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Add wider types

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This commit is contained in:
Miloslav Ciz 2022-04-17 14:07:21 +02:00
parent c1225cfbbc
commit d29d9a51d1
2 changed files with 34 additions and 5 deletions
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1
programs/level.c
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@ -22,6 +22,7 @@
#define S3L_NEAR (S3L_FRACTIONS_PER_UNIT / 5) #define S3L_NEAR (S3L_FRACTIONS_PER_UNIT / 5)
#define S3L_USE_WIDER_TYPES 0
#define S3L_FLAT 0 #define S3L_FLAT 0
#define S3L_SORT 0 #define S3L_SORT 0
#define S3L_Z_BUFFER 1 #define S3L_Z_BUFFER 1

38
small3dlib.h
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@ -10,7 +10,7 @@
license: CC0 1.0 (public domain) license: CC0 1.0 (public domain)
found at https://creativecommons.org/publicdomain/zero/1.0/ found at https://creativecommons.org/publicdomain/zero/1.0/
+ additional waiver of all IP + additional waiver of all IP
version: 0.900d version: 0.901d
Before including the library, define S3L_PIXEL_FUNCTION to the name of the 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 function you'll be using to draw single pixels (this function will be called
@ -171,20 +171,48 @@
#define S3L_RESOLUTION_Y S3L_resolutionY #define S3L_RESOLUTION_Y S3L_resolutionY
#endif #endif
#ifndef S3L_USE_WIDER_TYPES
/** If true, the library will use wider data types which will largely supress
many rendering bugs and imprecisions happening due to overflows, but this will
also consumer more RAM and may potentially be slower on computers with smaller
native integer. */
#define S3L_USE_WIDER_TYPES 0
#endif
/** Units of measurement in 3D space. There is S3L_FRACTIONS_PER_UNIT in one /** Units of measurement in 3D space. There is S3L_FRACTIONS_PER_UNIT in one
spatial unit. By dividing the unit into fractions we effectively achieve a spatial unit. By dividing the unit into fractions we effectively achieve a
fixed point arithmetic. The number of fractions is a constant that serves as fixed point arithmetic. The number of fractions is a constant that serves as
1.0 in floating point arithmetic (normalization etc.). */ 1.0 in floating point arithmetic (normalization etc.). */
typedef int32_t S3L_Unit; typedef
#if S3L_USE_WIDER_TYPES
int64_t
#else
int32_t
#endif
S3L_Unit;
/** How many fractions a spatial unit is split into. This is NOT SUPPOSED TO /** How many fractions a spatial unit is split into. This is NOT SUPPOSED TO
BE REDEFINED, so rather don't do it (otherwise things may overflow etc.). */ BE REDEFINED, so rather don't do it (otherwise things may overflow etc.). */
#define S3L_FRACTIONS_PER_UNIT 512 #define S3L_FRACTIONS_PER_UNIT 512
typedef int16_t S3L_ScreenCoord; typedef
typedef uint16_t S3L_Index; #if S3L_USE_WIDER_TYPES
int32_t
#else
int16_t
#endif
S3L_ScreenCoord;
typedef
#if S3L_USE_WIDER_TYPES
uint32_t
#else
uint16_t
#endif
S3L_Index;
#ifndef S3L_NEAR_CROSS_STRATEGY #ifndef S3L_NEAR_CROSS_STRATEGY
/** Specifies how the library will handle triangles that partially cross the /** Specifies how the library will handle triangles that partially cross the