[PATCH] Move r_sprite.c to common directory
No code changes, just move the file and remove the duplicate.
diff -urN a/NQ/r_sprite.c head/NQ/r_sprite.c
--- a/NQ/r_sprite.c 2006-02-19 09:16:04.000000000 +1030
+++ head/NQ/r_sprite.c 1970-01-01 09:30:00.000000000 +0930
@@ -1,381 +0,0 @@
-/*
-Copyright (C) 1996-1997 Id Software, Inc.
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-
-See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-*/
-// r_sprite.c
-
-#include "console.h"
-#include "quakedef.h"
-#include "r_local.h"
-#include "sys.h"
-
-static int clip_current;
-static vec5_t clip_verts[2][MAXWORKINGVERTS];
-static int sprite_width, sprite_height;
-
-spritedesc_t r_spritedesc;
-
-
-/*
-================
-R_RotateSprite
-================
-*/
-static void
-R_RotateSprite(float beamlength)
-{
- vec3_t vec;
-
- if (beamlength == 0.0)
- return;
-
- VectorScale(r_spritedesc.vpn, -beamlength, vec);
- VectorAdd(r_entorigin, vec, r_entorigin);
- VectorSubtract(modelorg, vec, modelorg);
-}
-
-
-/*
-=============
-R_ClipSpriteFace
-
-Clips the winding at clip_verts[clip_current] and changes clip_current
-Throws out the back side
-==============
-*/
-static int
-R_ClipSpriteFace(int nump, clipplane_t *pclipplane)
-{
- int i, outcount;
- float dists[MAXWORKINGVERTS + 1];
- float frac, clipdist, *pclipnormal;
- float *in, *instep, *outstep, *vert2;
-
- clipdist = pclipplane->dist;
- pclipnormal = pclipplane->normal;
-
-// calc dists
- if (clip_current) {
- in = clip_verts[1][0];
- outstep = clip_verts[0][0];
- clip_current = 0;
- } else {
- in = clip_verts[0][0];
- outstep = clip_verts[1][0];
- clip_current = 1;
- }
-
- instep = in;
- for (i = 0; i < nump; i++, instep += sizeof(vec5_t) / sizeof(float)) {
- dists[i] = DotProduct(instep, pclipnormal) - clipdist;
- }
-
-// handle wraparound case
- dists[nump] = dists[0];
- memcpy(instep, in, sizeof(vec5_t));
-
-
-// clip the winding
- instep = in;
- outcount = 0;
-
- for (i = 0; i < nump; i++, instep += sizeof(vec5_t) / sizeof(float)) {
- if (dists[i] >= 0) {
- memcpy(outstep, instep, sizeof(vec5_t));
- outstep += sizeof(vec5_t) / sizeof(float);
- outcount++;
- }
-
- if (dists[i] == 0 || dists[i + 1] == 0)
- continue;
-
- if ((dists[i] > 0) == (dists[i + 1] > 0))
- continue;
-
- // split it into a new vertex
- frac = dists[i] / (dists[i] - dists[i + 1]);
-
- vert2 = instep + sizeof(vec5_t) / sizeof(float);
-
- outstep[0] = instep[0] + frac * (vert2[0] - instep[0]);
- outstep[1] = instep[1] + frac * (vert2[1] - instep[1]);
- outstep[2] = instep[2] + frac * (vert2[2] - instep[2]);
- outstep[3] = instep[3] + frac * (vert2[3] - instep[3]);
- outstep[4] = instep[4] + frac * (vert2[4] - instep[4]);
-
- outstep += sizeof(vec5_t) / sizeof(float);
- outcount++;
- }
-
- return outcount;
-}
-
-
-/*
-================
-R_SetupAndDrawSprite
-================
-*/
-static void
-R_SetupAndDrawSprite()
-{
- int i, nump;
- float dot, scale, *pv;
- vec5_t *pverts;
- vec3_t left, up, right, down, transformed, local;
- emitpoint_t outverts[MAXWORKINGVERTS + 1], *pout;
-
- dot = DotProduct(r_spritedesc.vpn, modelorg);
-
-// backface cull
- if (dot >= 0)
- return;
-
-// build the sprite poster in worldspace
- VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe->right, right);
- VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe->up, up);
- VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe->left, left);
- VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe->down, down);
-
- pverts = clip_verts[0];
-
- pverts[0][0] = r_entorigin[0] + up[0] + left[0];
