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[sw] Make alight_t lightvec an actual vector 

The change to using separate per-model-type entity queues resulted in
the lighting vector used for alias and iqm models being in an ephemeral
location (in the shared setup_lighting function's stack frame). This
resulted in the model rendering code getting a garbage vector due to it
being overwritten by another stack frame. What I don't get is why the
garbage varied from run to run for the same demo (demo2, the first scrag
behind the start door showed the bad lighting nicely), which made
tracking down the offending commit (and thus the code) rather
troublesome, though once I found it, it was a bit of a face-palm moment.
This commit is contained in:
Bill Currie 2022-03-17 15:04:30 +09:00
parent 6c29904b1d
commit 833fb2f4f8
4 changed files with 30 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/r_local.h
View File

@ -47,9 +47,9 @@
// viewmodel lighting =======================================================
typedef struct {
int ambientlight;
int shadelight;
float *plightvec;
int ambientlight;
int shadelight;
vec3_t lightvec;
} alight_t;
// clipped bmodel edges =====================================================

22
libs/video/renderer/sw/sw_ralias.c
View File

@ -52,7 +52,7 @@ trivertx_t *r_apverts;
// TODO: these probably will go away with optimized rasterization
static mdl_t *pmdl;
vec3_t r_plightvec;
vec3_t r_lightvec;
int r_ambientlight;
float r_shadelight;
static aliashdr_t *paliashdr;
@ -413,7 +413,7 @@ R_AliasTransformFinalVert (finalvert_t *fv, trivertx_t *pverts,
// lighting
plightnormal = r_avertexnormals[pverts->lightnormalindex];
lightcos = DotProduct (plightnormal, r_plightvec);
lightcos = DotProduct (plightnormal, r_lightvec);
temp = r_ambientlight;
if (lightcos < 0) {
@ -463,7 +463,7 @@ R_AliasTransformAndProjectFinalVerts (finalvert_t *fv, stvert_t *pstverts)
// lighting
plightnormal = r_avertexnormals[pverts->lightnormalindex];
lightcos = DotProduct (plightnormal, r_plightvec);
lightcos = DotProduct (plightnormal, r_lightvec);
temp = r_ambientlight;
if (lightcos < 0) {
@ -555,11 +555,11 @@ R_AliasSetupSkin (entity_t *ent)
static void
R_AliasSetupLighting (alight_t *plighting)
R_AliasSetupLighting (alight_t *lighting)
{
// guarantee that no vertex will ever be lit below LIGHT_MIN, so we don't
// have to clamp off the bottom
r_ambientlight = plighting->ambientlight;
r_ambientlight = lighting->ambientlight;
if (r_ambientlight < LIGHT_MIN)
r_ambientlight = LIGHT_MIN;
@ -569,7 +569,7 @@ R_AliasSetupLighting (alight_t *plighting)
if (r_ambientlight < LIGHT_MIN)
r_ambientlight = LIGHT_MIN;
r_shadelight = plighting->shadelight;
r_shadelight = lighting->shadelight;
if (r_shadelight < 0)
r_shadelight = 0;
@ -577,9 +577,9 @@ R_AliasSetupLighting (alight_t *plighting)
r_shadelight *= VID_GRADES;
// rotate the lighting vector into the model's frame of reference
r_plightvec[0] = DotProduct (plighting->plightvec, alias_forward);
r_plightvec[1] = DotProduct (plighting->plightvec, alias_left);
r_plightvec[2] = DotProduct (plighting->plightvec, alias_up);
r_lightvec[0] = DotProduct (lighting->lightvec, alias_forward);
r_lightvec[1] = DotProduct (lighting->lightvec, alias_left);
r_lightvec[2] = DotProduct (lighting->lightvec, alias_up);
}
/*
@ -598,7 +598,7 @@ R_AliasSetupFrame (entity_t *ent)
void
R_AliasDrawModel (entity_t *ent, alight_t *plighting)
R_AliasDrawModel (entity_t *ent, alight_t *lighting)
{
int size;
finalvert_t *finalverts;
@ -623,7 +623,7 @@ R_AliasDrawModel (entity_t *ent, alight_t *plighting)
R_AliasSetupSkin (ent);
R_AliasSetUpTransform (ent, ent->visibility.trivial_accept);
R_AliasSetupLighting (plighting);
R_AliasSetupLighting (lighting);
R_AliasSetupFrame (ent);
r_affinetridesc.drawtype = ((ent->visibility.trivial_accept == 3)

