Animation trees
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cc37e17046
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295c882100
169
src/k3.c
169
src/k3.c
@ -294,12 +294,12 @@ struct k3Mesh *k3MdlGetMeshes(struct k3Mdl *mdl, size_t *count) {
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return mdl->meshes;
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}
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void k3MdlAddAnim(struct k3Mdl *mdl, struct k3Animation *anim) {
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void k3MdlAddAnim(struct k3Mdl *mdl, struct k3AnimationFountain *anim) {
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mdl->anims = realloc(mdl->anims, sizeof(*mdl->anims) * (mdl->animCount + 1));
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mdl->anims[mdl->animCount++] = anim;
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}
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struct k3Animation *k3MdlGetAnim(struct k3Mdl *mdl, uint16_t id) {
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struct k3AnimationFountain *k3MdlGetAnim(struct k3Mdl *mdl, uint16_t id) {
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for(size_t i = 0; i < mdl->animCount; i++) {
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if(mdl->anims[i]->id == id) {
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return mdl->anims[i];
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@ -311,6 +311,16 @@ size_t k3MdlGetBoneCount(struct k3Mdl *mdl) {
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return mdl->boneCount;
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}
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static size_t bonenames_len(size_t boneCount, const char *names) {
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const char *bn = names;
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size_t sz = 0;
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for(int b = 0; b < boneCount; b++) {
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sz += strlen(bn) + 1;
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bn += strlen(bn) + 1;
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}
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return sz;
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}
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struct k3Mdl *k3MdlCopySubs(struct k3Mdl *src) {
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struct k3Mdl *dst = calloc(1, sizeof(*dst));
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@ -331,9 +341,14 @@ struct k3Mdl *k3MdlCopySubs(struct k3Mdl *src) {
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dst->boneCount = src->boneCount;
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dst->invBind = malloc(sizeof(*dst->invBind) * dst->boneCount);
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memcpy(dst->invBind, src->invBind, sizeof(dst->invBind) * dst->boneCount);
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memcpy(dst->invBind, src->invBind, sizeof(*dst->invBind) * dst->boneCount);
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dst->boneParents = malloc(sizeof(*dst->boneParents) * dst->boneCount);
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memcpy(dst->boneParents, src->boneParents, sizeof(*dst->boneParents) * dst->boneCount);
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if(src->boneNames) {
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size_t sz = bonenames_len(src->boneCount, src->boneNames);
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dst->boneNames = calloc(1, sz);
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memcpy(dst->boneNames, src->boneNames, sz);
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}
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dst->animCount = src->animCount;
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dst->anims = malloc(sizeof(*dst->anims) * dst->animCount);
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@ -360,65 +375,113 @@ void k3MdlSetDebugName(struct k3Mdl *mdl, const char *name) {
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k3Log(k3_DEBUG, "Model name: %s", name);
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}
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static void anim_update(struct k3Animator *anim) {
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float frame = anim->time * anim->base->fps;
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size_t f0 = floorf(frame);
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size_t f1 = (f0 + 1);
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float alpha = frame - f0;
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f0 %= anim->base->frameCount;
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f1 %= anim->base->frameCount;
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for(size_t b = 0; b < anim->base->boneCount; b++) {
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vec4 t0, t1;
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glm_vec4_copy(anim->base->frames[anim->base->boneCount * f0 + b].translation, t0);
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glm_vec4_copy(anim->base->frames[anim->base->boneCount * f1 + b].translation, t1);
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versor r0, r1;
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glm_quat_copy(anim->base->frames[anim->base->boneCount * f0 + b].rotation, r0);
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glm_quat_copy(anim->base->frames[anim->base->boneCount * f1 + b].rotation, r1);
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vec4 t;
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glm_vec4_lerp(t0, t1, alpha, t);
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versor r;
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glm_quat_slerp(r0, r1, alpha, r);
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mat4 m = GLM_MAT4_IDENTITY_INIT;
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glm_quat_mat4(r, m);
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glm_vec4_copy(t, m[3]);
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uint8_t parent = anim->base->boneParents[b];
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if(parent != 0xFF) {
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glm_mat4_mul(anim->inter[parent], m, anim->inter[b]);
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} else {
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glm_mat4_copy(m, anim->inter[b]);
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static void qwfun(struct k3Mdl *mdl, size_t b, float *output) {
