566 lines
21 KiB
C
566 lines
21 KiB
C
// spine json loader (wip)
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// - rlyeh, public domain
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//
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// [ref] http://es.esotericsoftware.com/spine-json-format
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//
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// notable misses:
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// - mesh deforms
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// - cubic beziers
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// - shears
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// - bounding boxes
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#include "v4k.h"
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#define spine spine2
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#define spine_render spine_render2
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#define spine_animate spine_animate2
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#define spine_skin spine_skin2
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#define ui_spine ui_spine2
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enum { _64 = 64 }; // max bones
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typedef struct spine_bone_t {
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char *name, *parent;
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struct spine_bone_t *parent_bone;
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float z; // draw order usually matches bone-id. ie, zindex == bone_id .. root(0) < chest (mid) < finger(top)
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float x, y, deg; // base
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float x2, y2, deg2; // accum / temporaries during bone transform time
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float x3, y3, deg3; // values from timeline
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unsigned rect_id;
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unsigned atlas_id;
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} spine_bone_t;
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typedef struct spine_slot_t {
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char *name, *bone, *attach;
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} spine_slot_t;
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typedef struct spine_rect_t {
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char *name;
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float x,y,w,h,sx,sy,deg;
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} spine_rect_t;
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typedef struct spine_skin_t {
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char *name;
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array(spine_rect_t) rects;
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} spine_skin_t;
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typedef struct spine_animkey_t { // offline; only during loading
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float time, curve[4]; // time is mandatory, curve is optional
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union {
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char *name; // type: attachment (mode-1)
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struct { float deg; }; // type: rotate (mode-2)
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struct { float x,y; }; // type: translate (mode-3)
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};
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} spine_animkey_t;
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#if 0
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typedef struct spine_pose_t { // runtime; only during playing
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unsigned frame;
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array(vec4) xform; // entry per bone. translation(x,y),rotation(z),attachment-id(w)
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} spine_pose_t;
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#endif
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typedef struct spine_anim_t {
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char *name;
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union {
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#if 0
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struct {
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unsigned frames;
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array(spine_pose_t) poses;
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};
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#endif
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struct {
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array(spine_animkey_t) attach_keys[_64];
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array(spine_animkey_t) rotate_keys[_64];
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array(spine_animkey_t) translate_keys[_64];
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};
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};
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} spine_anim_t;
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typedef struct spine_atlas_t {
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char *name;
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float x,y,w,h,deg;
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} spine_atlas_t;
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typedef struct spine_t {
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char *name;
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texture_t texture;
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unsigned skin;
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array(spine_bone_t) bones;
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array(spine_slot_t) slots;
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array(spine_skin_t) skins;
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array(spine_anim_t) anims;
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array(spine_atlas_t) atlas;
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// anim controller
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unsigned inuse;
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float time, maxtime;
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} spine_t;
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// ---
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void spine_convert_animkeys_to_animpose(spine_anim_t *input) {
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spine_anim_t copy = *input; // @todo
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// @leak: attach/rot/tra keys
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}
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int find_bone_id(spine_t *s, const char *bone_name) {
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for( unsigned i = 0, end = array_count(s->bones); i < end; ++i )
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if( !strcmp(s->bones[i].name, bone_name)) return i;
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return -1;
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}
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spine_bone_t *find_bone(spine_t *s, const char *bone_name) {
