/*
================
R_DrawSprite
================
*/
void R_DrawSprite (void)
{
int i;
msprite_t *psprite;
vec3_t tvec;
float dot, angle, sr, cr;
psprite = currententity->model->cache.data;
r_spritedesc.pspriteframe = R_GetSpriteframe (psprite);
sprite_width = r_spritedesc.pspriteframe->width;
sprite_height = r_spritedesc.pspriteframe->height;
// TODO: make this caller-selectable
if (psprite->type == SPR_FACING_UPRIGHT)
{
// generate the sprite's axes, with vup straight up in worldspace, and
// r_spritedesc.vright perpendicular to modelorg.
// This will not work if the view direction is very close to straight up or
// down, because the cross product will be between two nearly parallel
// vectors and starts to approach an undefined state, so we don't draw if
// the two vectors are less than 1 degree apart
tvec[0] = -modelorg[0];
tvec[1] = -modelorg[1];
tvec[2] = -modelorg[2];
VectorNormalize (tvec);
dot = tvec[2]; // same as DotProduct (tvec, r_spritedesc.vup) because
// r_spritedesc.vup is 0, 0, 1
if ((dot > 0.999848) || (dot < -0.999848)) // cos(1 degree) = 0.999848
return;
r_spritedesc.vup[0] = 0;
r_spritedesc.vup[1] = 0;
r_spritedesc.vup[2] = 1;
r_spritedesc.vright[0] = tvec[1];
// CrossProduct(r_spritedesc.vup, -modelorg,
r_spritedesc.vright[1] = -tvec[0];
// r_spritedesc.vright)
r_spritedesc.vright[2] = 0;
VectorNormalize (r_spritedesc.vright);
r_spritedesc.vpn[0] = -r_spritedesc.vright[1];
r_spritedesc.vpn[1] = r_spritedesc.vright[0];
r_spritedesc.vpn[2] = 0;
// CrossProduct (r_spritedesc.vright, r_spritedesc.vup,
// r_spritedesc.vpn)
}
else if (psprite->type == SPR_VP_PARALLEL)
{
// generate the sprite's axes, completely parallel to the viewplane. There
// are no problem situations, because the sprite is always in the same
// position relative to the viewer
for (i=0 ; i<3 ; i++)
{
r_spritedesc.vup[i] = vup[i];
r_spritedesc.vright[i] = vright[i];
r_spritedesc.vpn[i] = vpn[i];
}
}
else if (psprite->type == SPR_VP_PARALLEL_UPRIGHT)
{
// generate the sprite's axes, with vup straight up in worldspace, and
// r_spritedesc.vright parallel to the viewplane.
// This will not work if the view direction is very close to straight up or
// down, because the cross product will be between two nearly parallel
// vectors and starts to approach an undefined state, so we don't draw if
// the two vectors are less than 1 degree apart
dot = vpn[2]; // same as DotProduct (vpn, r_spritedesc.vup) because
// r_spritedesc.vup is 0, 0, 1
if ((dot > 0.999848) || (dot < -0.999848)) // cos(1 degree) = 0.999848
return;
r_spritedesc.vup[0] = 0;
r_spritedesc.vup[1] = 0;
r_spritedesc.vup[2] = 1;
r_spritedesc.vright[0] = vpn[1];
// CrossProduct (r_spritedesc.vup, vpn,
r_spritedesc.vright[1] = -vpn[0]; // r_spritedesc.vright)
r_spritedesc.vright[2] = 0;
VectorNormalize (r_spritedesc.vright);
r_spritedesc.vpn[0] = -r_spritedesc.vright[1];
r_spritedesc.vpn[1] = r_spritedesc.vright[0];
r_spritedesc.vpn[2] = 0;
// CrossProduct (r_spritedesc.vright, r_spritedesc.vup,
