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Parse animations;

This commit is contained in:
bjorn 2018-12-15 17:27:23 -08:00 committed by Bjorn Swenson
parent 6b323e3476
commit 4ed3cad851
3 changed files with 396 additions and 243 deletions
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570
src/data/modelData.c
View File

@ -3,40 +3,35 @@
#include "lib/jsmn/jsmn.h"
#include <stdbool.h>
// Notes:
// - We parse in two passes.
// - In the first pass we figure out how much memory we need to allocate.
// - Then we allocate the memory and do a second pass to fill everything in.
// - Plan is to make this parser destructive, so it mutates the input Blob in order to avoid doing
// work in some situations, for speed. May make sense to provide a non-destructive option.
// - Currently this is most useful for reusing string memory by changing quotes to \0's.
// - Caveats:
// - The IO callback must not hang onto the filenames that are passed into it.
#define MAGIC_glTF 0x46546c67
#define MAGIC_JSON 0x4e4f534a
#define MAGIC_BIN 0x004e4942
#define KEY_EQ(k, s) !strncmp(k.data, s, k.length)
#define TOK_INT(j, t) strtol(j + t->start, NULL, 10)
#define TOK_BOOL(j, t) (*(j + t->start) == 't')
#define TOK_FLOAT(j, t) strtof(j + t->start, NULL)
#define NOM_KEY(j, t) hashKey((char*) j + (t++)->start)
#define NOM_INT(j, t) strtol(j + (t++)->start, NULL, 10)
#define NOM_BOOL(j, t) (*(j + (t++)->start) == 't')
#define NOM_FLOAT(j, t) strtof(j + (t++)->start, NULL)
typedef struct {
struct { int count; jsmntok_t* token; } accessors;
struct { int count; jsmntok_t* token; } blobs;
struct { int count; jsmntok_t* token; } views;
struct { int count; jsmntok_t* token; } nodes;
struct { int count; jsmntok_t* token; } meshes;
size_t totalSize;
jsmntok_t* accessors;
jsmntok_t* animations;
jsmntok_t* blobs;
jsmntok_t* views;
jsmntok_t* nodes;
jsmntok_t* meshes;
jsmntok_t* skins;
int childCount;
int primitiveCount;
int jointCount;
} gltfInfo;
static int nomString(const char* data, jsmntok_t* token, gltfString* string) {
lovrAssert(token->type == JSMN_STRING, "Expected string");
string->data = (char*) data + token->start;
string->length = token->end - token->start;
return 1;
static uint32_t hashKey(char* key) {
uint32_t hash = 0;
for (int i = 0; key[i] != '"'; i++) {
hash = (hash * 65599) + key[i];
}
return hash ^ (hash >> 16);
}
static int nomValue(const char* data, jsmntok_t* token, int count, int sum) {
@ -48,17 +43,14 @@ static int nomValue(const char* data, jsmntok_t* token, int count, int sum) {
}
}
// Kinda like sum(map(arr, obj => #obj[key]))
static jsmntok_t* aggregate(const char* json, jsmntok_t* token, const char* target, int* total) {
*total = 0;
// Kinda like total += sum(map(arr, obj => #obj[key]))
static jsmntok_t* aggregate(const char* json, jsmntok_t* token, uint32_t hash, int* total) {
int size = (token++)->size;
for (int i = 0; i < size; i++) {
if (token->size > 0) {
int keys = (token++)->size;
for (int k = 0; k < keys; k++) {
gltfString key;
token += nomString(json, token, &key);
if (KEY_EQ(key, target)) {
if (NOM_KEY(json, token) == hash) {
*total += token->size;
}
token += nomValue(json, token, 1, 0);
@ -68,39 +60,69 @@ static jsmntok_t* aggregate(const char* json, jsmntok_t* token, const char* targ
return token;
}
static void preparse(const char* json, jsmntok_t* tokens, int tokenCount, gltfInfo* info, size_t* dataSize) {
static void preparse(const char* json, jsmntok_t* tokens, int tokenCount, ModelData* model, gltfInfo* info) {