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int bone_id = find_bone_id(s, bone_name);
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return bone_id >= 0 ? &s->bones[bone_id] : NULL;
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}
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void spine_skin(spine_t *p, unsigned skin) {
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if( !p->texture.id ) return;
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if( skin >= array_count(p->skins) ) return;
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p->skin = skin;
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char *skin_name = va("%s/", p->skins[skin].name);
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int header = strlen(skin_name);
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for( int i = 0; i < array_count(p->atlas); ++i) {
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if(!strbeg(p->atlas[i].name, skin_name)) continue;
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int bone_id = find_bone_id(p, p->atlas[i].name+header );
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if( bone_id < 0 ) continue;
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p->bones[bone_id].atlas_id = i;
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}
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for( int i = 0; i < array_count(p->skins[p->skin].rects); ++i) {
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int bone_id = find_bone_id(p, p->skins[p->skin].rects[i].name );
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if( bone_id < 0 ) continue;
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p->bones[bone_id].rect_id = i;
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}
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}
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spine_t spine(const char *file_json, const char *file_atlas, unsigned flags) {
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spine_t z = {0}, t = z;
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char *atlas = vfs_read(file_atlas);
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if(!atlas || !atlas[0]) return z;
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// goblins.png
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// size: 1024, 128
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// filter: Linear, Linear
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// pma: true
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// dagger
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// bounds: 2, 18, 26, 108
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// goblin/eyes-closed
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// bounds: 2, 4, 34, 12
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spine_atlas_t *sa = 0;
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const char *last_id = 0;
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const char *texture_name = 0;
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const char *texture_filter = 0;
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const char *texture_format = 0;
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const char *texture_repeat = 0;
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float texture_width = 0, texture_height = 0, temp;
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for each_substring(atlas, "\r\n", it) {
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it += strspn(it, " \t\f\v");
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/**/ if( strbeg(it, "pma:" ) || strbeg(it, "index:") ) {} // ignored
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else if( strbeg(it, "size:" ) ) sscanf(it+5, "%f,%f", &texture_width, &texture_height);
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else if( strbeg(it, "rotate:" ) ) { float tmp; tmp=sa->w,sa->w=sa->h,sa->h=tmp; sa->deg = 90; } // assert(val==90)
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else if( strbeg(it, "repeat:" ) ) texture_repeat = it+7; // temp string
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else if( strbeg(it, "filter:" ) ) texture_filter = it+7; // temp string
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else if( strbeg(it, "format:" ) ) texture_format = it+7; // temp string
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else if( strbeg(it, "bounds:" ) ) {
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sscanf(it+7, "%f,%f,%f,%f", &sa->x, &sa->y, &sa->w, &sa->h);
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}
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else if( !texture_name ) texture_name = va("%s", it);
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else {
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array_push(t.atlas, ((spine_atlas_t){0}) );
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sa = &t.atlas[array_count(t.atlas) - 1];
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sa->name = STRDUP(it);
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}
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}
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for( int i = 0; i < array_count(t.atlas); ++i ) {
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sa = &t.atlas[i];
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sa->x /= texture_width, sa->y /= texture_height;
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sa->w /= texture_width, sa->h /= texture_height;
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}
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if(!texture_name) return z;
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t.texture = texture(texture_name, 0); // @todo: add texture flags here
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json_push(vfs_read(file_json)); // @fixme: json_push_from_file() ?
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array_resize(t.bones, json_count("/bones"));
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array_reserve(t.slots, json_count("/slots"));
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array_resize(t.skins, json_count("/skins"));
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array_resize(t.anims, json_count("/animations"));
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for( int i = 0, end = json_count("/bones"); i < end; ++i ) {
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spine_bone_t v = {0};
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v.name = STRDUP(json_string("/bones[%d]/name", i));
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v.parent = STRDUP(json_string("/bones[%d]/parent", i));
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v.x = json_float("/bones[%d]/x", i);
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v.y = json_float("/bones[%d]/y", i);
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v.z = i;
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v.deg = json_float("/bones[%d]/rotation", i);
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t.bones[i] = v;
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for( int j = i-1; j > 0; --j ) {
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if( strcmp(t.bones[j].name,v.parent) ) continue;
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t.bones[i].parent_bone = &t.bones[j];
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break;
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}
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}