// r_spritedesc.vpn)
}
else if (psprite->type == SPR_ORIENTED)
{
// generate the sprite's axes, according to the sprite's world orientation
AngleVectors (currententity->angles, r_spritedesc.vpn,
r_spritedesc.vright, r_spritedesc.vup);
}
else if (psprite->type == SPR_VP_PARALLEL_ORIENTED)
{
// generate the sprite's axes, parallel to the viewplane, but rotated in
// that plane around the center according to the sprite entity's roll
// angle. So vpn stays the same, but vright and vup rotate
angle = currententity->angles[ROLL] * (M_PI*2 / 360);
sr = sinf(angle);
cr = cosf(angle);
for (i=0 ; i<3 ; i++)
{
r_spritedesc.vpn[i] = vpn[i];
r_spritedesc.vright[i] = vright[i] * cr + vup[i] * sr;
r_spritedesc.vup[i] = vright[i] * -sr + vup[i] * cr;
}
}
else
{
Sys_Error ("R_DrawSprite: Bad sprite type %d", psprite->type);
}
R_RotateSprite (psprite->beamlength);
R_SetupAndDrawSprite ();
}
static void R_Model_Sprite_Draw_TransparentCallback(const entity_render_t *ent, const rtlight_t *rtlight, int numsurfaces, int *surfacelist)
{
int i;
dp_model_t *model = ent->model;
vec3_t left, up, org, mforward, mleft, mup, middle;
float scale, dx, dy, hud_vs_screen;
int edge = 0;
float dir_angle = 0.0f;
float vertex3f[12];
// nudge it toward the view to make sure it isn't in a wall
Matrix4x4_ToVectors(&ent->matrix, mforward, mleft, mup, org);
VectorSubtract(org, r_refdef.view.forward, org);
switch(model->sprite.sprnum_type)
{
case SPR_VP_PARALLEL_UPRIGHT:
// flames and such
// vertical beam sprite, faces view plane
scale = ent->scale / sqrt(r_refdef.view.forward[0]*r_refdef.view.forward[0]+r_refdef.view.forward[1]*r_refdef.view.forward[1]);
left[0] = -r_refdef.view.forward[1] * scale;
left[1] = r_refdef.view.forward[0] * scale;
left[2] = 0;
up[0] = 0;
up[1] = 0;
up[2] = ent->scale;
break;
case SPR_FACING_UPRIGHT:
// flames and such
// vertical beam sprite, faces viewer's origin (not the view plane)
scale = ent->scale / sqrt((org[0] - r_refdef.view.origin[0])*(org[0] - r_refdef.view.origin[0])+(org[1] - r_refdef.view.origin[1])*(org[1] - r_refdef.view.origin[1]));
left[0] = (org[1] - r_refdef.view.origin[1]) * scale;
left[1] = -(org[0] - r_refdef.view.origin[0]) * scale;
left[2] = 0;
up[0] = 0;
up[1] = 0;
up[2] = ent->scale;
break;
default:
Con_Printf("R_SpriteSetup: unknown sprite type %i\n", model->sprite.sprnum_type);
// fall through to normal sprite
case SPR_VP_PARALLEL:
// normal sprite
// faces view plane
VectorScale(r_refdef.view.left, ent->scale, left);
VectorScale(r_refdef.view.up, ent->scale, up);
break;
case SPR_LABEL_SCALE:
// normal sprite
// faces view plane
// fixed HUD pixel size specified in sprite
// honors scale
// honors a global label scaling cvar
if(r_fb.water.renderingscene) // labels are considered HUD items, and don't appear in reflections
return;
// See the R_TrackSprite definition for a reason for this copying
VectorCopy(r_refdef.view.left, left);
VectorCopy(r_refdef.view.up, up);
// It has to be done before the calculations, because it moves the origin.