for (jsmntok_t* token = tokens + 1; token < tokens + tokenCount;) { // +1 to skip root object
gltfString key;
token += nomString(json, token, &key);
if (KEY_EQ(key, "accessors")) {
info->accessors.token = token;
info->accessors.count = token->size;
*dataSize += info->accessors.count * sizeof(ModelAccessor);
token += nomValue(json, token, 1, 0);
} else if (KEY_EQ(key, "buffers")) {
info->blobs.token = token;
info->blobs.count = token->size;
*dataSize += info->blobs.count * sizeof(ModelBlob);
token += nomValue(json, token, 1, 0);
} else if (KEY_EQ(key, "bufferViews")) {
info->views.token = token;
info->views.count = token->size;
*dataSize += info->views.count * sizeof(ModelView);
token += nomValue(json, token, 1, 0);
} else if (KEY_EQ(key, "nodes")) {
info->nodes.token = token;
info->nodes.count = token->size;
*dataSize += info->nodes.count * sizeof(ModelNode);
token = aggregate(json, token, "children", &info->childCount);
} else if (KEY_EQ(key, "meshes")) {
info->meshes.token = token;
info->meshes.count = token->size;
*dataSize += info->meshes.count * sizeof(ModelMesh);
token = aggregate(json, token, "primitives", &info->primitiveCount);
*dataSize += info->primitiveCount * sizeof(ModelPrimitive);
} else {
token += nomValue(json, token, 1, 0); // Skip
switch (NOM_KEY(json, token)) {
case HASH16("accessors"):
info->accessors = token;
model->accessorCount = token->size;
info->totalSize += token->size * sizeof(ModelAccessor);
token += nomValue(json, token, 1, 0);
break;
case HASH16("animations"):
info->animations = token;
model->animationCount = token->size;
info->totalSize += token->size * sizeof(ModelAnimation);
// Almost like aggregate, but we gotta aggregate 2 keys in a single pass
int size = (token++)->size;
for (int i = 0; i < size; i++) {
if (token->size > 0) {
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
switch (NOM_KEY(json, token)) {
case HASH16("channels"): model->animationChannelCount += token->size; break;
case HASH16("samplers"): model->animationSamplerCount += token->size; break;
default: break;
}
token += nomValue(json, token, 1, 0);
}
}
}
break;
case HASH16("buffers"):
info->blobs = token;
model->blobCount = token->size;
info->totalSize += token->size * sizeof(ModelBlob);
token += nomValue(json, token, 1, 0);
break;
case HASH16("bufferViews"):
info->views = token;
model->viewCount = token->size;
info->totalSize += token->size * sizeof(ModelView);
token += nomValue(json, token, 1, 0);
break;
case HASH16("nodes"):
info->nodes = token;
model->nodeCount = token->size;
info->totalSize += token->size * sizeof(ModelNode);
token = aggregate(json, token, HASH16("children"), &info->childCount);
info->totalSize += info->childCount * sizeof(uint32_t);
break;
case HASH16("meshes"):
info->meshes = token;
model->meshCount = token->size;
info->totalSize += token->size * sizeof(ModelMesh);
token = aggregate(json, token, HASH16("primitives"), &model->primitiveCount);
info->totalSize += model->primitiveCount * sizeof(ModelPrimitive);
break;
case HASH16("skins"):
info->skins = token;
model->skinCount = token->size;
info->totalSize += token->size * sizeof(ModelSkin);
token = aggregate(json, token, HASH16("joints"), &info->jointCount);
info->totalSize += info->jointCount * sizeof(uint32_t);
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
}
@ -111,44 +133,117 @@ static void parseAccessors(const char* json, jsmntok_t* token, ModelData* model)
int count = (token++)->size;
for (int i = 0; i < count; i++) {
ModelAccessor* accessor = &model->accessors[i];
gltfString key;