- pverts[0][1] = r_entorigin[1] + up[1] + left[1];
- pverts[0][2] = r_entorigin[2] + up[2] + left[2];
- pverts[0][3] = 0;
- pverts[0][4] = 0;
-
- pverts[1][0] = r_entorigin[0] + up[0] + right[0];
- pverts[1][1] = r_entorigin[1] + up[1] + right[1];
- pverts[1][2] = r_entorigin[2] + up[2] + right[2];
- pverts[1][3] = sprite_width;
- pverts[1][4] = 0;
-
- pverts[2][0] = r_entorigin[0] + down[0] + right[0];
- pverts[2][1] = r_entorigin[1] + down[1] + right[1];
- pverts[2][2] = r_entorigin[2] + down[2] + right[2];
- pverts[2][3] = sprite_width;
- pverts[2][4] = sprite_height;
-
- pverts[3][0] = r_entorigin[0] + down[0] + left[0];
- pverts[3][1] = r_entorigin[1] + down[1] + left[1];
- pverts[3][2] = r_entorigin[2] + down[2] + left[2];
- pverts[3][3] = 0;
- pverts[3][4] = sprite_height;
-
-// clip to the frustum in worldspace
- nump = 4;
- clip_current = 0;
-
- for (i = 0; i < 4; i++) {
- nump = R_ClipSpriteFace(nump, &view_clipplanes[i]);
- if (nump < 3)
- return;
- if (nump >= MAXWORKINGVERTS)
- Sys_Error("%s: too many points", __func__);
- }
-
-// transform vertices into viewspace and project
- pv = &clip_verts[clip_current][0][0];
- r_spritedesc.nearzi = -999999;
-
- for (i = 0; i < nump; i++) {
- VectorSubtract(pv, r_origin, local);
- TransformVector(local, transformed);
-
- if (transformed[2] < NEAR_CLIP)
- transformed[2] = NEAR_CLIP;
-
- pout = &outverts[i];
- pout->zi = 1.0 / transformed[2];
- if (pout->zi > r_spritedesc.nearzi)
- r_spritedesc.nearzi = pout->zi;
-
- pout->s = pv[3];
- pout->t = pv[4];
-
- scale = xscale * pout->zi;
- pout->u = (xcenter + scale * transformed[0]);
-
- scale = yscale * pout->zi;
- pout->v = (ycenter - scale * transformed[1]);
-
- pv += sizeof(vec5_t) / sizeof(*pv);
- }
-
-// draw it
- r_spritedesc.nump = nump;
- r_spritedesc.pverts = outverts;
- D_DrawSprite();
-}
-
-
-/*
-================
-R_GetSpriteframe
-================
-*/
-static mspriteframe_t *
-R_GetSpriteframe(msprite_t *psprite)
-{
- mspritegroup_t *pspritegroup;
- mspriteframe_t *pspriteframe;
- int i, numframes, frame;
- float *pintervals, fullinterval, targettime, time;
-
- frame = currententity->frame;
-
- if ((frame >= psprite->numframes) || (frame < 0)) {
- Con_Printf("R_DrawSprite: no such frame %d\n", frame);
- frame = 0;
- }
-
- if (psprite->frames[frame].type == SPR_SINGLE) {
- pspriteframe = psprite->frames[frame].frameptr;
- } else {
- pspritegroup = (mspritegroup_t *)psprite->frames[frame].frameptr;
- pintervals = pspritegroup->intervals;
- numframes = pspritegroup->numframes;
- fullinterval = pintervals[numframes - 1];
-
- time = cl.time + currententity->syncbase;
-
- // when loading in Mod_LoadSpriteGroup, we guaranteed all interval values
- // are positive, so we don't have to worry about division by 0
- targettime = time - ((int)(time / fullinterval)) * fullinterval;
-
- for (i = 0; i < (numframes - 1); i++) {
- if (pintervals[i] > targettime)
- break;
- }
-
- pspriteframe = pspritegroup->frames[i];
- }
-
- return pspriteframe;
-}
-
-
-/*
-================
-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 = sin(angle);
- cr = cos(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("%s: Bad sprite type %d", __func__, psprite->type);
- }
-
- R_RotateSprite(psprite->beamlength);
-
- R_SetupAndDrawSprite();
-}
diff -urN a/QW/client/r_sprite.c head/QW/client/r_sprite.c
--- a/QW/client/r_sprite.c 2006-02-19 09:16:04.000000000 +1030
+++ head/QW/client/r_sprite.c 1970-01-01 09:30:00.000000000 +0930
@@ -1,381 +0,0 @@
-/*
-Copyright (C) 1996-1997 Id Software, Inc.