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for( int i = 0, end = json_count("/slots"); i < end; ++i ) {
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spine_slot_t v = {0};
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v.name = STRDUP(json_string("/slots[%d]/name", i));
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v.bone = STRDUP(json_string("/slots[%d]/bone", i));
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v.attach = STRDUP(json_string("/slots[%d]/attachment", i));
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array_push(t.slots, v);
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// slots define draw-order. so, update draw-order/zindex in bone
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spine_bone_t *b = find_bone(&t, v.name);
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if( b ) b->z = i;
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}
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for( int i = 0, end = json_count("/skins"); i < end; ++i ) {
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spine_skin_t v = {0};
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v.name = STRDUP(json_string("/skins[%d]/name", i));
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for( int j = 0, jend = json_count("/skins[%d]/attachments",i); j < jend; ++j ) // /skins/default/
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for( int k = 0, kend = json_count("/skins[%d]/attachments[%d]",i,j); k < kend; ++k ) { // /skins/default/left hand item/
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spine_rect_t r = {0};
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r.name = STRDUP(json_key("/skins[%d]/attachments[%d][%d]",i,j,k)); // stringf("%s-%s-%s", json_key("/skins[%d]",i), json_key("/skins[%d][%d]",i,j), json_key("/skins[%d][%d][%d]",i,j,k));
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r.x = json_float("/skins[%d]/attachments[%d][%d]/x",i,j,k);
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r.y = json_float("/skins[%d]/attachments[%d][%d]/y",i,j,k);
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r.sx= json_float("/skins[%d]/attachments[%d][%d]/scaleX",i,j,k); r.sx += !r.sx;
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r.sy= json_float("/skins[%d]/attachments[%d][%d]/scaleY",i,j,k); r.sy += !r.sy;
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r.w = json_float("/skins[%d]/attachments[%d][%d]/width",i,j,k);
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r.h = json_float("/skins[%d]/attachments[%d][%d]/height",i,j,k);
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r.deg = json_float("/skins[%d]/attachments[%d][%d]/rotation",i,j,k);
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array_push(v.rects, r);
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}
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t.skins[i] = v;
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}
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#if 1
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// simplify:
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// merge /skins/default into existing /skins/*, then delete /skins/default
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if( array_count(t.skins) > 1 ) {
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for( int i = 1; i < array_count(t.skins); ++i ) {
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for( int j = 0; j < array_count(t.skins[0].rects); ++j ) {
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array_push(t.skins[i].rects, t.skins[0].rects[j]);
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}
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}
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// @leak @fixme: free(t.skins[0])
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for( int i = 0; i < array_count(t.skins)-1; ++i ) {
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t.skins[i] = t.skins[i+1];
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}
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array_pop(t.skins);
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}
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#endif
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for( int i = 0, end = json_count("/animations"); i < end; ++i ) {
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int id;
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const char *name;
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spine_anim_t v = {0};
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v.name = STRDUP(json_key("/animations[%d]", i));
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// slots / attachments
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for( int j = 0, jend = json_count("/animations[%d]/slots",i); j < jend; ++j )
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for( int k = 0, kend = json_count("/animations[%d]/slots[%d]",i,j); k < kend; ++k ) // ids
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{
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int bone_id = find_bone_id(&t, json_key("/animations[%d]/bones[%d]",i,j));
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if( bone_id < 0 ) continue;
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for( int l = 0, lend = json_count("/animations[%d]/slots[%d][%d]",i,j,k); l < lend; ++l ) { // channels (rot,tra,attach)
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spine_animkey_t key = {0};
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key.name = STRDUP(json_string("/animations[%d]/slots[%d][%d][%d]/name",i,j,k,l));
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key.time = json_float("/animations[%d]/slots[%d][%d][%d]/time",i,j,k,l);
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if( json_count("/animations[%d]/slots[%d][%d][%d]/curve",i,j,k,l) == 4 ) {
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key.curve[0] = json_float("/animations[%d]/slots[%d][%d][%d]/curve[0]",i,j,k,l);
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key.curve[1] = json_float("/animations[%d]/slots[%d][%d][%d]/curve[1]",i,j,k,l);
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key.curve[2] = json_float("/animations[%d]/slots[%d][%d][%d]/curve[2]",i,j,k,l);
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key.curve[3] = json_float("/animations[%d]/slots[%d][%d][%d]/curve[3]",i,j,k,l);
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}
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// @todo: convert name to id
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// for(id = 0; t.bones[id].name && strcmp(t.bones[id].name,key.name); ++id)
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// printf("%s vs %s\n", key.name, t.bones[id].name);
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array_push(v.attach_keys[bone_id], key);
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}
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}
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// bones
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for( int j = 0, jend = json_count("/animations[%d]/bones",i); j < jend; ++j ) // slots or bones
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for( int k = 0, kend = json_count("/animations[%d]/bones[%d]",i,j); k < kend; ++k ) { // bone ids
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int bone_id = find_bone_id(&t, json_key("/animations[%d]/bones[%d]",i,j));
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if( bone_id < 0 ) continue;
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// parse bones