int keyCount = (token++)->size;
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
token += nomString(json, token, &key);
if (KEY_EQ(key, "bufferView")) {
accessor->view = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "count")) {
accessor->count = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "byteOffset")) {
accessor->offset = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "componentType")) {
switch (TOK_INT(json, token)) {
case 5120: accessor->type = I8; break;
case 5121: accessor->type = U8; break;
case 5122: accessor->type = I16; break;
case 5123: accessor->type = U16; break;
case 5125: accessor->type = U32; break;
case 5126: accessor->type = F32; break;
default: break;
switch (NOM_KEY(json, token)) {
case HASH16("bufferView"): accessor->view = NOM_INT(json, token); break;
case HASH16("count"): accessor->count = NOM_INT(json, token); break;
case HASH16("byteOffset"): accessor->offset = NOM_INT(json, token); break;
case HASH16("normalized"): accessor->normalized = NOM_BOOL(json, token); break;
case HASH16("componentType"):
switch (NOM_INT(json, token)) {
case 5120: accessor->type = I8; break;
case 5121: accessor->type = U8; break;
case 5122: accessor->type = I16; break;
case 5123: accessor->type = U16; break;
case 5125: accessor->type = U32; break;
case 5126: accessor->type = F32; break;
default: break;
}
break;
case HASH16("type"):
switch (NOM_KEY(json, token)) {
case HASH16("SCALAR"): accessor->components += 1; break;
case HASH16("VEC2"): accessor->components += 2; break;
case HASH16("VEC3"): accessor->components += 3; break;
case HASH16("VEC4"): accessor->components += 4; break;
default: lovrThrow("Unsupported accessor type"); break;
}
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
}
}
static jsmntok_t* parseAnimationChannel(const char* json, jsmntok_t* token, int index, ModelData* model) {
ModelAnimationChannel* channel = &model->animationChannels[index];
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
switch (NOM_KEY(json, token)) {
case HASH16("sampler"): channel->sampler = NOM_INT(json, token); break;
case HASH16("target"): {
int targetKeyCount = (token++)->size;
for (int tk = 0; tk < targetKeyCount; tk++) {
switch (NOM_KEY(json, token)) {
case HASH16("node"): channel->nodeIndex = NOM_INT(json, token); break;
case HASH16("path"):
switch (NOM_KEY(json, token)) {
case HASH16("translation"): channel->property = PROP_TRANSLATION; break;
case HASH16("rotation"): channel->property = PROP_ROTATION; break;
case HASH16("scale"): channel->property = PROP_SCALE; break;
default: lovrThrow("Unknown animation target path"); break;
}
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
token++;
} else if (KEY_EQ(key, "type")) {
gltfString type;
token += nomString(json, token, &type);
if (KEY_EQ(type, "SCALAR")) {
accessor->components = 1;
} else if (type.length == 4 && type.data[0] == 'V') {
accessor->components = type.data[3] - '0';
} else if (type.length == 4 && type.data[0] == 'M') {
lovrThrow("Matrix accessors are not supported");
} else {
lovrThrow("Unknown attribute type");
}
default: token += nomValue(json, token, 1, 0); break;
}
}
return token;
}
static jsmntok_t* parseAnimationSampler(const char* json, jsmntok_t* token, int index, ModelData* model) {
ModelAnimationSampler* sampler = &model->animationSamplers[index];
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
switch (NOM_KEY(json, token)) {
case HASH16("input"): sampler->times = NOM_INT(json, token); break;
case HASH16("output"): sampler->values = NOM_INT(json, token); break;