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either version 2
-of the License, or (at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-
-See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
-*/
-// r_sprite.c
-
-#include "console.h"
-#include "quakedef.h"
-#include "r_local.h"
-#include "sys.h"
-
-static int clip_current;
-static vec5_t clip_verts[2][MAXWORKINGVERTS];
-static int sprite_width, sprite_height;
-
-spritedesc_t r_spritedesc;
-
-
-/*
-================
-R_RotateSprite
-================
-*/
-static void
-R_RotateSprite(float beamlength)
-{
- vec3_t vec;
-
- if (beamlength == 0.0)
- return;
-
- VectorScale(r_spritedesc.vpn, -beamlength, vec);
- VectorAdd(r_entorigin, vec, r_entorigin);
- VectorSubtract(modelorg, vec, modelorg);
-}
-
-
-/*
-=============
-R_ClipSpriteFace
-
-Clips the winding at clip_verts[clip_current] and changes clip_current
-Throws out the back side
-==============
-*/
-static int
-R_ClipSpriteFace(int nump, clipplane_t *pclipplane)
-{
- int i, outcount;
- float dists[MAXWORKINGVERTS + 1];
- float frac, clipdist, *pclipnormal;
- float *in, *instep, *outstep, *vert2;
-
- clipdist = pclipplane->dist;
- pclipnormal = pclipplane->normal;
-
-// calc dists
- if (clip_current) {
- in = clip_verts[1][0];
- outstep = clip_verts[0][0];
- clip_current = 0;
- } else {
- in = clip_verts[0][0];
- outstep = clip_verts[1][0];
- clip_current = 1;
- }
-
- instep = in;
- for (i = 0; i < nump; i++, instep += sizeof(vec5_t) / sizeof(float)) {
- dists[i] = DotProduct(instep, pclipnormal) - clipdist;
- }
-
-// handle wraparound case
- dists[nump] = dists[0];
- memcpy(instep, in, sizeof(vec5_t));
-
-
-// clip the winding
- instep = in;
- outcount = 0;
-
- for (i = 0; i < nump; i++, instep += sizeof(vec5_t) / sizeof(float)) {
- if (dists[i] >= 0) {
- memcpy(outstep, instep, sizeof(vec5_t));
- outstep += sizeof(vec5_t) / sizeof(float);
- outcount++;
- }
-
- if (dists[i] == 0 || dists[i + 1] == 0)
- continue;
-
- if ((dists[i] > 0) == (dists[i + 1] > 0))
- continue;
-
- // split it into a new vertex
- frac = dists[i] / (dists[i] - dists[i + 1]);
-
- vert2 = instep + sizeof(vec5_t) / sizeof(float);
-
- outstep[0] = instep[0] + frac * (vert2[0] - instep[0]);
- outstep[1] = instep[1] + frac * (vert2[1] - instep[1]);
- outstep[2] = instep[2] + frac * (vert2[2] - instep[2]);
- outstep[3] = instep[3] + frac * (vert2[3] - instep[3]);
- outstep[4] = instep[4] + frac * (vert2[4] - instep[4]);
-
- outstep += sizeof(vec5_t) / sizeof(float);
- outcount++;
- }
-
- return outcount;
-}
-
-
-/*
-================
-R_SetupAndDrawSprite
-================
-*/
-static void
-R_SetupAndDrawSprite()
-{
- int i, nump;
- float dot, scale, *pv;
- vec5_t *pverts;
- vec3_t left, up, right, down, transformed, local;
- emitpoint_t outverts[MAXWORKINGVERTS + 1], *pout;
-
- dot = DotProduct(r_spritedesc.vpn, modelorg);
-
-// backface cull
- if (dot >= 0)
- return;
-
-// build the sprite poster in worldspace
- VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe->right, right);
- VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe->up, up);
- VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe->left, left);
- VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe->down, down);
-
- pverts = clip_verts[0];
-
- pverts[0][0] = r_entorigin[0] + up[0] + left[0];
