a 5
point cloud on my 2.33GHz Core 2 :)
 2013-03-13 17:10:55 +09:00
Bill Currie
b6d4766201 Add a function to find the circumsphere of up to 4 points. 
It seems to be a little sloppy (an error of a bit less than 1e-4). This
might be why I'm having trouble with my SEB code.
 2013-03-13 14:35:30 +09:00
Bill Currie
0cd6d93030 Add a function to get the barycentric coords of a point. 
It "works" for lines, triangles and tetrahedrons. For lines and triangles,
it gives the barycentric coordinates of the perpendicular projection of the
point onto to features. Only tetrahedrons are guaranteed to reproduce the
original point.
 2013-03-12 14:16:42 +09:00
Bill Currie
54b4d589aa Split up mathlib.h into several smaller headers. 
This should make maintaining them a little easier.

The copyright block in most of the new headers (execpt vector.h) reflect
when the functions in the relevant header were first created.
 2012-08-19 17:39:09 +09:00
Bill Currie
6f484ee757 Add support and tests for 3x3 matrices. 2012-08-18 16:29:57 +09:00
Bill Currie
848db2e306 Correct a comment. 
The shear factors were listed next to scale... a tad confusing.
 2012-08-04 10:47:46 +09:00
Bill Currie
b5add680f7 Add Mat4as3MultVec. 
to transform a vertex without the translation (eg, for normals) without
having to have separate matrices.
 2012-05-20 15:20:18 +09:00
Bill Currie
6ace105e31 Fix some macro parenthesis issues. 2012-05-19 21:25:58 +09:00
Bill Currie
02f8aa6b75 Add Mat4MultAdd macro. 2012-05-17 15:56:01 +09:00
Bill Currie
c694b9f77e Add Mat4Blend macro. 2012-05-15 21:08:46 +09:00
Bill Currie
9a3206795e Add VectorUnshear(). 
VectorUnshear uses the exact same shear vector to remove shear from a
sheared vector. ie with:
  VectorShear (shear, v, w);
  VectorUnshear (shear, w, x);
x == v within fp math limits.
 2012-05-15 21:08:44 +09:00
Bill Currie
9f253454e4 Implement and test Mat4Inverse(). 2012-05-15 21:08:44 +09:00
Bill Currie
fa6270322f Make Mat4Decompose a little more intuitive. 
Params are now in application order (good thing not much code uses it yet).
 2012-05-15 21:08:44 +09:00
Bill Currie
1473dbd526 Add a comment about the evaluation order in VectorShear. 2012-05-15 21:08:44 +09:00
Bill Currie
de131c18ad Add VectorShear and really test Mat4Decompose. 
And the tests really exercised VectorShear (first attempt had things
messed up when more than one shear value was non-zero). Also,
Mat4Decompose wasn't orthogonalizing the z axis row. Oops. Anyway,
Mat4Decompose is now known to work well, and the usage of its output is
understood :)
 2012-05-15 21:08:44 +09:00
Bill Currie
82abd5e426 More matrix tests. 2012-05-15 21:08:44 +09:00
Bill Currie
730f9668bd Add support for mat4 * vec3 2012-05-15 21:08:44 +09:00
Bill Currie
50af8a562e Add tests for matrix decomposition and fix the bugs. 2012-05-15 21:08:44 +09:00
Bill Currie
724427a976 Add component-wise vector and quaternion division. 
Mostly for non-uniform scaling.
 2012-05-15 21:08:44 +09:00
Bill Currie
215d2e9747 Add a function to decompose a matrix. 
The function gives rotation(quaternion), scale, shear, and translation (all
three as vectors), shear is (XY, XZ, YZ).
 2012-05-15 21:08:44 +09:00
Bill Currie
890223ef8e Correct the definition of DualQuatNorm. 
I'd gotten the norm and magnitude mixed up (partly because the document I
was following got the names mixed up), and then munged the formulas
together.
 2012-05-15 21:08:43 +09:00
Bill Currie
f874aeb941 Add support for duals and dual quaternions. 
Not everything is unit-tested, but the currently important stuff is.
 2012-05-15 21:08:43 +09:00
Bill Currie
8791b35e55 Add support for half floats. 
iqm and OpenGL use them, so they might come in handy. The tests use values
from wikipedia and a couple extra.
 2012-04-26 20:55:11 +09:00
Bill Currie
efaef89c5f Add a shortcut function for quaterion/vector multiplication. 
I got the idea from blender when I discovered by accident that quat * vect
produces the same result as quat * qvect * quat* and looked up the code to
check what was going on. While matrix/vector multiplication still beats the
pants off quaternion/vector multiplication, QuatMultVec is a slight
optimization over quat * qvect * quat* (17+,24* vs 24+,32*, plus no need to
to generate quat*).
 2012-04-26 09:48:08 +09:00
Bill Currie
bc1b483525 Nuke the rcsid stuff. 
It's pretty useless in git.
 2012-04-22 10:56:32 +09:00
Bill Currie
cbd13ac54e Implement QuatExp and fix up QuatBlend's param names. 2012-01-12 21:22:06 +09:00
Bill Currie
ea2ae1436c Fix some bugs in the new matrix functions/macros. 2011-12-31 13:20:31 +09:00
Bill Currie
35bf957d08 Add a 4x4 matrix type and some functions for it. 2011-12-30 20:11:53 +09:00
Bill Currie
edb05fdfce Rename Vector3Scale and QuatCompScale. 
They are now VectorCompMult and QuatCompMult.
 2011-12-30 20:04:55 +09:00
Bill Currie
b96ca6f0e0 Add QuatCompScale and fix a bug in QuatScale. 2011-12-28 08:59:52 +09:00
Bill Currie
ce8c2e717a Add some more vector/quat component macros. 2011-12-24 20:10:37 +09:00
Bill Currie
cc5140e3a1 Move min/max/bound and field_offset into better locations. 
min/max bound into mathlib.h (they /are/ math functions, after all) and
field_offset into qtypes.h.
 2011-12-24 10:04:33 +09:00
Bill Currie
8b78aeb666 Add component-wise vector and quaternion comparison macros. 
Also, re-implement VectorCompare and QuatCompare using the new macros.

