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DrawTriangle update

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This commit is contained in:
Miloslav Číž 2019-06-29 18:15:14 +02:00
parent 526dc5f60d
commit cca1c2fcd4
1 changed files with 11 additions and 9 deletions
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small3dlib.h
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@ -1928,13 +1928,13 @@ void S3L_drawTriangle(
velues can be computed. See velues can be computed. See
http://www.lysator.liu.se/~mikaelk/doc/perspectivetexture/ */ http://www.lysator.liu.se/~mikaelk/doc/perspectivetexture/ */
#if S3L_PERSPECTIVE_CORRECTION == 1 #if S3L_PERSPECTIVE_CORRECTION == 1
#define Z_RECIP_NUMERATOR\ #define Z_RECIP_NUMERATOR\
(S3L_FRACTIONS_PER_UNIT * S3L_FRACTIONS_PER_UNIT * S3L_FRACTIONS_PER_UNIT) (S3L_FRACTIONS_PER_UNIT * S3L_FRACTIONS_PER_UNIT * S3L_FRACTIONS_PER_UNIT)
#elif S3L_PERSPECTIVE_CORRECTION == 2 #elif S3L_PERSPECTIVE_CORRECTION == 2
#define Z_RECIP_NUMERATOR\ #define Z_RECIP_NUMERATOR\
(S3L_FRACTIONS_PER_UNIT * S3L_FRACTIONS_PER_UNIT) (S3L_FRACTIONS_PER_UNIT * S3L_FRACTIONS_PER_UNIT)
#endif #endif
/* ^ This numerator is a number by which we divide values for the /* ^ This numerator is a number by which we divide values for the
reciprocals. For PC == 2 it has to be lower because linear interpolation reciprocals. For PC == 2 it has to be lower because linear interpolation
scaling would make it overflow -- this results in lower depth precision scaling would make it overflow -- this results in lower depth precision
@ -2251,16 +2251,18 @@ void S3L_drawTriangle(
} // inner loop } // inner loop
} // y clipping } // y clipping
#if !S3L_FLAT
S3L_stepFastLerp(lSideFLS); S3L_stepFastLerp(lSideFLS);
S3L_stepFastLerp(rSideFLS); S3L_stepFastLerp(rSideFLS);
#if S3L_COMPUTE_LERP_DEPTH #if S3L_COMPUTE_LERP_DEPTH
S3L_stepFastLerp(lDepthFLS); S3L_stepFastLerp(lDepthFLS);
S3L_stepFastLerp(rDepthFLS); S3L_stepFastLerp(rDepthFLS);
#endif
#endif #endif
++currentY; ++currentY;
} } // row drawing
#undef manageSplit #undef manageSplit
#undef initPC #undef initPC