- pverts[0][1] = r_entorigin[1] + up[1] + left[1];
- pverts[0][2] = r_entorigin[2] + up[2] + left[2];
- pverts[0][3] = 0;
- pverts[0][4] = 0;
-
- pverts[1][0] = r_entorigin[0] + up[0] + right[0];
- pverts[1][1] = r_entorigin[1] + up[1] + right[1];
- pverts[1][2] = r_entorigin[2] + up[2] + right[2];
- pverts[1][3] = sprite_width;
- pverts[1][4] = 0;
-
- pverts[2][0] = r_entorigin[0] + down[0] + right[0];
- pverts[2][1] = r_entorigin[1] + down[1] + right[1];
- pverts[2][2] = r_entorigin[2] + down[2] + right[2];
- pverts[2][3] = sprite_width;
- pverts[2][4] = sprite_height;
-
- pverts[3][0] = r_entorigin[0] + down[0] + left[0];
- pverts[3][1] = r_entorigin[1] + down[1] + left[1];
- pverts[3][2] = r_entorigin[2] + down[2] + left[2];
- pverts[3][3] = 0;
- pverts[3][4] = sprite_height;
-
-// clip to the frustum in worldspace
- nump = 4;
- clip_current = 0;
-
- for (i = 0; i < 4; i++) {
- nump = R_ClipSpriteFace(nump, &view_clipplanes[i]);
- if (nump < 3)
- return;
- if (nump >= MAXWORKINGVERTS)
- Sys_Error("%s: too many points", __func__);
- }
-
-// transform vertices into viewspace and project
- pv = &clip_verts[clip_current][0][0];
- r_spritedesc.nearzi = -999999;
-
- for (i = 0; i < nump; i++) {
- VectorSubtract(pv, r_origin, local);
- TransformVector(local, transformed);
-
- if (transformed[2] < NEAR_CLIP)
- transformed[2] = NEAR_CLIP;
-
- pout = &outverts[i];
- pout->zi = 1.0 / transformed[2];
- if (pout->zi > r_spritedesc.nearzi)
- r_spritedesc.nearzi = pout->zi;
-
- pout->s = pv[3];
- pout->t = pv[4];
-
- scale = xscale * pout->zi;
- pout->u = (xcenter + scale * transformed[0]);
-
- scale = yscale * pout->zi;
- pout->v = (ycenter - scale * transformed[1]);
-
- pv += sizeof(vec5_t) / sizeof(*pv);
- }
-
-// draw it
- r_spritedesc.nump = nump;
- r_spritedesc.pverts = outverts;
- D_DrawSprite();
-}
-
-
-/*
-================
-R_GetSpriteframe
-================
-*/
-static mspriteframe_t *
-R_GetSpriteframe(msprite_t *psprite)
-{
- mspritegroup_t *pspritegroup;
- mspriteframe_t *pspriteframe;
- int i, numframes, frame;
- float *pintervals, fullinterval, targettime, time;
-
- frame = currententity->frame;
-
- if ((frame >= psprite->numframes) || (frame < 0)) {
- Con_Printf("R_DrawSprite: no such frame %d\n", frame);
- frame = 0;
- }
-
- if (psprite->frames[frame].type == SPR_SINGLE) {
- pspriteframe = psprite->frames[frame].frameptr;
- } else {
- pspritegroup = (mspritegroup_t *)psprite->frames[frame].frameptr;
- pintervals = pspritegroup->intervals;
- numframes = pspritegroup->numframes;
- fullinterval = pintervals[numframes - 1];
-
- time = cl.time + currententity->syncbase;
-
- // when loading in Mod_LoadSpriteGroup, we guaranteed all interval values
- // are positive, so we don't have to worry about division by 0
- targettime = time - ((int)(time / fullinterval)) * fullinterval;
-
- for (i = 0; i < (numframes - 1); i++) {
- if (pintervals[i] > targettime)
- break;
- }
-
- pspriteframe = pspritegroup->frames[i];
- }
-
- return pspriteframe;
-}
-
-
-/*
-================
-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 = sin(angle);
- cr = cos(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("%s: Bad sprite type %d", __func__, psprite->type);
- }
-
- R_RotateSprite(psprite->beamlength);
-
- R_SetupAndDrawSprite();
-}