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for(size_t c = b + 1; c < mdl->boneCount; c++) {
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if(mdl->boneParents[c] == b) {
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output[c] = 1;
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qwfun(mdl, c, output);
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}
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}
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for(size_t b = 0; b < anim->base->boneCount; b++) {
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glm_mat4_mul(anim->inter[b], anim->base->invBind[b], anim->inter[b]);
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}
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}
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void k3AnimatorSet(struct k3Animator *anim, float time) {
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if(!anim->inter) anim->inter = _mm_malloc(sizeof(mat4) * anim->base->boneCount * anim->base->frameCount, 16);
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void k3MdlQueryWeights(struct k3Mdl *mdl, size_t boneIdx, float *output) {
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memset(output, 0, sizeof(*output) * mdl->boneCount);
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if(!anim->loop) {
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time = fmaxf(time, 0);
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time = fminf(time, (float) (anim->base->frameCount - 1) / anim->base->fps);
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if(boneIdx < mdl->boneCount) {
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qwfun(mdl, boneIdx, output);
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}
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}
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intmax_t k3MdlGetBoneFromName(struct k3Mdl *mdl, const char *targetName) {
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if(!mdl->boneNames) {
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return -1;
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}
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anim->time = time;
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const char *name = mdl->boneNames;
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anim_update(anim);
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for(size_t b = 0; b < mdl->boneCount; b++) {
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if(!strcmp(name, targetName)) {
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return b;
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}
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name = name + strlen(name) + 1;
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}
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return -1;
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}
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void k3MdlSetBoneNames(struct k3Mdl *mdl, const char *names) {
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size_t sz = bonenames_len(mdl->boneCount, names);
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mdl->boneNames = malloc(sz);
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memcpy(mdl->boneNames, names, sz);
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}
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void k3AnimatorInit(struct k3Animator *this, struct k3Mdl *mdl) {
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this->mdl = mdl;
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size_t boneCount = k3MdlGetBoneCount(this->mdl);
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this->bones = _mm_malloc(boneCount * sizeof(*this->bones), 16);
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for(size_t b = 0; b < boneCount; b++) {
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this->bones[b].translation[0] = 0;
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this->bones[b].translation[1] = 0;
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this->bones[b].translation[2] = 0;
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this->bones[b].translation[3] = 1;
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this->bones[b].rotation[0] = 0;
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this->bones[b].rotation[1] = 0;
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this->bones[b].rotation[2] = 0;
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this->bones[b].rotation[3] = 1;
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}
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}
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void k3AnimatorSet(struct k3Animator *anim, float time) {
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anim->time = time;
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k3AnimationUpdate(anim->anim, anim->time);
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if(!anim->bones) {
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anim->bones = _mm_malloc(sizeof(*anim->bones) * anim->anim->bones, 16);
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memset(anim->bones, 0, sizeof(*anim->bones) * anim->anim->bones);
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}
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if(!anim->anim->cache) {
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return;
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}
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mat4 *mats = alloca(sizeof(*mats) * anim->anim->bones);
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memset(mats, 0, sizeof(*mats) * anim->anim->bones);
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for(size_t b = 0; b < anim->anim->bones; b++) {
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mat4 m = GLM_MAT4_IDENTITY_INIT;
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glm_quat_mat4(anim->anim->cache[b].rotation, m);
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glm_vec4_copy(anim->anim->cache[b].translation, m[3]);
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uint8_t parent = anim->mdl->boneParents[b];
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if(parent != 0xFF) {
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glm_mat4_mul(mats[parent], m, mats[b]);
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} else {
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glm_mat4_copy(m, mats[b]);
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}
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}
