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Add depth to pixelinfo

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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> #include <stdint.h>
#ifndef S3L_RESOLUTION_X #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 #endif
#ifndef S3L_RESOLUTION_Y #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 #endif
#ifndef S3L_PERSPECTIVE_CORRECTION #ifndef S3L_PERSPECTIVE_CORRECTION
#define S3L_PERSPECTIVE_CORRECTION 0 /**< Specifies what type of perspective #define S3L_PERSPECTIVE_CORRECTION 0 /**< Specifies what type of perspective
correction (PC) to use. Remember correction (PC) to use. Remember
this is an expensive operation! this is an expensive operation!
Possible values: Possible values:
0: no PC, fastest but ugliest 0: no PC, fastest but ugliest
1: full (per-pixel) PC, nicest but 1: full (per-pixel) PC, nicest but
extremely expensive! extremely expensive!
2: triangle subdivided PC, a 2: triangle subdivided PC, a
compromise between quality and compromise between quality and
speed (TODO, not implemented) speed (TODO, not implemented)
*/ */
#endif #endif
typedef int32_t S3L_Unit; /**< Units of measurement in 3D space. There is 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; typedef uint16_t S3L_Index;
#ifndef S3L_NEAR #ifndef S3L_NEAR
#define S3L_NEAR (S3L_FRACTIONS_PER_UNIT) /**< Distance of the near clipping #define S3L_NEAR (S3L_FRACTIONS_PER_UNIT / 4) /**< Distance of the near
plane. */ clipping plane. */
#endif #endif
#ifndef S3L_FAST_LERP_QUALITY #ifndef S3L_FAST_LERP_QUALITY
#define S3L_FAST_LERP_QUALITY 8 /**< Quality (scaling) of SOME linear #define S3L_FAST_LERP_QUALITY 8 /**< Quality (scaling) of SOME linear
interpolations. 0 will most likely be interpolations. 0 will most likely be
faster, but artifacts can occur for faster, but artifacts can occur for
bigger tris, while higher values can fix bigger tris, while higher values can fix
this -- in theory all higher values will this -- in theory all higher values will
have the same speed (it is a shift have the same speed (it is a shift
value), but it mustn't be too high to value), but it mustn't be too high to
prevent overflow. */ prevent overflow. */
#endif #endif
#define S3L_HALF_RESOLUTION_X (S3L_RESOLUTION_X >> 1) #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 barycentric1; ///< Baryc. coord 1 (corresponds to 2nd vertex).
S3L_Unit barycentric2; ///< Baryc. coord 2 (corresponds to 3rd vertex). S3L_Unit barycentric2; ///< Baryc. coord 2 (corresponds to 3rd vertex).
S3L_Index triangleID; S3L_Index triangleID;
S3L_Unit depth; ///< Depth (only if depth is turned on).
} S3L_PixelInfo; /**< Used to pass the info about a rasterized pixel } S3L_PixelInfo; /**< Used to pass the info about a rasterized pixel
(fragment) to the user-defined drawing func. */ (fragment) to the user-defined drawing func. */

2
testSDL.c
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@ -12,7 +12,7 @@
#define S3L_RESOLUTION_X 640 #define S3L_RESOLUTION_X 640
#define S3L_RESOLUTION_Y 480 #define S3L_RESOLUTION_Y 480
#define S3L_PERSPECTIVE_CORRECTION 1 #define S3L_PERSPECTIVE_CORRECTION 0
#include "s3l.h" #include "s3l.h"