peter
/
gb
1
0
Fork 0
Code Projects Releases Wiki Activity

Remove memzero

This commit is contained in:
gingerBill 2016-05-25 20:24:25 +01:00
parent ba14473a03
commit ced2879528
2 changed files with 7 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
View File

@ -5,7 +5,7 @@ gb single-file public domain libraries for C & C++
library | latest version | category | description
----------------|----------------|----------|-------------
**gb.h** | 0.20 | misc | Helper library (Standard library _improvement_)
**gb_math.h** | 0.06f | math | Vector math library geared towards game development
**gb_math.h** | 0.06g | math | Vector math library geared towards game development
**gb_gl.h** | 0.05 | graphics | OpenGL Helper Library
**gb_string.h** | 0.95a | strings | A better string library (this is built into gb.h too with custom allocator support!)
**gb_ini.h** | 0.93 | misc | Simple ini file loader library

20
gb_math.h
View File

@ -1,8 +1,9 @@
/* gb_math.h - v0.06f - public domain C math library - no warranty implied; use at your own risk
/* gb_math.h - v0.06g - public domain C math library - no warranty implied; use at your own risk
A C math library geared towards game development
use '#define GB_MATH_IMPLEMENTATION' before including to create the implementation in _ONE_ file
Version History:
0.06g - Remove memzero
0.06f - Remove warning on MSVC
0.06e - Change brace style and fix some warnings
0.06d - Bug fix
@ -755,15 +756,6 @@ static void gb__memcpy_4byte(void *dest, void const *src, size_t size) {
}
}
/* NOTE(bill): To remove the need for memset */
static void gb__memzero_byte4(void *dest, size_t size) {
unsigned *d = (unsigned *)dest;
unsigned i;
for (i = 0; i < size/4; i++)
*d++ = 0;
}
float gb_to_radians(float degrees) { return degrees * GB_MATH_TAU / 360.0f; }
float gb_to_degrees(float radians) { return radians * 360.0f / GB_MATH_TAU; }
@ -1529,9 +1521,9 @@ void gb_mat4_ortho3d(gbMat4 *out, float left, float right, float bottom, float t
void gb_mat4_perspective(gbMat4 *out, float fovy, float aspect, float z_near, float z_far) {
float tan_half_fovy = gb_tan(0.5f * fovy);
gbMat4 zero_mat = {0};
gbFloat4 *m = gb_float44_m(out);
gb__memzero_byte4(m, sizeof(gbMat4));
*out = zero_mat;
m[0][0] = 1.0f / (aspect*tan_half_fovy);
m[1][1] = 1.0f / (tan_half_fovy);
@ -1546,9 +1538,9 @@ void gb_mat4_infinite_perspective(gbMat4 *out, float fovy, float aspect, float z
float right = range * aspect;
float bottom = -range;
float top = range;
gbMat4 zero_mat = {0};
gbFloat4 *m = gb_float44_m(out);
gb__memzero_byte4(m, sizeof(gbMat4));
*out = zero_mat;
m[0][0] = (2.0f*z_near) / (right - left);
m[1][1] = (2.0f*z_near) / (top - bottom);