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Merge branch 'gl-dropshadows' into 'next' 

OpenGL drop shadows

See merge request STJr/SRB2!703
This commit is contained in:
James R 2020-01-20 16:52:40 -05:00
parent a7770c3e97 43828f265c
commit 0d460aed1d
3 changed files with 83 additions and 208 deletions
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280
src/hardware/hw_main.c
View File

@ -41,6 +41,7 @@
#include "../i_system.h"
#include "../m_cheat.h"
#include "../f_finale.h"
#include "../r_things.h" // R_GetShadowZ
#ifdef ESLOPE
#include "../p_slopes.h"
#endif
@ -4050,39 +4051,6 @@ static gr_vissprite_t *HWR_NewVisSprite(void)
return HWR_GetVisSprite(gr_visspritecount++);
}
#ifdef GLBADSHADOWS
// Finds a floor through which light does not pass.
static fixed_t HWR_OpaqueFloorAtPos(fixed_t x, fixed_t y, fixed_t z, fixed_t height)
{
const sector_t *sec = R_PointInSubsector(x, y)->sector;
fixed_t floorz = sec->floorheight;
if (sec->ffloors)
{
ffloor_t *rover;
fixed_t delta1, delta2;
const fixed_t thingtop = z + height;
for (rover = sec->ffloors; rover; rover = rover->next)
{
if (!(rover->flags & FF_EXISTS)
|| !(rover->flags & FF_RENDERPLANES)
|| rover->flags & FF_TRANSLUCENT
|| rover->flags & FF_FOG
|| rover->flags & FF_INVERTPLANES)
continue;
delta1 = z - (*rover->bottomheight + ((*rover->topheight - *rover->bottomheight)/2));
delta2 = thingtop - (*rover->bottomheight + ((*rover->topheight - *rover->bottomheight)/2));
if (*rover->topheight > floorz && abs(delta1) < abs(delta2))
floorz = *rover->topheight;
}
}
return floorz;
}
#endif //#ifdef GLBADSHADOWS
//
// HWR_DoCulling
// Hardware version of R_DoCulling
@ -4123,180 +4091,123 @@ static boolean HWR_DoCulling(line_t *cullheight, line_t *viewcullheight, float v
return false;
}
#ifdef GLBADSHADOWS
static void HWR_DrawSpriteShadow(gr_vissprite_t *spr, GLPatch_t *gpatch, float this_scale)
static void HWR_DrawDropShadow(mobj_t *thing, gr_vissprite_t *spr, fixed_t scale)
{
FOutVector swallVerts[4];
GLPatch_t *gpatch;
FOutVector shadowVerts[4];
FSurfaceInfo sSurf;
fixed_t floorheight, mobjfloor;
float offset = 0;
float fscale; float fx; float fy; float offset;
UINT8 lightlevel = 255;
extracolormap_t *colormap = NULL;
UINT8 i;
mobjfloor = HWR_OpaqueFloorAtPos(
spr->mobj->x, spr->mobj->y,
spr->mobj->z, spr->mobj->height);
if (cv_shadowoffs.value)
{
angle_t shadowdir;
INT32 light;
fixed_t scalemul;
UINT16 alpha;
fixed_t floordiff;
fixed_t floorz;
fixed_t slopez;
pslope_t *floorslope;
// Set direction
if (splitscreen && stplyr == &players[secondarydisplayplayer])
shadowdir = localangle2 + FixedAngle(cv_cam2_rotate.value);
else
shadowdir = localangle + FixedAngle(cv_cam_rotate.value);
floorz = R_GetShadowZ(thing, &floorslope);
// Find floorheight
floorheight = HWR_OpaqueFloorAtPos(
spr->mobj->x + P_ReturnThrustX(spr->mobj, shadowdir, spr->mobj->z - mobjfloor),
spr->mobj->y + P_ReturnThrustY(spr->mobj, shadowdir, spr->mobj->z - mobjfloor),
spr->mobj->z, spr->mobj->height);
//if (abs(floorz - gr_viewz) / tz > 4) return; // Prevent stretchy shadows and possible crashes
// The shadow is falling ABOVE it's mobj?