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for( int l = 0, lend = json_count("/animations[%d]/bones[%d][%d]",i,j,k); l < lend; ++l ) { // channels (rot,tra,attach)
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const char *channel = json_key("/animations[%d]/bones[%d][%d]",i,j,k);
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int track = !strcmp(channel, "rotate") ? 1 : !strcmp(channel, "translate") ? 2 : 0;
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if( !track ) continue;
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spine_animkey_t key = {0};
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key.time = json_float("/animations[%d]/bones[%d][%d][%d]/time",i,j,k,l);
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if( json_count("/animations[%d]/bones[%d][%d][%d]/curve",i,j,k,l) == 4 ) {
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key.curve[0] = json_float("/animations[%d]/bones[%d][%d][%d]/curve[0]",i,j,k,l);
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key.curve[1] = json_float("/animations[%d]/bones[%d][%d][%d]/curve[1]",i,j,k,l);
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key.curve[2] = json_float("/animations[%d]/bones[%d][%d][%d]/curve[2]",i,j,k,l);
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key.curve[3] = json_float("/animations[%d]/bones[%d][%d][%d]/curve[3]",i,j,k,l);
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}
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if( track == 1 )
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key.deg = json_float("/animations[%d]/bones[%d][%d][%d]/value",i,j,k,l), // "/angle"
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array_push(v.rotate_keys[bone_id], key);
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else
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key.x = json_float("/animations[%d]/bones[%d][%d][%d]/x",i,j,k,l),
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key.y = json_float("/animations[%d]/bones[%d][%d][%d]/y",i,j,k,l),
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array_push(v.translate_keys[bone_id], key);
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}
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}
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t.anims[i] = v;
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}
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json_pop();
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spine_skin(&t, 0);
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return t;
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}
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void spine_render(spine_t *p, vec3 offset, unsigned flags) {
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if( !p->texture.id ) return;
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if( !flags ) return;
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ddraw_push_2d();
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if( flags & 2 ) ddraw_line(vec3(0,0,0), vec3(window_width(),window_height(),0));
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if( flags & 2 ) ddraw_line(vec3(window_width(),0,0), vec3(0,window_height(),0));
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for( int i = 1; i < array_count(p->bones); ++i ) {
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spine_bone_t *self = &p->bones[i];
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static array(spine_bone_t*) chain = 0; array_resize(chain, 0);
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for( spine_bone_t *next = self; next ; next = next->parent_bone ) {
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array_push(chain, next);
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}
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vec3 target = {0}, prev = {0};
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for( int j = 1, end = array_count(chain); j < end; ++j ) { // traverse from root(skipped) -> `i` bone direction
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int j_opposite = (end - 1) - j;
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spine_bone_t *b = chain[j_opposite]; // bone
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spine_bone_t *pb = chain[j_opposite+1]; // parent bone
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prev = target;
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const float deg2rad = C_PI / 180;
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b->x2 = b->x3 + pb->x2 + b->x * cos( -pb->deg2 * deg2rad ) - b->y * sin( -pb->deg2 * deg2rad );
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b->y2 = -b->y3 + pb->y2 - b->y * cos( pb->deg2 * deg2rad ) + b->x * sin( pb->deg2 * deg2rad );
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b->deg2 = -b->deg3 + pb->deg2 - b->deg;
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target = vec3(b->x2,b->y2,b->deg2);
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}
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float deg = target.z, deg_prev = prev.z;
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target.z = 0; prev.z = 0;
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target = add3(target, offset);
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prev = add3(prev, offset);
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if( flags & 2 ) {
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ddraw_point( target );
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ddraw_text( target, -0.25f, self->name );
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ddraw_line( target, prev ); // from bone to parent
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}
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if( flags & 1 ) {
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vec4 rect = ptr4(&p->atlas[self->atlas_id].x);
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float zindex = self->z;
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float offsx = 0; // -(rect.w * p->texture.w); // -p->atlas[self->atlas_id].w - (self->rect_id ? p->skins[p->skin].rects[self->rect_id].w/2 : 0);
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float offsy = 0; // /*-(rect.z * p->texture.h)*2*/ -p->atlas[self->atlas_id].h - (self->rect_id ? p->skins[p->skin].rects[self->rect_id].h/2 : 0);
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float deg_rect = self->rect_id ? p->skins[p->skin].rects[self->rect_id].deg : 0;
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float tilt = p->atlas[self->atlas_id].deg + self->deg2 - deg_rect; // + self->deg2 + deg_rect + p->atlas[self->atlas_id].deg
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unsigned tint = ~0u, flags = 0;
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sprite_rect(p->texture, rect, vec4(target.x,target.y,0,zindex), vec4(1,1,offsx,offsy), tilt, tint, flags);
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}
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}
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ddraw_pop_2d();
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ddraw_flush();
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}
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void spine_animate(spine_t *p, float *time, float *maxtime, float delta) {
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if( !p->texture.id ) return;
|
|
|
|
if( delta > 1/120.f ) delta = 1/120.f;
|
|
if( *time >= *maxtime ) *time = 0; else *time += delta;
|
|
|
|
// reset root // needed?
