r_lerpanim.c

   1 #include "quakedef.h"
   2
   3 // LordHavoc: quite tempting to break apart this function to reuse the
   4 //            duplicated code, but I suspect it is better for performance
   5 //            this way
   6 // LordHavoc: later note: made FRAMEBLENDINSERT macro
   7 void R_LerpAnimation(entity_render_t *r)
   8 {
   9         int sub1, sub2, numframes, f, i;
  10         double sublerp, lerp, d;
  11         animscene_t *scene;
  12         frameblend_t *blend;
  13
  14         if (!r->model || !r->model->type)
  15                 return;
  16
  17         blend = r->frameblend;
  18
  19         numframes = r->model->numframes;
  20
  21         if (r->frame1 >= numframes)
  22         {
  23                 Con_DPrintf("CL_LerpAnimation: no such frame %d\n", r->frame1);
  24                 r->frame1 = 0;
  25         }
  26
  27         if (r->frame2 >= numframes)
  28         {
  29                 Con_DPrintf("CL_LerpAnimation: no such frame %d\n", r->frame2);
  30                 r->frame2 = 0;
  31         }
  32
  33         // note: this could be removed, if the rendering code allows an empty blend array
  34         if (r->frame1 < 0)
  35         {
  36                 Con_Printf ("CL_LerpAnimation: frame1 is NULL\n");
  37                 r->frame1 = 0;
  38         }
  39
  40         // check r_lerpmodels and round off very close blend percentages
  41         if (!r_lerpmodels.integer)
  42                 r->framelerp = 1;
  43         else if (r->framelerp >= (65535.0f / 65536.0f))
  44                 r->framelerp = 1;
  45         else if (r->framelerp < (1.0f / 65536.0f))
  46                 r->framelerp = 0;
  47
  48         blend[0].frame = blend[1].frame = blend[2].frame = blend[3].frame = 0;
  49         blend[0].lerp = blend[1].lerp = blend[2].lerp = blend[3].lerp = 0;
  50         if (r->model->animscenes)
  51         {
  52                 if (r->framelerp < 1 && r->frame1 >= 0)
  53                 {
  54                         scene = r->model->animscenes + r->frame1;
  55                         lerp = 1 - r->framelerp;
  56
  57                         if (scene->framecount > 1)
  58                         {
  59                                 sublerp = scene->framerate * (cl.time - r->frame1time);
  60                                 sub1 = (int) (sublerp);
  61                                 sub2 = sub1 + 1;
  62                                 sublerp -= sub1;
  63                                 if (!r_lerpmodels.integer)
  64                                         sublerp = 1;
  65                                 else if (sublerp >= (65535.0f / 65536.0f))
  66                                         sublerp = 1;
  67                                 else if (sublerp < (1.0f / 65536.0f))
  68                                         sublerp = 0;
  69                                 if (scene->loop)
  70                                 {
  71                                         sub1 = (sub1 % scene->framecount);
  72                                         sub2 = (sub2 % scene->framecount);
  73                                 }
  74                                 sub1 = bound(0, sub1, (scene->framecount - 1)) + scene->firstframe;
  75                                 sub2 = bound(0, sub2, (scene->framecount - 1)) + scene->firstframe;
  76                                 f = sub1;
  77                                 d = (1 - sublerp) * lerp;
  78 #define FRAMEBLENDINSERT\
  79                                 if (d > 0)\
  80                                 {\
  81                                         for (i = 0;i < 4;i++)\
  82                                         {\
  83                                                 if (blend[i].frame == f)\
  84                                                 {\
  85                                                         blend[i].lerp += d;\
  86                                                         break;\
  87                                                 }\
  88                                                 if (blend[i].lerp <= 0)\
  89                                                 {\
  90                                                         blend[i].frame = f;\
  91                                                         blend[i].lerp = d;\
  92                                                         break;\
  93                                                 }\
  94                                         }\
  95                                 }
  96                                 FRAMEBLENDINSERT
  97                                 f = sub2;
  98                                 d = sublerp * lerp;
  99                         }
 100                         else
 101                         {
 102                                 f = scene->firstframe;
 103                                 d = lerp;
 104                         }
 105                         FRAMEBLENDINSERT
 106                 }
 107                 if (r->framelerp > 0 && r->frame2 >= 0)
 108                 {
 109                         scene = r->model->animscenes + r->frame2;
 110                         lerp = r->framelerp;
 111
 112                         if (scene->framecount > 1)
 113                         {
 114                                 sublerp = scene->framerate * (cl.time - r->frame1time);
 115                                 sub1 = (int) (sublerp);
 116                                 sub2 = sub1 + 1;
 117                                 sublerp -= sub1;
 118                                 if (!r_lerpmodels.integer)
 119                                         sublerp = 1;
 120                                 else if (sublerp >= (65535.0f / 65536.0f))
 121                                         sublerp = 1;
 122                                 else if (sublerp < (1.0f / 65536.0f))
 123                                         sublerp = 0;
 124                                 if (scene->loop)
 125                                 {
 126                                         sub1 = (sub1 % scene->framecount);
 127                                         sub2 = (sub2 % scene->framecount);
 128                                 }
 129                                 sub1 = bound(0, sub1, (scene->framecount - 1)) + scene->firstframe;
 130                                 sub2 = bound(0, sub2, (scene->framecount - 1)) + scene->firstframe;
 131                                 f = sub1;
 132                                 d = (1 - sublerp) * lerp;
 133                                 FRAMEBLENDINSERT
 134                                 f = sub2;
 135                                 d = sublerp * lerp;
 136                         }
 137                         else
 138                         {
 139                                 f = scene->firstframe;
 140                                 d = lerp;
 141                         }
 142                         FRAMEBLENDINSERT
 143                 }
 144         }
 145         else
 146         {
 147                 // if there are no scenes, assume it is all single-frame groups
 148                 if (r->framelerp < 1 && r->frame1 >= 0)
 149                 {
 150                         f = r->frame1;
 151                         d = 1 - r->framelerp;
 152                         FRAMEBLENDINSERT
 153                 }
 154                 if (r->framelerp > 0 && r->frame2 >= 0)
 155                 {
 156                         f = r->frame2;
 157                         d = r->framelerp;
 158                         FRAMEBLENDINSERT
 159                 }
 160         }
 161 }
 162