diff -urN a/common/r_sprite.c head/common/r_sprite.c
--- a/common/r_sprite.c 1970-01-01 09:30:00.000000000 +0930
+++ head/common/r_sprite.c 2006-02-19 09:09:33.000000000 +1030
@@ -0,0 +1,381 @@
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+*/
+// r_sprite.c
+
+#include "console.h"
+#include "quakedef.h"
+#include "r_local.h"
+#include "sys.h"
+
+static int clip_current;
+static vec5_t clip_verts[2][MAXWORKINGVERTS];
+static int sprite_width, sprite_height;
+
+spritedesc_t r_spritedesc;
+
+
+/*
+================
+R_RotateSprite
+================
+*/
+static void
+R_RotateSprite(float beamlength)
+{
+ vec3_t vec;
+
+ if (beamlength == 0.0)
+ return;
+
+ VectorScale(r_spritedesc.vpn, -beamlength, vec);
+ VectorAdd(r_entorigin, vec, r_entorigin);
+ VectorSubtract(modelorg, vec, modelorg);
+}
+
+
+/*
+=============
+R_ClipSpriteFace
+
+Clips the winding at clip_verts[clip_current] and changes clip_current
+Throws out the back side
+==============
+*/
+static int
+R_ClipSpriteFace(int nump, clipplane_t *pclipplane)
+{
+ int i, outcount;
+ float dists[MAXWORKINGVERTS + 1];
+ float frac, clipdist, *pclipnormal;
+ float *in, *instep, *outstep, *vert2;
+
+ clipdist = pclipplane->dist;
+ pclipnormal = pclipplane->normal;
+
+// calc dists
+ if (clip_current) {
+ in = clip_verts[1][0];
+ outstep = clip_verts[0][0];
+ clip_current = 0;
+ } else {
+ in = clip_verts[0][0];
+ outstep = clip_verts[1][0];
+ clip_current = 1;
+ }
+
+ instep = in;
+ for (i = 0; i < nump; i++, instep += sizeof(vec5_t) / sizeof(float)) {
+ dists[i] = DotProduct(instep, pclipnormal) - clipdist;
+ }
+
+// handle wraparound case
+ dists[nump] = dists[0];
+ memcpy(instep, in, sizeof(vec5_t));
+
+
+// clip the winding
+ instep = in;
+ outcount = 0;
+
+ for (i = 0; i < nump; i++, instep += sizeof(vec5_t) / sizeof(float)) {
+ if (dists[i] >= 0) {
+ memcpy(outstep, instep, sizeof(vec5_t));
+ outstep += sizeof(vec5_t) / sizeof(float);
+ outcount++;
+ }
+
+ if (dists[i] == 0 || dists[i + 1] == 0)
+ continue;
+
+ if ((dists[i] > 0) == (dists[i + 1] > 0))
+ continue;
+
+ // split it into a new vertex
+ frac = dists[i] / (dists[i] - dists[i + 1]);
+
+ vert2 = instep + sizeof(vec5_t) / sizeof(float);
+
+ outstep[0] = instep[0] + frac * (vert2[0] - instep[0]);
+ outstep[1] = instep[1] + frac * (vert2[1] - instep[1]);
+ outstep[2] = instep[2] + frac * (vert2[2] - instep[2]);
+ outstep[3] = instep[3] + frac * (vert2[3] - instep[3]);
+ outstep[4] = instep[4] + frac * (vert2[4] - instep[4]);
+
+ outstep += sizeof(vec5_t) / sizeof(float);
+ outcount++;
+ }
+
+ return outcount;
+}
+
+
+/*
+================
+R_SetupAndDrawSprite
+================
+*/
+static void
+R_SetupAndDrawSprite()
+{
+ int i, nump;
+ float dot, scale, *pv;
+ vec5_t *pverts;
+ vec3_t left, up, right, down, transformed, local;
+ emitpoint_t outverts[MAXWORKINGVERTS + 1], *pout;
+
+ dot = DotProduct(r_spritedesc.vpn, modelorg);
+
+// backface cull
+ if (dot >= 0)
+ return;
+
+// build the sprite poster in worldspace
+ VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe->right, right);
+ VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe->up, up);
+ VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe->left, left);
+ VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe->down, down);
+
+ pverts = clip_verts[0];
+