case HASH16("interpolation"):
switch (NOM_KEY(json, token)) {
case HASH16("LINEAR"): sampler->smoothing = SMOOTH_LINEAR; break;
case HASH16("STEP"): sampler->smoothing = SMOOTH_STEP; break;
case HASH16("CUBICSPLINE"): sampler->smoothing = SMOOTH_CUBIC; break;
default: lovrThrow("Unknown animation sampler interpolation"); break;
}
} else if (KEY_EQ(key, "normalized")) {
accessor->normalized = TOK_BOOL(json, token), token++;
} else {
token += nomValue(json, token, 1, 0); // Skip
break;
default: token += nomValue(json, token, 1, 0);
}
}
return token;
}
static void parseAnimations(const char* json, jsmntok_t* token, ModelData* model) {
if (!token) return;
int channelIndex = 0;
int samplerIndex = 0;
int count = (token++)->size;
for (int i = 0; i < count; i++) {
ModelAnimation* animation = &model->animations[i];
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
switch (NOM_KEY(json, token)) {
case HASH16("channels"):
animation->channelCount = token->size;
animation->channels = &model->animationChannels[channelIndex];
for (int j = 0; j < animation->channelCount; j++) {
token = parseAnimationChannel(json, token, channelIndex++, model);
}
break;
case HASH16("samplers"):
animation->samplerCount = token->size;
animation->samplers = &model->animationSamplers[samplerIndex];
for (int j = 0; j < animation->samplerCount; j++) {
token = parseAnimationSampler(json, token, samplerIndex++, model);
}
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
}
@ -160,24 +255,23 @@ static void parseBlobs(const char* json, jsmntok_t* token, ModelData* model, Mod
int count = (token++)->size;
for (int i = 0; i < count; i++) {
ModelBlob* blob = &model->blobs[i];
gltfString key;
int keyCount = (token++)->size;
size_t bytesRead = 0;
bool hasUri = false;
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
token += nomString(json, token, &key);
if (KEY_EQ(key, "byteLength")) {
blob->size = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "uri")) {
hasUri = true;
gltfString filename;
token += nomString(json, token, &filename);
filename.data[filename.length] = '\0'; // Change the quote into a terminator (I'll be b0k)
blob->data = io.read(filename.data, &bytesRead);
lovrAssert(blob->data, "Unable to read %s", filename.data);
} else {
token += nomValue(json, token, 1, 0); // Skip
switch (NOM_KEY(json, token)) {
case HASH16("byteLength"): blob->size = NOM_INT(json, token); break;
case HASH16("uri"):
hasUri = true;
char* filename = (char*) json + token->start;
size_t length = token->end - token->start;
filename[length] = '\0'; // Change the quote into a terminator (I'll be b0k)
blob->data = io.read(filename, &bytesRead);
lovrAssert(blob->data, "Unable to read %s", filename);
filename[length] = '"';
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
@ -196,21 +290,15 @@ static void parseViews(const char* json, jsmntok_t* token, ModelData* model) {
int count = (token++)->size;
for (int i = 0; i < count; i++) {
ModelView* view = &model->views[i];
gltfString key;
int keyCount = (token++)->size;
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
token += nomString(json, token, &key);
if (KEY_EQ(key, "buffer")) {
view->blob = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "byteOffset")) {
view->offset = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "byteLength")) {
view->length = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "byteStride")) {
view->stride = TOK_INT(json, token), token++;
} else {
token += nomValue(json, token, 1, 0); // Skip