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for(size_t b = 0; b < anim->anim->bones; b++) {
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glm_mat4_mul(mats[b], anim->mdl->invBind[b], mats[b]);
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}
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for(size_t b = 0; b < anim->anim->bones; b++) {
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vec4 t;
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mat4 r;
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vec3 s;
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glm_decompose(mats[b], t, r, s);
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t[3] = 1;
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glm_vec4_copy(t, anim->bones[b].translation);
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versor q;
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glm_mat4_quat(r, q);
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glm_quat_copy(q, anim->bones[b].rotation);
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}
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}
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void k3AnimatorStep(struct k3Animator *anim, float dt) {
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k3AnimatorSet(anim, anim->time + dt);
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}
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struct k3Tex *k3TexCreate(enum k3TexType type) {
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struct k3Tex *ret = calloc(1, sizeof(*ret));
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@ -1499,7 +1562,7 @@ static void forward_subpass(mat4 projection, mat4 view, int transparent, int lig
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enable_glsl_tangents(glsl, mdl);
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}
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if(k3IsSoftSkinning) {
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if(k3IsSoftSkinning && bones) {
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apply_cpu_skinning(mdl, bones);
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}
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@ -1694,7 +1757,7 @@ void k3PassDepthOnly(mat4 projection, mat4 cam, int clear, int cull) {
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enable_glsl_bones(glsl, mdl, bones);
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}
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if(k3IsSoftSkinning) {
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if(k3IsSoftSkinning && bones) {
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apply_cpu_skinning(mdl, bones);
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}
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@ -1940,7 +2003,7 @@ static void pass_irregular(int passnum, mat4 mainproj, mat4 maincam, mat4 lightp
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enable_glsl_bones(glsl, mdl, bones);
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}
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if(k3IsSoftSkinning) {
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if(k3IsSoftSkinning && bones) {
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apply_cpu_skinning(mdl, bones);
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}
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39
src/k3.h
39
src/k3.h
@ -5,6 +5,7 @@
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#include<cglm/vec3.h>
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#include<cglm/mat4.h>
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#include<cglm/quat.h>
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#include"k3anim.h"
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#ifdef k3_MULTITHREAD
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#include<pthread.h>
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@ -101,27 +102,17 @@ struct k3Mat {
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} passes[1];
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};
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struct k3AnimationBone {
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vec4 translation;
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versor rotation;
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};
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struct k3Animation {
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struct k3AnimationBone *frames;
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mat4 *invBind;
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uint8_t *boneParents;
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uint16_t fps;
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uint16_t frameCount;
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uint16_t boneCount;
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uint16_t id;
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};
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struct k3Animator {
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float time;
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int loop;
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struct k3Mdl *mdl;
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mat4 *inter;
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struct k3AnimationBone *bones;
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struct k3Animation *base;
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struct k3Animation *anim;
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double time;
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bool playing;
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double playStartTime;
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};
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struct k3Offscreen;
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@ -170,14 +161,16 @@ struct k3Mdl *k3MdlCreate(size_t verts, size_t indices, size_t boneCount, vec3 *
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void k3MdlUpdatePos(struct k3Mdl *mdl, vec3 *pos);
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void k3MdlAddMesh(struct k3Mdl*, struct k3Mat*, uint16_t idxStart, uint16_t idxNumber);
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struct k3Mesh *k3MdlGetMeshes(struct k3Mdl*, size_t *count);
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void k3MdlAddAnim(struct k3Mdl*, struct k3Animation*);
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struct k3Animation *k3MdlGetAnim(struct k3Mdl*, uint16_t id);
