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More lighting improvements

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This commit is contained in:
Luke Benstead 2020-02-19 09:30:26 +00:00
parent 24fe33358c
commit a502f92ded
1 changed files with 11 additions and 12 deletions
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23
GL/lighting.c
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@ -5,11 +5,13 @@
#include <dc/vec3f.h>
#include "private.h"
#define _MIN(x, y) (x < y) ? x : y
/* Lighting will not be calculated if the attenuation
* multiplier ends up less than this value */
#define ATTENUATION_THRESHOLD 0.01f
static GLfloat SCENE_AMBIENT [] = {0.2, 0.2, 0.2, 1.0};
static GLfloat SCENE_AMBIENT [] = {0.2f, 0.2f, 0.2f, 1.0f};
static GLboolean VIEWER_IN_EYE_COORDINATES = GL_TRUE;
static GLenum COLOR_CONTROL = GL_SINGLE_COLOR;
static GLboolean TWO_SIDED_LIGHTING = GL_FALSE;
@ -181,7 +183,7 @@ void APIENTRY glMaterialf(GLenum face, GLenum pname, const GLfloat param) {
return;
}
MATERIAL.exponent = param;
MATERIAL.exponent = _MIN(param, 128); /* 128 is the max according to the GL spec */
}
void APIENTRY glMateriali(GLenum face, GLenum pname, const GLint param) {
@ -279,10 +281,10 @@ GL_FORCE_INLINE float FEXP(float y) {
#define LOGBODGE 0.346607f
#define POWBODGE 0.33971f
const static float FINT_MAX = (float) INT_MAX;
const static float FINT_MAX = ((float) INT_MAX) + 1.0f;
GL_FORCE_INLINE float FFLOOR(float x) {
return (int)(x + FINT_MAX) - INT_MAX;
return ((int)(x + FINT_MAX) + INT_MIN);
}
GL_FORCE_INLINE float FLOG2(float i) {
@ -331,21 +333,18 @@ GL_FORCE_INLINE float vec3_dot_limited(
return (ret < 0) ? 0 : ret;
}
#define _MIN(x, y) (x < y) ? x : y
GL_FORCE_INLINE void _glLightVertexDirectional(uint8_t* final, int8_t lid, float LdotN, float NdotH) {
float F;
float FI = (LdotN != 0.0f);
uint8_t FO;
float FI = (LdotN != 0.0f);
FI = (MATERIAL.exponent) ? FPOW(FI * NdotH, MATERIAL.exponent) : 1.0f;
#define _PROCESS_COMPONENT(T, X) \
F = (MATERIAL.ambient[X] * LIGHTS[lid].ambient[X]); \
F += (LdotN * MATERIAL.diffuse[X] * LIGHTS[lid].diffuse[X]); \
FI = (MATERIAL.exponent) ? FPOW(FI * NdotH, MATERIAL.exponent) : 1.0f; \
F += FI * MATERIAL.specular[X] * LIGHTS[lid].specular[X]; \
FO = (uint8_t) (_MIN(F * 255.0f, 255.0f)); \
\
final[T] += _MIN(FO, 255 - final[T]); \
final[T] += _MIN(FO, 255 - final[T]);
_PROCESS_COMPONENT(R8IDX, 0);
_PROCESS_COMPONENT(G8IDX, 1);
@ -356,13 +355,13 @@ GL_FORCE_INLINE void _glLightVertexDirectional(uint8_t* final, int8_t lid, float
GL_FORCE_INLINE void _glLightVertexPoint(uint8_t* final, int8_t lid, float LdotN, float NdotH, float att) {
float F;
float FI = (LdotN != 0.0f);
uint8_t FO;
float FI = (LdotN != 0.0f);
FI = (MATERIAL.exponent) ? FPOW(FI * NdotH, MATERIAL.exponent) : 1.0f;
#define _PROCESS_COMPONENT(T, X) \
F = (MATERIAL.ambient[X] * LIGHTS[lid].ambient[X]); \
F += (LdotN * MATERIAL.diffuse[X] * LIGHTS[lid].diffuse[X]); \
FI = (MATERIAL.exponent) ? FPOW(FI * NdotH, MATERIAL.exponent) : 1.0f; \
F += FI * MATERIAL.specular[X] * LIGHTS[lid].specular[X]; \
FO = (uint8_t) (_MIN(F * att * 255.0f, 255.0f)); \
\