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Optimize helper functions

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This commit is contained in:
Miloslav Číž 2019-10-12 02:02:32 +02:00
parent 2483fb05d4
commit 7c5f93fac1
3 changed files with 15 additions and 5 deletions
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2
programs/modelViewer.c
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@ -346,7 +346,7 @@ void setModel(uint8_t index)
#undef modelCase
S3L_initTransoform3D(&(scene.models[0].transform));
S3L_initTransform3D(&(scene.models[0].transform));
S3L_initDrawConfig(&(scene.models[0].config));
if (index == 3)

4
programs/test.c
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@ -6,7 +6,11 @@
*/
#include <stdio.h>
#define S3L_PIXEL_FUNCTION pixelFunc
#define S3L_RESOLUTION_X 100
#define S3L_RESOLUTION_Y 100
#include "../small3dlib.h"
#define TEST_BUFFER_W 16

14
small3dlib.h
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@ -10,7 +10,7 @@
license: CC0 1.0 (public domain)
found at https://creativecommons.org/publicdomain/zero/1.0/
+ additional waiver of all IP
version: 0.851
version: 0.852
Before including the library, define S3L_PIXEL_FUNCTION to the name of the
function you'll be using to draw single pixels (this function will be called
@ -568,6 +568,7 @@ static inline S3L_Unit S3L_max(S3L_Unit v1, S3L_Unit v2);
static inline S3L_Unit S3L_clamp(S3L_Unit v, S3L_Unit v1, S3L_Unit v2);
static inline S3L_Unit S3L_wrap(S3L_Unit value, S3L_Unit mod);
static inline S3L_Unit S3L_nonZero(S3L_Unit value);
static inline S3L_Unit S3L_zeroClamp(S3L_Unit value);
S3L_Unit S3L_sin(S3L_Unit x);
S3L_Unit S3L_asin(S3L_Unit x);
@ -1205,7 +1206,7 @@ void S3L_vec3Xmat4(S3L_Vec4 *v, S3L_Mat4 *m)
S3L_Unit S3L_abs(S3L_Unit value)
{
return value >= 0 ? value : -1 * value;
return value * (((value >= 0) << 1) - 1);
}
S3L_Unit S3L_min(S3L_Unit v1, S3L_Unit v2)
@ -1223,6 +1224,11 @@ S3L_Unit S3L_clamp(S3L_Unit v, S3L_Unit v1, S3L_Unit v2)
return v >= v1 ? (v <= v2 ? v : v2) : v1;
}
S3L_Unit S3L_zeroClamp(S3L_Unit value)
{
return (value * (value >= 0));
}
S3L_Unit S3L_wrap(S3L_Unit value, S3L_Unit mod)
{
return value >= 0 ? (value % mod) : (mod + (value % mod) - 1);
@ -1230,7 +1236,7 @@ S3L_Unit S3L_wrap(S3L_Unit value, S3L_Unit mod)
S3L_Unit S3L_nonZero(S3L_Unit value)
{
return value != 0 ? value : 1;
return (value + (value == 0));
}
S3L_Unit S3L_interpolate(S3L_Unit v1, S3L_Unit v2, S3L_Unit t, S3L_Unit tMax)
@ -2600,7 +2606,7 @@ void S3L_drawScene(S3L_Scene scene)
S3L_sortArray[S3L_sortArrayLength].modelIndex = modelIndex;
S3L_sortArray[S3L_sortArrayLength].triangleIndex = triangleIndex;
S3L_sortArray[S3L_sortArrayLength].sortValue =
S3L_max(0,(transformed0.w + transformed1.w + transformed2.w)) >> 2;
S3L_zeroClamp(transformed0.w + transformed1.w + transformed2.w) >> 2;
/* ^
The w component here stores non-clamped z.