|
|
p->bones[0].x2 = 0;
|
|
p->bones[0].y2 = 0;
|
|
p->bones[0].deg2 = 0;
|
|
p->bones[0].x3 = 0;
|
|
p->bones[0].y3 = 0;
|
|
p->bones[0].deg3 = 0;
|
|
|
|
for( int i = 0, end = array_count(p->bones); i < end; ++i) {
|
|
// @todo: attach channel
|
|
// @todo: per channel: if curve == linear || curve == stepped || array_count(curve) == 4 {...}
|
|
for each_array_ptr(p->anims[p->inuse].rotate_keys[i], spine_animkey_t, r) {
|
|
double r0 = r->time;
|
|
*maxtime = maxf( *maxtime, r0 );
|
|
if( absf(*time - r0) < delta ) {
|
|
p->bones[i].deg3 = r->deg;
|
|
}
|
|
}
|
|
for each_array_ptr(p->anims[p->inuse].translate_keys[i], spine_animkey_t, r) {
|
|
double r0 = r->time;
|
|
*maxtime = maxf( *maxtime, r0 );
|
|
if( absf(*time - r0) < delta ) {
|
|
p->bones[i].x3 = r->x;
|
|
p->bones[i].y3 = r->y;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void ui_spine(spine_t *p) {
|
|
|
|
if( ui_collapse(va("Anims: %d", array_count(p->anims)), va("%p-a", p))) {
|
|
for each_array_ptr(p->anims, spine_anim_t, q) {
|
|
if(ui_slider2("", &p->time, va("%.2f/%.0f %.2f%%", p->time, p->maxtime, p->time * 100.f))) {
|
|
spine_animate(p, &p->time, &p->maxtime, 0);
|
|
}
|
|
|
|
int choice = ui_label2_toolbar(q->name, ICON_MD_PAUSE_CIRCLE " " ICON_MD_PLAY_CIRCLE);
|
|
if( choice == 1 ) window_pause( 0 ); // play
|
|
if( choice == 2 ) window_pause( 1 ); // pause
|
|
|
|
for( int i = 0; i < _64; ++i ) {
|
|
ui_separator();
|
|
ui_label(va("Bone %d: Attachment keys", i));
|
|
for each_array_ptr(q->attach_keys[i], spine_animkey_t, r) {
|
|
ui_label(va("%.2f [%.2f %.2f %.2f %.2f] %s", r->time, r->curve[0], r->curve[1], r->curve[2], r->curve[3], r->name));
|
|
}
|
|
ui_label(va("Bone %d: Rotate keys", i));
|
|
for each_array_ptr(q->rotate_keys[i], spine_animkey_t, r) {
|
|
ui_label(va("%.2f [%.2f %.2f %.2f %.2f] %.2f deg", r->time, r->curve[0], r->curve[1], r->curve[2], r->curve[3], r->deg));
|
|
}
|
|
ui_label(va("Bone %d: Translate keys", i));
|
|
for each_array_ptr(q->translate_keys[i], spine_animkey_t, r) {
|
|
ui_label(va("%.2f [%.2f %.2f %.2f %.2f] (%.2f,%.2f)", r->time, r->curve[0], r->curve[1], r->curve[2], r->curve[3], r->x, r->y));
|
|
}
|
|
}
|
|
}
|
|
ui_collapse_end();
|
|
}
|
|
if( ui_collapse(va("Bones: %d", array_count(p->bones)), va("%p-b", p))) {
|
|
for each_array_ptr(p->bones, spine_bone_t, q)
|
|
if( ui_collapse(q->name, va("%p-b2", q)) ) {
|
|
ui_label2("Parent:", q->parent);
|
|
ui_label2("X:", va("%.2f", q->x));
|
|
ui_label2("Y:", va("%.2f", q->y));
|
|
ui_label2("Rotation:", va("%.2f", q->deg));
|
|
ui_collapse_end();
|
|
}
|
|
ui_collapse_end();
|
|
}
|
|
if( ui_collapse(va("Slots: %d", array_count(p->slots)), va("%p-s", p))) {