// Don't draw it, then!
if (spr->mobj->z < floorheight)
return;
else
{
fixed_t floorz;
floorz = HWR_OpaqueFloorAtPos(
spr->mobj->x + P_ReturnThrustX(spr->mobj, shadowdir, spr->mobj->z - floorheight),
spr->mobj->y + P_ReturnThrustY(spr->mobj, shadowdir, spr->mobj->z - floorheight),
spr->mobj->z, spr->mobj->height);
// The shadow would be falling on a wall? Don't draw it, then.
// Would draw midair otherwise.
if (floorz < floorheight)
return;
}
floordiff = abs(thing->z - floorz);
floorheight = FixedInt(spr->mobj->z - floorheight);
alpha = floordiff / (4*FRACUNIT) + 75;
if (alpha >= 255) return;
alpha = 255 - alpha;
offset = floorheight;
}
else
floorheight = FixedInt(spr->mobj->z - mobjfloor);
gpatch = (GLPatch_t *)W_CachePatchName("DSHADOW", PU_CACHE);
if (!(gpatch && gpatch->mipmap->grInfo.format)) return;
HWR_GetPatch(gpatch);
scalemul = FixedMul(FRACUNIT - floordiff/640, scale);
scalemul = FixedMul(scalemul, (thing->radius*2) / gpatch->height);
fscale = FIXED_TO_FLOAT(scalemul);
fx = FIXED_TO_FLOAT(thing->x);
fy = FIXED_TO_FLOAT(thing->y);
// create the sprite billboard
//
// 3--2
// | /|
// |/ |
// 0--1
// x1/x2 were already scaled in HWR_ProjectSprite
// First match the normal sprite
swallVerts[0].x = swallVerts[3].x = spr->x1;
swallVerts[2].x = swallVerts[1].x = spr->x2;
swallVerts[0].z = swallVerts[3].z = spr->z1;
swallVerts[2].z = swallVerts[1].z = spr->z2;
if (thing && fabsf(fscale - 1.0f) > 1.0E-36f)
offset = (gpatch->height/2) * fscale;
else
offset = (float)(gpatch->height/2);
if (spr->mobj && fabsf(this_scale - 1.0f) > 1.0E-36f)
shadowVerts[0].x = shadowVerts[3].x = fx - offset;
shadowVerts[2].x = shadowVerts[1].x = fx + offset;
shadowVerts[0].z = shadowVerts[1].z = fy - offset;
shadowVerts[3].z = shadowVerts[2].z = fy + offset;
if (floorslope)
{
// Always a pixel above the floor, perfectly flat.
swallVerts[0].y = swallVerts[1].y = swallVerts[2].y = swallVerts[3].y = spr->ty - gpatch->topoffset * this_scale - (floorheight+3);
// Now transform the TOP vertices along the floor in the direction of the camera
swallVerts[3].x = spr->x1 + ((gpatch->height * this_scale) + offset) * gr_viewcos;
swallVerts[2].x = spr->x2 + ((gpatch->height * this_scale) + offset) * gr_viewcos;
swallVerts[3].z = spr->z1 + ((gpatch->height * this_scale) + offset) * gr_viewsin;
swallVerts[2].z = spr->z2 + ((gpatch->height * this_scale) + offset) * gr_viewsin;
for (i = 0; i < 4; i++)
{
slopez = P_GetZAt(floorslope, FLOAT_TO_FIXED(shadowVerts[i].x), FLOAT_TO_FIXED(shadowVerts[i].z));
shadowVerts[i].y = FIXED_TO_FLOAT(slopez) + 0.05f;
}
}
else
{
// Always a pixel above the floor, perfectly flat.