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void k3MdlAddAnim(struct k3Mdl*, struct k3AnimationFountain*);
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struct k3AnimationFountain *k3MdlGetAnim(struct k3Mdl*, uint16_t id);
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size_t k3MdlGetBoneCount(struct k3Mdl*);
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void k3MdlSetDebugName(struct k3Mdl*, const char*);
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struct k3Mdl *k3MdlCopySubs(struct k3Mdl*);
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void k3MdlSetDebugName(struct k3Mdl*, const char*);
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void k3MdlQueryWeights(struct k3Mdl*, size_t bone, float *output);
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intmax_t k3MdlGetBoneFromName(struct k3Mdl*, const char*);
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void k3MdlSetBoneNames(struct k3Mdl*, const char*);
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void k3AnimatorInit(struct k3Animator*, struct k3Mdl*);
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void k3AnimatorSet(struct k3Animator*, float);
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void k3AnimatorStep(struct k3Animator*, float);
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@ -71,9 +71,10 @@ struct k3Mdl {
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size_t boneCount;
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mat4 *invBind;
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uint8_t *boneParents;
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char *boneNames;
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uint16_t animCount;
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struct k3Animation **anims;
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struct k3AnimationFountain **anims;
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vec3 aabb[2];
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185
src/k3anim.c
Normal file
185
src/k3anim.c
Normal file
@ -0,0 +1,185 @@
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#include"k3anim.h"
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#include<cglm/mat4.h>
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#include<cglm/quat.h>
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#include<stdint.h>
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#include<stddef.h>
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static uint32_t lcg() {
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static uint32_t asdf = 0;
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asdf = asdf * 1664525 + 1013904223;
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return asdf;
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}
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static void power_iter(mat4 M, int iterations, float eps, vec4 ev) {
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// Random starting vector
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uint32_t rng = lcg();
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ev[0] = (rng & 0xFF) / 255.f;
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rng >>= 8;
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ev[1] = (rng & 0xFF) / 255.f;
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rng >>= 8;
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ev[2] = (rng & 0xFF) / 255.f;
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rng >>= 8;
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ev[3] = rng / 255.f;
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for(int i = 0; i < iterations; i++) {
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vec4 k;
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glm_mat4_mulv(M, ev, k);
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glm_vec4_normalize_to(k, ev);
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}
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}
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static void quat_to_mat(versor v, mat4 m) {
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for(int y = 0; y < 4; y++) {
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for(int x = 0; x < 4; x++) {
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m[y][x] = v[y] * v[x];
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}
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}
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}
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bool k3AnimationUpdate(struct k3Animation *anim, float time) {
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if(anim->op == k3_ANIM_BASIC) {
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struct k3AnimationBasic *basic = (void*) anim;
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struct k3AnimationFountain *fountain = basic->fountain;
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if(!anim->cache) {
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anim->bones = fountain->bones;
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anim->cache = _mm_malloc(sizeof(*anim->cache) * anim->bones, 16);
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}
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float frame = time * fountain->fps;
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if(!basic->loop) {
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frame = fminf(frame, fountain->frameCount - 1);
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}
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size_t f0 = floorf(frame);
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size_t f1 = (f0 + 1);
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float alpha = frame - f0;
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f0 %= fountain->frameCount;
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f1 %= fountain->frameCount;
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for(size_t b = 0; b < fountain->bones; b++) {
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vec4 t0, t1;
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glm_vec4_copy(fountain->frames[fountain->bones * f0 + b].translation, t0);
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glm_vec4_copy(fountain->frames[fountain->bones * f1 + b].translation, t1);
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versor r0, r1;
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glm_quat_copy(fountain->frames[fountain->bones * f0 + b].rotation, r0);
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glm_quat_copy(fountain->frames[fountain->bones * f1 + b].rotation, r1);
