williamjcm/small3dlib
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Remove unusable constants

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This commit is contained in:
Miloslav Číž 2019-06-02 12:56:58 +02:00
parent ec3bd55895
commit 8c00c5d7fd
2 changed files with 50 additions and 8 deletions
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53
small3dlib.h
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@ -371,6 +371,18 @@ typedef struct
static inline void S3L_initTransoform3D(S3L_Transform3D *t);
void S3L_setTransform3D(
S3L_Unit tx,
S3L_Unit ty,
S3L_Unit tz,
S3L_Unit rx,
S3L_Unit ry,
S3L_Unit rz,
S3L_Unit sx,
S3L_Unit sy,
S3L_Unit sz,
S3L_Transform3D *t);
/** Converts rotation transformation to three direction vectors of given length
(any one can be NULL, in which case it won't be computed). */
void S3L_rotationToDirections(
@ -447,7 +459,11 @@ static inline void S3L_initCamera(S3L_Camera *c);
typedef struct
{
uint8_t backfaceCulling;
uint8_t backfaceCulling; /**< What backface culling to use. Possible
values:
- 0 none
- 1 clock-wise
- 2 counter clock-wise */
} S3L_DrawConfig;
void S3L_initDrawConfig(S3L_DrawConfig *config);
@ -489,10 +505,6 @@ typedef struct
static inline void S3L_initPixelInfo(S3L_PixelInfo *p);
#define S3L_BACKFACE_CULLING_NONE 0
#define S3L_BACKFACE_CULLING_CW 1
#define S3L_BACKFACE_CULLING_CCW 2
// general helper functions
static inline S3L_Unit S3L_abs(S3L_Unit value);
static inline S3L_Unit S3L_min(S3L_Unit v1, S3L_Unit v2);
@ -1001,6 +1013,31 @@ void S3L_initTransoform3D(S3L_Transform3D *t)
t->scale.z = S3L_FRACTIONS_PER_UNIT;
}
void S3L_setTransform3D(
S3L_Unit tx,
S3L_Unit ty,
S3L_Unit tz,
S3L_Unit rx,
S3L_Unit ry,
S3L_Unit rz,
S3L_Unit sx,
S3L_Unit sy,
S3L_Unit sz,
S3L_Transform3D *t)
{
t->translation.x = tx;
t->translation.y = ty;
t->translation.z = tz;
t->rotation.x = rx;
t->rotation.y = ry;
t->rotation.z = rz;
t->scale.x = sx;
t->scale.y = sy;
t->scale.z = sz;
}
void S3L_initCamera(S3L_Camera *c)
{
c->focalLength = S3L_FRACTIONS_PER_UNIT;
@ -1733,13 +1770,13 @@ static inline int8_t S3L_triangleIsVisible(
#undef clipTest
if (backfaceCulling != S3L_BACKFACE_CULLING_NONE)
if (backfaceCulling != 0)
{
int32_t winding = // determines CW or CCW
(p1.y - p0.y) * (p2.x - p1.x) - (p1.x - p0.x) * (p2.y - p1.y);
if ((backfaceCulling == S3L_BACKFACE_CULLING_CW && winding < 0) ||
(backfaceCulling == S3L_BACKFACE_CULLING_CCW && winding >= 0))
if ((backfaceCulling == 1 && winding < 0) ||
(backfaceCulling == 2 && winding >= 0))
return 0;
}

5
testSDL.c
View file

@ -251,6 +251,9 @@ void draw()
{
nextT = nowT;
printf("FPS: %d\n",fps);
printf("camera: ");
S3L_writeTransform3D(scene.camera.transform);
fps = 0;
}
}
@ -277,6 +280,8 @@ scene.camera.transform.rotation.x = -35;
scene.camera.transform.rotation.y = 128;
scene.camera.transform.rotation.z = 0;
S3L_setTransform3D(-542,-449,3259,39,216,0,512,512,512,&(scene.camera.transform));
scene.modelCount = 2;
scene.models = models;