swallVerts[0].y = swallVerts[1].y = swallVerts[2].y = swallVerts[3].y = spr->ty - gpatch->topoffset - (floorheight+3);
// Now transform the TOP vertices along the floor in the direction of the camera
swallVerts[3].x = spr->x1 + (gpatch->height + offset) * gr_viewcos;
swallVerts[2].x = spr->x2 + (gpatch->height + offset) * gr_viewcos;
swallVerts[3].z = spr->z1 + (gpatch->height + offset) * gr_viewsin;
swallVerts[2].z = spr->z2 + (gpatch->height + offset) * gr_viewsin;
}
// We also need to move the bottom ones away when shadowoffs is on
if (cv_shadowoffs.value)
{
swallVerts[0].x = spr->x1 + offset * gr_viewcos;
swallVerts[1].x = spr->x2 + offset * gr_viewcos;
swallVerts[0].z = spr->z1 + offset * gr_viewsin;
swallVerts[1].z = spr->z2 + offset * gr_viewsin;
for (i = 0; i < 4; i++)
shadowVerts[i].y = FIXED_TO_FLOAT(floorz) + 0.05f;
}
if (spr->flip)
{
swallVerts[0].sow = swallVerts[3].sow = gpatch->max_s;
swallVerts[2].sow = swallVerts[1].sow = 0;
shadowVerts[0].sow = shadowVerts[3].sow = gpatch->max_s;
shadowVerts[2].sow = shadowVerts[1].sow = 0;
}
else
{
swallVerts[0].sow = swallVerts[3].sow = 0;
swallVerts[2].sow = swallVerts[1].sow = gpatch->max_s;
shadowVerts[0].sow = shadowVerts[3].sow = 0;
shadowVerts[2].sow = shadowVerts[1].sow = gpatch->max_s;
}
// flip the texture coords (look familiar?)
if (spr->vflip)
{
swallVerts[3].tow = swallVerts[2].tow = gpatch->max_t;
swallVerts[0].tow = swallVerts[1].tow = 0;
shadowVerts[3].tow = shadowVerts[2].tow = gpatch->max_t;
shadowVerts[0].tow = shadowVerts[1].tow = 0;
}
else
{
swallVerts[3].tow = swallVerts[2].tow = 0;
swallVerts[0].tow = swallVerts[1].tow = gpatch->max_t;
shadowVerts[3].tow = shadowVerts[2].tow = 0;
shadowVerts[0].tow = shadowVerts[1].tow = gpatch->max_t;
}
sSurf.FlatColor.s.red = 0x00;
sSurf.FlatColor.s.blue = 0x00;
sSurf.FlatColor.s.green = 0x00;
/*if (spr->mobj->frame & FF_TRANSMASK || spr->mobj->flags2 & MF2_SHADOW)
if (thing->subsector->sector->numlights)
{
sector_t *sector = spr->mobj->subsector->sector;
UINT8 lightlevel = 255;
extracolormap_t *colormap = sector->extra_colormap;
light = R_GetPlaneLight(thing->subsector->sector, floorz, false); // Always use the light at the top instead of whatever I was doing before
if (sector->numlights)
{
INT32 light = R_GetPlaneLight(sector, spr->mobj->floorz, false);
lightlevel = *thing->subsector->sector->lightlist[light].lightlevel;
if (!(spr->mobj->frame & FF_FULLBRIGHT))
lightlevel = *sector->lightlist[light].lightlevel;
if (*sector->lightlist[light].extra_colormap)
colormap = *sector->lightlist[light].extra_colormap;
}
else
{
lightlevel = sector->lightlevel;
if (sector->extra_colormap)
colormap = sector->extra_colormap;
}
if (colormap)
sSurf.FlatColor.rgba = HWR_Lighting(lightlevel/2, colormap->rgba, colormap->fadergba, false, true);
else
sSurf.FlatColor.rgba = HWR_Lighting(lightlevel/2, NORMALFOG, FADEFOG, false, true);
}*/
// shadow is always half as translucent as the sprite itself
if (!cv_translucency.value) // use default translucency (main sprite won't have any translucency)
sSurf.FlatColor.s.alpha = 0x80; // default
else if (spr->mobj->flags2 & MF2_SHADOW)
sSurf.FlatColor.s.alpha = 0x20;
else if (spr->mobj->frame & FF_TRANSMASK)
{
HWR_TranstableToAlpha((spr->mobj->frame & FF_TRANSMASK)>>FF_TRANSSHIFT, &sSurf);
sSurf.FlatColor.s.alpha /= 2; //cut alpha in half!