switch (NOM_KEY(json, token)) {
case HASH16("buffer"): view->blob = NOM_INT(json, token); break;
case HASH16("byteOffset"): view->offset = NOM_INT(json, token); break;
case HASH16("byteLength"): view->length = NOM_INT(json, token); break;
case HASH16("byteStride"): view->stride = NOM_INT(json, token); break;
default: token += nomValue(json, token, 1, 0); break;
}
}
}
@ -228,43 +316,45 @@ static void parseNodes(const char* json, jsmntok_t* token, ModelData* model) {
float scale[3] = { 1, 1, 1 };
bool matrix = false;
gltfString key;
int keyCount = (token++)->size; // Enter object
for (int k = 0; k < keyCount; k++) {
token += nomString(json, token, &key);
if (KEY_EQ(key, "children")) {
node->children = &model->childMap[childIndex];
node->childCount = (token++)->size;
for (uint32_t j = 0; j < node->childCount; j++) {
model->childMap[childIndex++] = TOK_INT(json, token), token++;
}
} else if (KEY_EQ(key, "mesh")) {
node->mesh = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "matrix")) {
lovrAssert(token->size == 16, "Node matrix needs 16 elements");
matrix = true;
for (int j = 0; j < token->size; j++) {
node->transform[j] = TOK_FLOAT(json, token), token++;
}
} else if (KEY_EQ(key, "translation")) {
lovrAssert(token->size == 3, "Node translation needs 3 elements");
translation[0] = TOK_FLOAT(json, token), token++;
translation[1] = TOK_FLOAT(json, token), token++;
translation[2] = TOK_FLOAT(json, token), token++;
} else if (KEY_EQ(key, "rotation")) {
lovrAssert(token->size == 4, "Node rotation needs 4 elements");
rotation[0] = TOK_FLOAT(json, token), token++;
rotation[1] = TOK_FLOAT(json, token), token++;
rotation[2] = TOK_FLOAT(json, token), token++;
rotation[3] = TOK_FLOAT(json, token), token++;
} else if (KEY_EQ(key, "scale")) {
lovrAssert(token->size == 3, "Node scale needs 3 elements");
scale[0] = TOK_FLOAT(json, token), token++;
scale[1] = TOK_FLOAT(json, token), token++;
scale[2] = TOK_FLOAT(json, token), token++;
} else {
token += nomValue(json, token, 1, 0); // Skip
switch (NOM_KEY(json, token)) {
case HASH16("mesh"): node->mesh = NOM_INT(json, token); break;
case HASH16("skin"): node->skin = NOM_INT(json, token); break;
case HASH16("children"):
node->children = &model->nodeChildren[childIndex];
node->childCount = (token++)->size;
for (uint32_t j = 0; j < node->childCount; j++) {
model->nodeChildren[childIndex++] = NOM_INT(json, token);
}
break;
case HASH16("matrix"):
lovrAssert(token->size == 16, "Node matrix needs 16 elements");
matrix = true;
for (int j = 0; j < token->size; j++) {
node->transform[j] = NOM_FLOAT(json, token);
}
break;
case HASH16("translation"):
lovrAssert(token->size == 3, "Node translation needs 3 elements");
translation[0] = NOM_FLOAT(json, token);
translation[1] = NOM_FLOAT(json, token);
translation[2] = NOM_FLOAT(json, token);
break;
case HASH16("rotation"):
lovrAssert(token->size == 4, "Node rotation needs 4 elements");
rotation[0] = NOM_FLOAT(json, token);
rotation[1] = NOM_FLOAT(json, token);
rotation[2] = NOM_FLOAT(json, token);
rotation[3] = NOM_FLOAT(json, token);
break;
case HASH16("scale"):
lovrAssert(token->size == 3, "Node scale needs 3 elements");
scale[0] = NOM_FLOAT(json, token);
scale[1] = NOM_FLOAT(json, token);
scale[2] = NOM_FLOAT(json, token);
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
@ -279,57 +369,45 @@ static void parseNodes(const char* json, jsmntok_t* token, ModelData* model) {
}
static jsmntok_t* parsePrimitive(const char* json, jsmntok_t* token, int index, ModelData* model) {
gltfString key;
