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Add depth to pixelinfo

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This commit is contained in:
Miloslav Číž 2019-05-21 14:13:07 +02:00
parent bf9223c4c4
commit 6ff62a8995
2 changed files with 31 additions and 24 deletions
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53
s3l.h
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@ -112,26 +112,32 @@
#include <stdint.h>
#ifndef S3L_RESOLUTION_X
#define S3L_RESOLUTION_X 640 //< Redefine to your screen x resolution.
#define S3L_RESOLUTION_X 640 ///< Redefine to your screen x resolution.
#endif
#ifndef S3L_RESOLUTION_Y
#define S3L_RESOLUTION_Y 480 //< Redefine to your screen y resolution.
#define S3L_RESOLUTION_Y 480 ///< Redefine to your screen y resolution.
#endif
#ifndef S3L_COMPUTE_DEPTH
#define S3L_COMPUTE_DEPTH 0 /**< Whether to compute depth for each pixel
(fragment). Some other options may turn this
on. */
#endif
#ifndef S3L_PERSPECTIVE_CORRECTION
#define S3L_PERSPECTIVE_CORRECTION 0 /**< Specifies what type of perspective
correction (PC) to use. Remember
this is an expensive operation!
Possible values:
#define S3L_PERSPECTIVE_CORRECTION 0 /**< Specifies what type of perspective
correction (PC) to use. Remember
this is an expensive operation!
Possible values:
0: no PC, fastest but ugliest
1: full (per-pixel) PC, nicest but
extremely expensive!
2: triangle subdivided PC, a
compromise between quality and
speed (TODO, not implemented)
*/
0: no PC, fastest but ugliest
1: full (per-pixel) PC, nicest but
extremely expensive!
2: triangle subdivided PC, a
compromise between quality and
speed (TODO, not implemented)
*/
#endif
typedef int32_t S3L_Unit; /**< Units of measurement in 3D space. There is
@ -151,19 +157,19 @@ typedef int16_t S3L_ScreenCoord;
typedef uint16_t S3L_Index;
#ifndef S3L_NEAR
#define S3L_NEAR (S3L_FRACTIONS_PER_UNIT) /**< Distance of the near clipping
plane. */
#define S3L_NEAR (S3L_FRACTIONS_PER_UNIT / 4) /**< Distance of the near
clipping plane. */
#endif
#ifndef S3L_FAST_LERP_QUALITY
#define S3L_FAST_LERP_QUALITY 8 /**< Quality (scaling) of SOME linear
interpolations. 0 will most likely be
faster, but artifacts can occur for
bigger tris, while higher values can fix
this -- in theory all higher values will
have the same speed (it is a shift
value), but it mustn't be too high to
prevent overflow. */
#define S3L_FAST_LERP_QUALITY 8 /**< Quality (scaling) of SOME linear
interpolations. 0 will most likely be
faster, but artifacts can occur for
bigger tris, while higher values can fix
this -- in theory all higher values will
have the same speed (it is a shift
value), but it mustn't be too high to
prevent overflow. */
#endif
#define S3L_HALF_RESOLUTION_X (S3L_RESOLUTION_X >> 1)
@ -346,6 +352,7 @@ typedef struct
S3L_Unit barycentric1; ///< Baryc. coord 1 (corresponds to 2nd vertex).
S3L_Unit barycentric2; ///< Baryc. coord 2 (corresponds to 3rd vertex).
S3L_Index triangleID;
S3L_Unit depth; ///< Depth (only if depth is turned on).
} S3L_PixelInfo; /**< Used to pass the info about a rasterized pixel
(fragment) to the user-defined drawing func. */

2
testSDL.c
View file

@ -12,7 +12,7 @@
#define S3L_RESOLUTION_X 640
#define S3L_RESOLUTION_Y 480
#define S3L_PERSPECTIVE_CORRECTION 1
#define S3L_PERSPECTIVE_CORRECTION 0
#include "s3l.h"