if (*thing->subsector->sector->lightlist[light].extra_colormap)
colormap = *thing->subsector->sector->lightlist[light].extra_colormap;
}
else
sSurf.FlatColor.s.alpha = 0x80; // default
if (sSurf.FlatColor.s.alpha > floorheight/4)
{
sSurf.FlatColor.s.alpha = (UINT8)(sSurf.FlatColor.s.alpha - floorheight/4);
HWD.pfnDrawPolygon(&sSurf, swallVerts, 4, PF_Translucent|PF_Modulated|PF_Clip);
lightlevel = thing->subsector->sector->lightlevel;
if (thing->subsector->sector->extra_colormap)
colormap = thing->subsector->sector->extra_colormap;
}
if (colormap)
sSurf.FlatColor.rgba = HWR_Lighting(lightlevel, colormap->rgba, colormap->fadergba, false, false);
else
sSurf.FlatColor.rgba = HWR_Lighting(lightlevel, NORMALFOG, FADEFOG, false, false);
sSurf.FlatColor.s.alpha = alpha;
HWD.pfnDrawPolygon(&sSurf, shadowVerts, 4, PF_Translucent|PF_Modulated|PF_Clip);
}
#endif //#ifdef GLBADSHADOWS
// This is expecting a pointer to an array containing 4 wallVerts for a sprite
static void HWR_RotateSpritePolyToAim(gr_vissprite_t *spr, FOutVector *wallVerts)
@ -4372,24 +4283,6 @@ static void HWR_SplitSprite(gr_vissprite_t *spr)
//Hurdler: 25/04/2000: now support colormap in hardware mode
HWR_GetMappedPatch(gpatch, spr->colormap);
#ifdef GLBADSHADOWS
// Draw shadow BEFORE sprite
if (cv_shadow.value // Shadows enabled
&& (spr->mobj->flags & (MF_SCENERY|MF_SPAWNCEILING|MF_NOGRAVITY)) != (MF_SCENERY|MF_SPAWNCEILING|MF_NOGRAVITY) // Ceiling scenery have no shadow.
&& !(spr->mobj->flags2 & MF2_DEBRIS) // Debris have no corona or shadow.
#ifdef ALAM_LIGHTING
&& !(t_lspr[spr->mobj->sprite]->type // Things with dynamic lights have no shadow.
&& (!spr->mobj->player || spr->mobj->player->powers[pw_super])) // Except for non-super players.
#endif
&& (spr->mobj->z >= spr->mobj->floorz)) // Without this, your shadow shows on the floor, even after you die and fall through the ground.
{
////////////////////
// SHADOW SPRITE! //
////////////////////
HWR_DrawSpriteShadow(spr, gpatch, this_scale);
}
#endif //#ifdef GLBADSHADOWS
baseWallVerts[0].x = baseWallVerts[3].x = spr->x1;
baseWallVerts[2].x = baseWallVerts[1].x = spr->x2;
baseWallVerts[0].z = baseWallVerts[3].z = spr->z1;
@ -4776,24 +4669,6 @@ static void HWR_DrawSprite(gr_vissprite_t *spr)
//Hurdler: 25/04/2000: now support colormap in hardware mode
HWR_GetMappedPatch(gpatch, spr->colormap);
#ifdef GLBADSHADOWS
// Draw shadow BEFORE sprite
if (cv_shadow.value // Shadows enabled
&& (spr->mobj->flags & (MF_SCENERY|MF_SPAWNCEILING|MF_NOGRAVITY)) != (MF_SCENERY|MF_SPAWNCEILING|MF_NOGRAVITY) // Ceiling scenery have no shadow.