ModelPrimitive* primitive = &model->primitives[index];
int keyCount = (token++)->size; // Enter object
memset(primitive->attributes, 0xff, sizeof(primitive->attributes));
primitive->indices = -1;
primitive->mode = DRAW_TRIANGLES;
int keyCount = (token++)->size; // Enter object
for (int k = 0; k < keyCount; k++) {
token += nomString(json, token, &key);
if (KEY_EQ(key, "material")) {
primitive->material = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "indices")) {
primitive->indices = TOK_INT(json, token), token++;
} else if (KEY_EQ(key, "mode")) {
switch (TOK_INT(json, token)) {
case 0: primitive->mode = DRAW_POINTS; break;
case 1: primitive->mode = DRAW_LINES; break;
case 2: primitive->mode = DRAW_LINE_LOOP; break;
case 3: primitive->mode = DRAW_LINE_STRIP; break;
case 4: primitive->mode = DRAW_TRIANGLES; break;
case 5: primitive->mode = DRAW_TRIANGLE_STRIP; break;
case 6: primitive->mode = DRAW_TRIANGLE_FAN; break;
default: lovrThrow("Unknown primitive mode");
}
token++;
} else if (KEY_EQ(key, "attributes")) {
int attributeCount = (token++)->size;
for (int i = 0; i < attributeCount; i++) {
gltfString name;
token += nomString(json, token, &name);
int accessor = TOK_INT(json, token);
if (KEY_EQ(name, "POSITION")) {
primitive->attributes[ATTR_POSITION] = accessor;
} else if (KEY_EQ(name, "NORMAL")) {
primitive->attributes[ATTR_NORMAL] = accessor;
} else if (KEY_EQ(name, "TEXCOORD_0")) {
primitive->attributes[ATTR_TEXCOORD] = accessor;
} else if (KEY_EQ(name, "COLOR_0")) {
primitive->attributes[ATTR_COLOR] = accessor;
} else if (KEY_EQ(name, "TANGENT")) {
primitive->attributes[ATTR_TANGENT] = accessor;
} else if (KEY_EQ(name, "JOINTS_0")) {
primitive->attributes[ATTR_BONES] = accessor;
} else if (KEY_EQ(name, "WEIGHTS_0")) {
primitive->attributes[ATTR_WEIGHTS] = accessor;
switch (NOM_KEY(json, token)) {
case HASH16("material"): primitive->material = NOM_INT(json, token); break;
case HASH16("indices"): primitive->indices = NOM_INT(json, token); break;
case HASH16("mode"):
switch (NOM_INT(json, token)) {
case 0: primitive->mode = DRAW_POINTS; break;
case 1: primitive->mode = DRAW_LINES; break;
case 2: primitive->mode = DRAW_LINE_LOOP; break;
case 3: primitive->mode = DRAW_LINE_STRIP; break;
case 4: primitive->mode = DRAW_TRIANGLES; break;
case 5: primitive->mode = DRAW_TRIANGLE_STRIP; break;
case 6: primitive->mode = DRAW_TRIANGLE_FAN; break;
default: lovrThrow("Unknown primitive mode");
}
token++;
break;
case HASH16("attributes"): {
int attributeCount = (token++)->size;
for (int i = 0; i < attributeCount; i++) {
switch (NOM_KEY(json, token)) {
case HASH16("POSITION"): primitive->attributes[ATTR_POSITION] = NOM_INT(json, token); break;
case HASH16("NORMAL"): primitive->attributes[ATTR_NORMAL] = NOM_INT(json, token); break;
case HASH16("TEXCOORD_0"): primitive->attributes[ATTR_TEXCOORD] = NOM_INT(json, token); break;
case HASH16("COLOR_0"): primitive->attributes[ATTR_COLOR] = NOM_INT(json, token); break;
case HASH16("TANGENT"): primitive->attributes[ATTR_TANGENT] = NOM_INT(json, token); break;
case HASH16("JOINTS_0"): primitive->attributes[ATTR_BONES] = NOM_INT(json, token); break;
case HASH16("WEIGHTS_0"): primitive->attributes[ATTR_WEIGHTS] = NOM_INT(json, token); break;
default: break;
}
}
break;
}
} else {
token += nomValue(json, token, 1, 0); // Skip
default: token += nomValue(json, token, 1, 0); break;
}
}
return token;
@ -341,20 +419,45 @@ static void parseMeshes(const char* json, jsmntok_t* token, ModelData* model) {
int primitiveIndex = 0;