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glm_vec4_lerp(t0, t1, alpha, basic->cache[b].translation);
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glm_quat_slerp(r0, r1, alpha, basic->cache[b].rotation);
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}
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return true;
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} else if(anim->op == k3_ANIM_BLEND) {
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struct k3AnimationBlend *blend = (void*) anim;
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if(blend->children == 0) return false;
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if(!blend->cache || blend->bones != blend->subs[0]->bones) {
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if(blend->cache) _mm_free(blend->cache);
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blend->bones = blend->subs[0]->bones;
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blend->cache = _mm_malloc(blend->bones * sizeof(*blend->cache), 16);
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}
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for(size_t c = 0; c < blend->children; c++) {
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if(!k3AnimationUpdate(blend->subs[c], blend->offsets[c] + time * blend->speeds[c])) return false;
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if(blend->subs[c]->bones != blend->bones) return false;
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}
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for(size_t b = 0; b < blend->bones; b++) {
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float weightSum = 0;
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vec4 translationSum = GLM_VEC4_ZERO_INIT;
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mat4 rotationSum = GLM_MAT4_ZERO_INIT;
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for(size_t c = 0; c < blend->children; c++) {
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float w = blend->weights[c * blend->bones + b];
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weightSum += w;
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glm_vec4_muladds(blend->subs[c]->cache[b].translation, w, translationSum);
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mat4 rm;
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quat_to_mat(blend->subs[c]->cache[b].rotation, rm);
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glm_mat4_scale(rm, w);
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glm_vec4_add(rotationSum[0], rm[0], rotationSum[0]);
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glm_vec4_add(rotationSum[1], rm[1], rotationSum[1]);
|
||||
glm_vec4_add(rotationSum[2], rm[2], rotationSum[2]);
|
||||
glm_vec4_add(rotationSum[3], rm[3], rotationSum[3]);
|
||||
}
|
||||
|
||||
glm_vec4_scale(translationSum, 1.0f / weightSum, blend->cache[b].translation);
|
||||
|
||||
vec4 dominantEigenVector;
|
||||
power_iter(rotationSum, 64, 1e-5f, dominantEigenVector);
|
||||
glm_vec4_normalize(dominantEigenVector);
|
||||
glm_quat_copy((float*) dominantEigenVector, blend->cache[b].rotation);
|
||||
}
|
||||
|
||||
return true;
|
||||
} else if(anim->op == k3_ANIM_ADD) {
|
||||
struct k3AnimationAdd *add = (void*) anim;
|
||||
|
||||
if(!k3AnimationUpdate(add->sub1, time)) return false;
|
||||
if(!k3AnimationUpdate(add->sub2, time)) return false;
|
||||
|
||||
if(!add->cache || add->bones != add->sub1->bones) {
|
||||
if(add->cache) _mm_free(add->cache);
|
||||
|
||||
add->bones = add->sub1->bones;
|
||||
add->cache = _mm_malloc(add->bones * sizeof(*add->cache), 16);
|
||||
}
|
||||
|
||||
versor norot = {0, 0, 0, 1};
|
||||
|
||||
for(size_t b = 0; b < add->bones; b++) {
|
||||
glm_vec4_copy(add->sub1->cache[b].translation, add->cache[b].translation);
|
||||
glm_vec4_muladds(add->sub2->cache[b].translation, add->scale, add->cache[b].translation);
|
||||
|
||||
versor o;
|
||||
glm_quat_nlerp(norot, add->sub2->cache[b].rotation, add->scale, o);
|
||||
glm_quat_mul(o, add->sub1->cache[b].rotation, add->cache[b].rotation);
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
void k3AnimationFree(struct k3Animation *anim) {
|
||||
if(!anim) return;
|
||||
|
||||
if(anim->ref != 0) {
|
||||
anim->ref--;
|
||||
return;
|
||||
}
|
||||
|
||||
if(anim->op == k3_ANIM_BLEND) {
|
||||
struct k3AnimationBlend *blend = (void*) anim;
|
||||
|
||||
for(size_t c = 0; c < blend->children; c++) {
|
||||
k3AnimationFree(blend->subs[c]);
|
||||
}
|
||||
free(blend->subs);
|
||||
|
||||
free(blend->weights);
|
||||
free(blend->offsets);
|
||||
free(blend->speeds);
|
||||
} else if(anim->op == k3_ANIM_ADD) {
|
||||
struct k3AnimationAdd *add = (void*) anim;
|
||||
|
||||
k3AnimationFree(add->sub1);
|
||||
k3AnimationFree(add->sub2);
|
||||
}
|
||||
|
||||
_mm_free(anim->cache);
|
||||
|
||||
free(anim);
|
||||
}
|
||||
70
src/k3anim.h
Normal file
70
src/k3anim.h
Normal file
@ -0,0 +1,70 @@
|
||||
#pragma once
|
||||
|
||||
#include<cglm/mat4.h>
|
||||
#include<cglm/quat.h>
|
||||
#include<stdint.h>
|
||||
#include<stddef.h>
|
||||
|
||||
struct k3AnimationBone {
|
||||
vec4 translation;
|
||||
versor rotation;
|
||||
};
|
||||
|
||||
enum k3AnimationOp {
|
||||
k3_ANIM_BASIC,
|
||||
k3_ANIM_BLEND,
|
||||
k3_ANIM_ADD,
|
||||
};
|
||||
|
||||
struct k3AnimationFountain {
|
||||
float fps;
|
||||
size_t frameCount;
|
||||
size_t bones;
|
||||
uint16_t id;
|
||||
_Alignas(16) struct k3AnimationBone frames[];
|
||||
};
|
||||
|
||||
struct k3Animation {
|
||||
enum k3AnimationOp op;
|
||||
size_t bones;
|
||||
struct k3AnimationBone *cache;
|
||||
size_t ref;
|
||||
};
|
||||
|
||||
struct k3AnimationBasic {
|
||||
enum k3AnimationOp op;
|
||||
size_t bones;
|
||||
struct k3AnimationBone *cache;
|
||||
size_t ref;
|
||||
|
||||
struct k3AnimationFountain *fountain;
|
||||
bool loop;
|
||||
};
|
||||
|
||||
struct k3AnimationBlend {
|
||||
enum k3AnimationOp op;
|
||||
size_t bones;
|
||||
struct k3AnimationBone *cache;
|
||||
size_t ref;
|
||||
|
||||
size_t children;
|
||||
float *offsets;
|
||||
float *speeds;
|
||||
float *weights;
|
||||
struct k3Animation **subs;
|
||||
};
|
||||
|
||||
struct k3AnimationAdd {
|
||||
enum k3AnimationOp op;
|
||||
size_t bones;
|
||||
struct k3AnimationBone *cache;
|
||||
size_t ref;
|
||||
|
||||
struct k3Animation *sub1;
|
||||
struct k3Animation *sub2;
|
||||
|
||||
float scale;
|
||||
};
|
||||
|
||||
bool k3AnimationUpdate(struct k3Animation *anim, float time);
|
||||
void k3AnimationFree(struct k3Animation *anim);
|
||||
Loading…
Reference in New Issue
Block a user