-#include "quakedef.h"
-
-// LordHavoc: quite tempting to break apart this function to reuse the
-// duplicated code, but I suspect it is better for performance
-// this way
-// LordHavoc: later note: made FRAMEBLENDINSERT macro
-void R_LerpAnimation(entity_render_t *r)
-{
- int sub1, sub2, numframes, f, i;
- double sublerp, lerp, d;
- animscene_t *scene;
- frameblend_t *blend;
-
- if (!r->model || !r->model->type)
- return;
-
- blend = r->frameblend;
-
- numframes = r->model->numframes;
-
- if (r->frame1 >= numframes)
- {
- Con_DPrintf ("CL_LerpAnimation: no such frame %d\n", r->frame1);
- r->frame1 = 0;
- }
-
- if (r->frame2 >= numframes)
- {
- Con_DPrintf ("CL_LerpAnimation: no such frame %d\n", r->frame2);
- r->frame2 = 0;
- }
-
- // note: this could be removed, if the rendering code allows an empty blend array
- if (r->frame1 < 0)
- Host_Error ("CL_LerpAnimation: frame1 is NULL\n");
-
- // check r_lerpmodels and round off very close blend percentages
- if (!r_lerpmodels.integer)
- r->framelerp = 1;
- else if (r->framelerp >= (65535.0f / 65536.0f))
- r->framelerp = 1;
- else if (r->framelerp < (1.0f / 65536.0f))
- r->framelerp = 0;
-
- blend[0].frame = blend[1].frame = blend[2].frame = blend[3].frame = 0;
- blend[0].lerp = blend[1].lerp = blend[2].lerp = blend[3].lerp = 0;
- if (r->model->animscenes)
- {
- if (r->framelerp < 1 && r->frame1 >= 0)
- {
- scene = r->model->animscenes + r->frame1;
- lerp = 1 - r->framelerp;
-
- if (scene->framecount > 1)
- {
- sublerp = scene->framerate * (cl.time - r->frame1time);
- sub1 = (int) (sublerp);
- sub2 = sub1 + 1;
- sublerp -= sub1;
- if (!r_lerpmodels.integer)
- sublerp = 1;
- else if (sublerp >= (65535.0f / 65536.0f))
- sublerp = 1;
- else if (sublerp < (1.0f / 65536.0f))
- sublerp = 0;
- if (scene->loop)
- {
- sub1 = (sub1 % scene->framecount);
- sub2 = (sub2 % scene->framecount);
- }
- else
- {
- sub1 = bound(0, sub1, (scene->framecount - 1));
- sub2 = bound(0, sub2, (scene->framecount - 1));
- }
- sub1 += scene->firstframe;
- sub2 += scene->firstframe;
- f = sub1;
- d = (1 - sublerp) * lerp;
-#define FRAMEBLENDINSERT\
- if (d > 0)\
- {\
- for (i = 0;i < 4;i++)\
- {\
- if (blend[i].frame == f)\
- {\
- blend[i].lerp += d;\
- break;\
- }\
- if (blend[i].lerp <= 0)\
- {\
- blend[i].frame = f;\
- blend[i].lerp = d;\
- break;\
- }\
- }\
- }
- FRAMEBLENDINSERT
- f = sub2;
- d = sublerp * lerp;
- }
- else
- {
- f = scene->firstframe;
- d = lerp;
- }
- FRAMEBLENDINSERT
- }
- if (r->framelerp > 0 && r->frame2 >= 0)
- {
- scene = r->model->animscenes + r->frame2;
- lerp = r->framelerp;
-
- if (scene->framecount > 1)
- {
- sublerp = scene->framerate * (cl.time - r->frame1time);
- sub1 = (int) (sublerp);
- sub2 = sub1 + 1;
- sublerp -= sub1;
- if (!r_lerpmodels.integer)
- sublerp = 1;
- else if (sublerp >= (65535.0f / 65536.0f))
- sublerp = 1;
- else if (sublerp < (1.0f / 65536.0f))
- sublerp = 0;
- if (scene->loop)
- {
- sub1 = (sub1 % scene->framecount);
- sub2 = (sub2 % scene->framecount);
- }
- else
- {
- sub1 = bound(0, sub1, (scene->framecount - 1));
- sub2 = bound(0, sub2, (scene->framecount - 1));
- }
- sub1 += scene->firstframe;
- sub2 += scene->firstframe;
- f = sub1;
- d = (1 - sublerp) * lerp;
- FRAMEBLENDINSERT
- f = sub2;
- d = sublerp * lerp;
- }
- else
- {
- f = scene->firstframe;
- d = lerp;
- }
- FRAMEBLENDINSERT
- }
- }
- else
- {
- // if there are no scenes, assume it is all single-frame groups
- if (r->framelerp < 1 && r->frame1 >= 0)
- {
- f = r->frame1;
- d = 1 - r->framelerp;
- FRAMEBLENDINSERT
- }
- if (r->framelerp > 0 && r->frame2 >= 0)
- {
- f = r->frame2;
- d = r->framelerp;
- FRAMEBLENDINSERT
- }
- }
-}
-