|
|
for each_array_ptr(p->slots, spine_slot_t, q)
|
|
if( ui_collapse(q->name, va("%p-s2", q)) ) {
|
|
ui_label2("Bone:", q->bone);
|
|
ui_label2("Attachment:", q->attach);
|
|
ui_collapse_end();
|
|
}
|
|
ui_collapse_end();
|
|
}
|
|
if( ui_collapse(va("Skins: %d", array_count(p->skins)), va("%p-k", p))) {
|
|
for each_array_ptr(p->skins, spine_skin_t, q)
|
|
if( ui_collapse(q->name, va("%p-k2", q)) ) {
|
|
for each_array_ptr(q->rects, spine_rect_t, r)
|
|
if( ui_collapse(r->name, va("%p-k3", r)) ) {
|
|
ui_label2("X:", va("%.2f", r->x));
|
|
ui_label2("Y:", va("%.2f", r->y));
|
|
ui_label2("Scale X:", va("%.2f", r->sx));
|
|
ui_label2("Scale Y:", va("%.2f", r->sy));
|
|
ui_label2("Width:", va("%.2f", r->w));
|
|
ui_label2("Height:", va("%.2f", r->h));
|
|
ui_label2("Rotation:", va("%.2f", r->deg));
|
|
ui_collapse_end();
|
|
|
|
|
|
spine_bone_t *b = find_bone(p, r->name);
|
|
if( b ) {
|
|
static float tilt = 0;
|
|
if( input(KEY_LCTRL) ) tilt += 60*1/60.f; else tilt = 0;
|
|
spine_atlas_t *r = p->atlas + b->atlas_id;
|
|
sprite_flush();
|
|
camera_get_active()->position = vec3(0,0,2);
|
|
vec4 rect = ptr4(&r->x); float zindex = 0; vec4 scale_offset = vec4(1,1,0,0);
|
|
sprite_rect(p->texture, ptr4(&r->x), vec4(0,0,0,zindex), scale_offset, r->deg + tilt, ~0u, 0);
|
|
sprite_flush();
|
|
camera_get_active()->position = vec3(+window_width()/3,window_height()/2.25,2);
|
|
}
|
|
}
|
|
ui_collapse_end();
|
|
}
|
|
ui_collapse_end();
|
|
}
|
|
|
|
if( ui_int("Use skin", &p->skin) ) {
|
|
p->skin = clampf(p->skin, 0, array_count(p->skins) - 1);
|
|
spine_skin(p, p->skin);
|
|
}
|
|
|
|
if( p->texture.id ) ui_texture(0, p->texture);
|
|
}
|
|
|
|
|
|
|
|
int main() {
|
|
window_create(0.75, 0);
|
|
|
|
camera_t cam = camera();
|
|
cam.position = vec3(0,0,1);
|
|
camera_enable(&cam);
|
|
|
|
spine_t s = spine("goblins.json", "goblins.atlas", 0);
|
|
|
|
while( window_swap() ) {
|
|
camera_get_active()->position.x = window_width()/2;
|
|
camera_get_active()->position.y = window_height()/2;
|
|
|
|
static bool do_skin = 1, do_skel = 1;
|
|
spine_animate(&s, &s.time, &s.maxtime, !window_has_pause() * window_delta());
|
|
|
|
spine_render(&s, vec3(window_width()/2, window_height()/2, 0), do_skin );
|
|
sprite_flush();
|
|
glClear(GL_DEPTH_BUFFER_BIT);
|
|
spine_render(&s, vec3(window_width()/2, window_height()/2, 0), (do_skel*2));
|
|
|
|
if( ui_panel("Spine", 0) ) {
|
|
if(ui_button("Load")) {
|
|
s = spine("goblins.json", "goblins.atlas", 0);
|
|
}
|
|
ui_spine(&s);
|
|
if(ui_bool("Draw Skin", &do_skin));
|
|
if(ui_bool("Draw Skeleton", &do_skel));
|
|
ui_panel_end();
|
|
}
|
|
}
|
|
}
|