+ pverts[0][0] = r_entorigin[0] + up[0] + left[0];
+ pverts[0][1] = r_entorigin[1] + up[1] + left[1];
+ pverts[0][2] = r_entorigin[2] + up[2] + left[2];
+ pverts[0][3] = 0;
+ pverts[0][4] = 0;
+
+ pverts[1][0] = r_entorigin[0] + up[0] + right[0];
+ pverts[1][1] = r_entorigin[1] + up[1] + right[1];
+ pverts[1][2] = r_entorigin[2] + up[2] + right[2];
+ pverts[1][3] = sprite_width;
+ pverts[1][4] = 0;
+
+ pverts[2][0] = r_entorigin[0] + down[0] + right[0];
+ pverts[2][1] = r_entorigin[1] + down[1] + right[1];
+ pverts[2][2] = r_entorigin[2] + down[2] + right[2];
+ pverts[2][3] = sprite_width;
+ pverts[2][4] = sprite_height;
+
+ pverts[3][0] = r_entorigin[0] + down[0] + left[0];
+ pverts[3][1] = r_entorigin[1] + down[1] + left[1];
+ pverts[3][2] = r_entorigin[2] + down[2] + left[2];
+ pverts[3][3] = 0;
+ pverts[3][4] = sprite_height;
+
+// clip to the frustum in worldspace
+ nump = 4;
+ clip_current = 0;
+
+ for (i = 0; i < 4; i++) {
+ nump = R_ClipSpriteFace(nump, &view_clipplanes[i]);
+ if (nump < 3)
+ return;
+ if (nump >= MAXWORKINGVERTS)
+ Sys_Error("%s: too many points", __func__);
+ }
+
+// transform vertices into viewspace and project
+ pv = &clip_verts[clip_current][0][0];
+ r_spritedesc.nearzi = -999999;
+
+ for (i = 0; i < nump; i++) {
+ VectorSubtract(pv, r_origin, local);
+ TransformVector(local, transformed);
+
+ if (transformed[2] < NEAR_CLIP)
+ transformed[2] = NEAR_CLIP;
+
+ pout = &outverts[i];
+ pout->zi = 1.0 / transformed[2];
+ if (pout->zi > r_spritedesc.nearzi)
+ r_spritedesc.nearzi = pout->zi;
+
+ pout->s = pv[3];
+ pout->t = pv[4];
+
+ scale = xscale * pout->zi;
+ pout->u = (xcenter + scale * transformed[0]);
+
+ scale = yscale * pout->zi;
+ pout->v = (ycenter - scale * transformed[1]);
+
+ pv += sizeof(vec5_t) / sizeof(*pv);
+ }
+
+// draw it
+ r_spritedesc.nump = nump;
+ r_spritedesc.pverts = outverts;
+ D_DrawSprite();
+}
+
+
+/*
+================
+R_GetSpriteframe
+================
+*/
+static mspriteframe_t *
+R_GetSpriteframe(msprite_t *psprite)
+{
+ mspritegroup_t *pspritegroup;
+ mspriteframe_t *pspriteframe;
+ int i, numframes, frame;
+ float *pintervals, fullinterval, targettime, time;
+
+ frame = currententity->frame;
+
+ if ((frame >= psprite->numframes) || (frame < 0)) {
+ Con_Printf("R_DrawSprite: no such frame %d\n", frame);
+ frame = 0;
+ }
+
+ if (psprite->frames[frame].type == SPR_SINGLE) {
+ pspriteframe = psprite->frames[frame].frameptr;
+ } else {
+ pspritegroup = (mspritegroup_t *)psprite->frames[frame].frameptr;
+ pintervals = pspritegroup->intervals;
+ numframes = pspritegroup->numframes;
+ fullinterval = pintervals[numframes - 1];
+
+ time = cl.time + currententity->syncbase;
+
+ // when loading in Mod_LoadSpriteGroup, we guaranteed all interval values
+ // are positive, so we don't have to worry about division by 0
+ targettime = time - ((int)(time / fullinterval)) * fullinterval;
+
+ for (i = 0; i < (numframes - 1); i++) {
+ if (pintervals[i] > targettime)
+ break;
+ }
+
+ pspriteframe = pspritegroup->frames[i];
+ }
+
+ return pspriteframe;
+}
+
+
+/*
+================
+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 = sin(angle);
+ cr = cos(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("%s: Bad sprite type %d", __func__, psprite->type);
+ }
+
+ R_RotateSprite(psprite->beamlength);
+
+ R_SetupAndDrawSprite();
+}