VectorCompCompare and QuatCompCompare take a parameter specifying the
comparison operator to use. All component-wise comparisons must be true
for the whole comparison to be true.
 2011-12-22 16:54:21 +09:00
Bill Currie
b38cb1e221 Create some nicer docs for AngleVectors. 2011-12-13 14:15:03 +09:00
Bill Currie
3a386293fc Add Vector3Scale macro. 
Vector3Scale individually scales the components of one vector by the
components of another vector.
 2011-11-28 20:56:19 +09:00
Bill Currie
91e65b6c80 Rename mplane_t to plane_t and clean up the mess. 
I got rather tired of there being multiple definitions of mostly compatible
plane types (and I need a common type anyway). dplane_t still exists for
now because I want to be careful when messing with the actual bsp format.
 2011-11-28 20:54:34 +09:00
Bill Currie
94362cc010 Add macros to ease printing of vectors and quaternions. 
I got sick of having to pass all those parameters to printf. Let the
compiler do it for me.
 2011-09-07 09:41:06 +09:00
Bill Currie
12e238f806 Add a function to convert quake angles to a quaternion. 
The test works by comparing the result of AngleVectors with forward,
right, and up vectors rotated by the quaternion resulting from AngleQuat.
 2011-09-04 09:58:12 +09:00
Bill Currie
eb205d73fd Add a function to convert a quaternion to a rotation matrix. 2011-09-04 09:58:12 +09:00
Bill Currie
a59fee5346 Add the QuatSet macro. 
Same as the VectorSet macro.
 2011-09-04 09:58:11 +09:00
Bill Currie
d638fdce83 Add a PlaneFlip macro. 2011-05-07 19:29:03 +09:00
Bill Currie
33db650161 Add QuatInverse to calculate 1/q. 
There's still no direct quaternion division because I don't know if the
definition of q1/q2 is (1/q2)*q1 or q1*(1/q2) (it does make a difference).
 2011-01-18 22:22:18 +09:00
Bill Currie
13503198e5 Add quat_origin convenience constant. 
Same as vec3_origin in that all elements are zero.
 2011-01-11 08:41:40 +09:00
Bill Currie
8808eba3ff add VectorSet macro 
VectorSet(a,b,c,d) -> vec3_t d = (a, b, c)

This should be useful.
 2010-10-13 20:52:05 +09:00
Brian Koropoff
fc293864dc Fix visibility of VectorNormalize and other math functions 2007-03-17 21:06:00 +00:00
Bill Currie
99c0954b47 the big dso visibility patch :). Sure, we have to have unique names for static builds, but with controlled visibitly we should get faster program loads (although this isn't C++, so it's not as bad) and complex plugins are cleaner. 2007-03-10 12:00:59 +00:00
Bill Currie
6fbddc3d43 so that's the right way to do groups and subgroups... 2006-12-05 11:40:00 +00:00
Bill Currie
8770df39e5 start documenting things (progs building still borked) 
This is an imperfect revision of history.
 2004-11-08 23:27:00 +00:00
Bill Currie
39685d0c63 more readability and add the quaternion functions 2004-04-07 18:01:45 +00:00