10
libs/video/renderer/sw/sw_riqm.c
View File

@ -58,14 +58,14 @@
// avoid the need for inner-loop light
// clamping
static vec3_t r_plightvec;
static vec3_t r_lightvec;
static int r_ambientlight;
static float r_shadelight;
static inline int
calc_light (float *normal)
{
float lightcos = DotProduct (normal, r_plightvec);
float lightcos = DotProduct (normal, r_lightvec);
int temp = r_ambientlight;
if (lightcos < 0) {
@ -236,9 +236,9 @@ R_IQMSetupLighting (entity_t *ent, alight_t *plighting)
mat4f_t mat;
Transform_GetWorldMatrix (ent->transform, mat);
//FIXME vectorize
r_plightvec[0] = DotProduct (plighting->plightvec, mat[0]);
r_plightvec[1] = DotProduct (plighting->plightvec, mat[1]);
r_plightvec[2] = DotProduct (plighting->plightvec, mat[2]);
r_lightvec[0] = DotProduct (plighting->lightvec, mat[0]);
r_lightvec[1] = DotProduct (plighting->lightvec, mat[1]);
r_lightvec[2] = DotProduct (plighting->lightvec, mat[2]);
}
static void

27
libs/video/renderer/sw/sw_rmain.c
View File

@ -60,8 +60,6 @@
#endif
void *colormap;
static vec3_t viewlightvec;
static alight_t r_viewlighting = { 128, 192, viewlightvec };
int r_numallocatededges;
qboolean r_drawpolys;
qboolean r_drawculledpolys;
@ -369,7 +367,7 @@ setup_lighting (entity_t *ent, alight_t *lighting)
lighting->ambientlight = j;
lighting->shadelight = j;
lighting->plightvec = lightvec;
VectorCopy (lightvec, lighting->lightvec);
for (unsigned lnum = 0; lnum < r_maxdlights; lnum++) {
if (r_dlights[lnum].die >= vr_data.realtime) {
@ -439,7 +437,6 @@ static void
R_DrawViewModel (void)
{
// FIXME: remove and do real lighting
float lightvec[3] = { -1, 0, 0 };
int j;
unsigned int lnum;
vec3_t dist;
@ -447,6 +444,7 @@ R_DrawViewModel (void)
float minlight;
dlight_t *dl;
entity_t *viewent;
alight_t lighting;
if (vr_data.inhibit_viewmodel
|| !r_drawviewmodel->int_val
@ -459,8 +457,7 @@ R_DrawViewModel (void)
VectorCopy (Transform_GetWorldPosition (viewent->transform), r_entorigin);
VectorCopy (vup, viewlightvec);
VectorNegate (viewlightvec, viewlightvec);
VectorNegate (vup, lighting.lightvec);
minlight = max (viewent->renderer.min_light,
viewent->renderer.model->min_light);
@ -468,8 +465,8 @@ R_DrawViewModel (void)
j = max (R_LightPoint (&r_refdef.worldmodel->brush,
r_entorigin), minlight * 128);
r_viewlighting.ambientlight = j;
r_viewlighting.shadelight = j;
lighting.ambientlight = j;
lighting.shadelight = j;
// add dynamic lights
for (lnum = 0; lnum < r_maxdlights; lnum++) {
@ -484,18 +481,16 @@ R_DrawViewModel (void)
VectorSubtract (r_entorigin, dl->origin, dist);
add = dl->radius - VectorLength (dist);
if (add > 0)
r_viewlighting.ambientlight += add;
lighting.ambientlight += add;
}
// clamp lighting so it doesn't overbright as much
if (r_viewlighting.ambientlight > 128)
r_viewlighting.ambientlight = 128;
if (r_viewlighting.ambientlight + r_viewlighting.shadelight > 192)
r_viewlighting.shadelight = 192 - r_viewlighting.ambientlight;
if (lighting.ambientlight > 128)
lighting.ambientlight = 128;
if (lighting.ambientlight + lighting.shadelight > 192)
lighting.shadelight = 192 - lighting.ambientlight;
r_viewlighting.plightvec = lightvec;
R_AliasDrawModel (viewent, &r_viewlighting);
R_AliasDrawModel (viewent, &lighting);
}
static int