if(r_track_sprites.integer)
R_TrackSprite(ent, org, left, up, &edge, &dir_angle);
scale = 2 * ent->scale * (DotProduct(r_refdef.view.forward, org) - DotProduct(r_refdef.view.forward, r_refdef.view.origin)) * r_labelsprites_scale.value;
VectorScale(left, scale * r_refdef.view.frustum_x / vid_conwidth.integer, left); // 1px
VectorScale(up, scale * r_refdef.view.frustum_y / vid_conheight.integer, up); // 1px
break;
case SPR_LABEL:
// normal sprite
// faces view plane
// fixed pixel size specified in sprite
// tries to get the right size in HUD units, if possible
// ignores scale
// honors a global label scaling cvar before the rounding
// FIXME assumes that 1qu is 1 pixel in the sprite like in SPR32 format. Should not do that, but instead query the source image! This bug only applies to the roundtopixels case, though.
if(r_fb.water.renderingscene) // labels are considered HUD items, and don't appear in reflections
return;
// See the R_TrackSprite definition for a reason for this copying
VectorCopy(r_refdef.view.left, left);
VectorCopy(r_refdef.view.up, up);
// It has to be done before the calculations, because it moves the origin.
if(r_track_sprites.integer)
R_TrackSprite(ent, org, left, up, &edge, &dir_angle);
scale = 2 * (DotProduct(r_refdef.view.forward, org) - DotProduct(r_refdef.view.forward, r_refdef.view.origin));
if(r_labelsprites_roundtopixels.integer)
{
hud_vs_screen = max(
vid_conwidth.integer / (float) r_refdef.view.width,
vid_conheight.integer / (float) r_refdef.view.height
) / max(0.125, r_labelsprites_scale.value);
// snap to "good sizes"
// 1 for (0.6, 1.41]
// 2 for (1.8, 3.33]
if(hud_vs_screen <= 0.6)
hud_vs_screen = 0; // don't, use real HUD pixels
else if(hud_vs_screen <= 1.41)
hud_vs_screen = 1;
else if(hud_vs_screen <= 3.33)
hud_vs_screen = 2;
else
hud_vs_screen = 0; // don't, use real HUD pixels
if(hud_vs_screen)
{
// use screen pixels
VectorScale(left, scale * r_refdef.view.frustum_x / (r_refdef.view.width * hud_vs_screen), left); // 1px
VectorScale(up, scale * r_refdef.view.frustum_y / (r_refdef.view.height * hud_vs_screen), up); // 1px
}
else
{
// use HUD pixels
VectorScale(left, scale * r_refdef.view.frustum_x / vid_conwidth.integer * r_labelsprites_scale.value, left); // 1px
VectorScale(up, scale * r_refdef.view.frustum_y / vid_conheight.integer * r_labelsprites_scale.value, up); // 1px
}
if(hud_vs_screen == 1)
{
VectorMA(r_refdef.view.origin, scale, r_refdef.view.forward, middle); // center of screen in distance scale
dx = 0.5 - fmod(r_refdef.view.width * 0.5 + (DotProduct(org, left) - DotProduct(middle, left)) / DotProduct(left, left) + 0.5, 1.0);
dy = 0.5 - fmod(r_refdef.view.height * 0.5 + (DotProduct(org, up) - DotProduct(middle, up)) / DotProduct(up, up) + 0.5, 1.0);
VectorMAMAM(1, org, dx, left, dy, up, org);
}
}
else
{
// use HUD pixels
VectorScale(left, scale * r_refdef.view.frustum_x / vid_conwidth.integer * r_labelsprites_scale.value, left); // 1px
VectorScale(up, scale * r_refdef.view.frustum_y / vid_conheight.integer * r_labelsprites_scale.value, up); // 1px
}
break;
case SPR_ORIENTED:
// bullet marks on walls
// ignores viewer entirely
VectorCopy(mleft, left);
VectorCopy(mup, up);
break;
case SPR_VP_PARALLEL_ORIENTED:
// I have no idea what people would use this for...