&& !(spr->mobj->flags2 & MF2_DEBRIS) // Debris have no corona or shadow.
#ifdef ALAM_LIGHTING
&& !(t_lspr[spr->mobj->sprite]->type // Things with dynamic lights have no shadow.
&& (!spr->mobj->player || spr->mobj->player->powers[pw_super])) // Except for non-super players.
#endif
&& (spr->mobj->z >= spr->mobj->floorz)) // Without this, your shadow shows on the floor, even after you die and fall through the ground.
{
////////////////////
// SHADOW SPRITE! //
////////////////////
HWR_DrawSpriteShadow(spr, gpatch, this_scale);
}
#endif //#ifdef GLBADSHADOWS
// if it has a dispoffset, push it a little towards the camera
if (spr->dispoffset) {
float co = -gr_viewcos*(0.05f*spr->dispoffset);
@ -5407,6 +5282,12 @@ static void HWR_DrawSprites(void)
HWR_DrawPrecipitationSprite(spr);
else
#endif
{
if (spr->mobj && spr->mobj->shadowscale && cv_shadow.value)
{
HWR_DrawDropShadow(spr->mobj, spr, spr->mobj->shadowscale);
}
if (spr->mobj && spr->mobj->skin && spr->mobj->sprite == SPR_PLAY)
{
if (!cv_grmodels.value || md2_playermodels[(skin_t*)spr->mobj->skin-skins].notfound || md2_playermodels[(skin_t*)spr->mobj->skin-skins].scale < 0.0f)
@ -5427,6 +5308,7 @@ static void HWR_DrawSprites(void)
HWR_DrawSprite(spr);
}
}
}
}
}
}

7
src/r_main.c
View File

@ -129,9 +129,6 @@ consvar_t cv_flipcam = {"flipcam", "No", CV_SAVE|CV_CALL|CV_NOINIT, CV_YesNo, Fl
consvar_t cv_flipcam2 = {"flipcam2", "No", CV_SAVE|CV_CALL|CV_NOINIT, CV_YesNo, FlipCam2_OnChange, 0, NULL, NULL, 0, 0, NULL};
consvar_t cv_shadow = {"shadow", "On", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
#ifdef GLBADSHADOWS
consvar_t cv_shadowoffs = {"offsetshadows", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
#endif //#ifdef GLBADSHADOWS
consvar_t cv_skybox = {"skybox", "On", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
consvar_t cv_allowmlook = {"allowmlook", "Yes", CV_NETVAR, CV_YesNo, NULL, 0, NULL, NULL, 0, 0, NULL};
consvar_t cv_showhud = {"showhud", "Yes", CV_CALL, CV_YesNo, R_SetViewSize, 0, NULL, NULL, 0, 0, NULL};
@ -1221,10 +1218,8 @@ void R_RegisterEngineStuff(void)
CV_RegisterVar(&cv_chasecam);
CV_RegisterVar(&cv_chasecam2);
CV_RegisterVar(&cv_shadow);
#ifdef GLBADSHADOWS
CV_RegisterVar(&cv_shadowoffs);
#endif //#ifdef GLBADSHADOWS
CV_RegisterVar(&cv_skybox);
CV_RegisterVar(&cv_cam_dist);

4
src/r_main.h
View File

@ -76,10 +76,8 @@ extern consvar_t cv_showhud, cv_translucenthud;
extern consvar_t cv_homremoval;
extern consvar_t cv_chasecam, cv_chasecam2;
extern consvar_t cv_flipcam, cv_flipcam2;
extern consvar_t cv_shadow;
#ifdef GLBADSHADOWS
extern conscar_t cv_shadowoffs;
#endif //#ifdef GLBADSHADOWS
extern consvar_t cv_translucency;
extern consvar_t cv_drawdist, cv_drawdist_nights, cv_drawdist_precip;
extern consvar_t cv_fov;