// oriented relative to view space
// FIXME: test this and make sure it mimicks software
left[0] = mleft[0] * r_refdef.view.forward[0] + mleft[1] * r_refdef.view.left[0] + mleft[2] * r_refdef.view.up[0];
left[1] = mleft[0] * r_refdef.view.forward[1] + mleft[1] * r_refdef.view.left[1] + mleft[2] * r_refdef.view.up[1];
left[2] = mleft[0] * r_refdef.view.forward[2] + mleft[1] * r_refdef.view.left[2] + mleft[2] * r_refdef.view.up[2];
up[0] = mup[0] * r_refdef.view.forward[0] + mup[1] * r_refdef.view.left[0] + mup[2] * r_refdef.view.up[0];
up[1] = mup[0] * r_refdef.view.forward[1] + mup[1] * r_refdef.view.left[1] + mup[2] * r_refdef.view.up[1];
up[2] = mup[0] * r_refdef.view.forward[2] + mup[1] * r_refdef.view.left[2] + mup[2] * r_refdef.view.up[2];
break;
case SPR_OVERHEAD:
// Overhead games sprites, have some special hacks to look good
VectorScale(r_refdef.view.left, ent->scale * r_overheadsprites_scalex.value, left);
VectorScale(r_refdef.view.up, ent->scale * r_overheadsprites_scaley.value, up);
VectorSubtract(org, r_refdef.view.origin, middle);
VectorNormalize(middle);
// offset and rotate
dir_angle = r_overheadsprites_perspective.value * (1 - fabs(DotProduct(middle, r_refdef.view.forward)));
up[2] = up[2] + dir_angle;
VectorNormalize(up);
VectorScale(up, ent->scale * r_overheadsprites_scaley.value, up);
// offset (move nearer to player, yz is camera plane)
org[0] = org[0] - middle[0]*r_overheadsprites_pushback.value;
org[1] = org[1] - middle[1]*r_overheadsprites_pushback.value;
org[2] = org[2] - middle[2]*r_overheadsprites_pushback.value;
// little perspective effect
up[2] = up[2] + dir_angle * 0.3;
// a bit of counter-camera rotation
up[0] = up[0] + r_refdef.view.forward[0] * 0.07;
up[1] = up[1] + r_refdef.view.forward[1] * 0.07;
up[2] = up[2] + r_refdef.view.forward[2] * 0.07;
break;
}
// LordHavoc: interpolated sprite rendering
for (i = 0;i < MAX_FRAMEBLENDS;i++)
{
if (ent->frameblend[i].lerp >= 0.01f)
{
mspriteframe_t *frame;
texture_t *texture;
RSurf_ActiveCustomEntity(&identitymatrix, &identitymatrix, ent->flags, 0, ent->colormod[0], ent->colormod[1], ent->colormod[2], ent->alpha * ent->frameblend[i].lerp, 4, vertex3f, spritetexcoord2f, NULL, NULL, NULL, NULL, 2, polygonelement3i, polygonelement3s, false, false);
frame = model->sprite.sprdata_frames + ent->frameblend[i].subframe;
texture = R_GetCurrentTexture(model->data_textures + ent->frameblend[i].subframe);
// lit sprite by lightgrid if it is not fullbright, lit only ambient
if (!(texture->currentmaterialflags & MATERIALFLAG_FULLBRIGHT))
VectorAdd(ent->modellight_ambient, ent->modellight_diffuse, rsurface.modellight_ambient); // sprites dont use lightdirection
// SPR_LABEL should not use depth test AT ALL
if(model->sprite.sprnum_type == SPR_LABEL || model->sprite.sprnum_type == SPR_LABEL_SCALE)
if(texture->currentmaterialflags & MATERIALFLAG_SHORTDEPTHRANGE)
texture->currentmaterialflags = (texture->currentmaterialflags & ~MATERIALFLAG_SHORTDEPTHRANGE) | MATERIALFLAG_NODEPTHTEST;
if(edge)
{
// FIXME:: save vectors/origin and re-rotate? necessary if the hotspot can change per frame
R_RotateSprite(frame, org, left, up, edge, dir_angle);
edge = 0;
}
R_CalcSprite_Vertex3f(vertex3f, org, left, up, frame->left, frame->right, frame->down, frame->up);
R_DrawCustomSurface_Texture(texture, &identitymatrix, texture->currentmaterialflags, 0, 4, 0, 2, false, false);
}
}
rsurface.entity = NULL;
}