int count = (token++)->size; // Enter array
for (int i = 0; i < count; i++) {
gltfString key;
ModelMesh* mesh = &model->meshes[i];
int keyCount = (token++)->size; // Enter object
for (int k = 0; k < keyCount; k++) {
token += nomString(json, token, &key);
switch (NOM_KEY(json, token)) {
case HASH16("primitives"):
mesh->primitives = &model->primitives[primitiveIndex];
mesh->primitiveCount = (token++)->size;
for (uint32_t j = 0; j < mesh->primitiveCount; j++) {
token = parsePrimitive(json, token, primitiveIndex++, model);
}
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
}
}
if (KEY_EQ(key, "primitives")) {
mesh->primitives = &model->primitives[primitiveIndex];
mesh->primitiveCount = (token++)->size;
for (uint32_t j = 0; j < mesh->primitiveCount; j++) {
token = parsePrimitive(json, token, primitiveIndex++, model);
}
} else {
token += nomValue(json, token, 1, 0); // Skip
static void parseSkins(const char* json, jsmntok_t* token, ModelData* model) {
if (!token) return;
int jointIndex = 0;
int count = (token++)->size; // Enter array
for (int i = 0; i < count; i++) {
ModelSkin* skin = &model->skins[i];
int keyCount = (token++)->size;
for (int k = 0; k < keyCount; k++) {
switch (NOM_KEY(json, token)) {
case HASH64("inverseBindMatrices"): skin->inverseBindMatrices = NOM_INT(json, token); break;
case HASH16("skeleton"): skin->skeleton = NOM_INT(json, token); break;
case HASH16("joints"):
skin->joints = &model->skinJoints[jointIndex];
skin->jointCount = (token++)->size;
for (uint32_t j = 0; j < skin->jointCount; j++) {
model->skinJoints[jointIndex++] = NOM_INT(json, token);
}
break;
default: token += nomValue(json, token, 1, 0); break;
}
}
}
@ -391,38 +494,37 @@ ModelData* lovrModelDataInit(ModelData* model, Blob* blob, ModelDataIO io) {
jsmn_parser parser;
jsmn_init(&parser);
jsmntok_t tokens[1024]; // TODO malloc or token queue
int tokenCount = jsmn_parse(&parser, jsonData, jsonLength, tokens, 1024);
lovrAssert(tokenCount >= 0, "Invalid JSON");
lovrAssert(tokens[0].type == JSMN_OBJECT, "No root object");
gltfInfo info = { 0 };
size_t dataSize = 0;
preparse(jsonData, tokens, tokenCount, &info, &dataSize);
preparse(jsonData, tokens, tokenCount, model, &info);
size_t offset = 0;
model->data = calloc(1, dataSize);
model->glbBlob = glb ? blob : NULL;
model->accessorCount = info.accessors.count;
model->blobCount = info.blobs.count;
model->viewCount = info.views.count;
model->meshCount = info.meshes.count;
model->nodeCount = info.nodes.count;
model->primitiveCount = info.primitiveCount;
model->accessors = (ModelAccessor*) (model->data + offset), offset += info.accessors.count * sizeof(ModelAccessor);
model->blobs = (ModelBlob*) (model->data + offset), offset += info.blobs.count * sizeof(ModelBlob);
model->views = (ModelView*) (model->data + offset), offset += info.views.count * sizeof(ModelView);
model->meshes = (ModelMesh*) (model->data + offset), offset += info.meshes.count * sizeof(ModelMesh);
model->nodes = (ModelNode*) (model->data + offset), offset += info.nodes.count * sizeof(ModelNode);
model->primitives = (ModelPrimitive*) (model->data + offset), offset += info.primitiveCount * sizeof(ModelPrimitive);
model->childMap = (uint32_t*) (model->data + offset), offset += info.childCount * sizeof(uint32_t);
model->data = calloc(1, info.totalSize);
model->binaryBlob = glb ? blob : NULL;
model->accessors = (ModelAccessor*) (model->data + offset), offset += model->accessorCount * sizeof(ModelAccessor);
model->animationChannels = (ModelAnimationChannel*) (model->data + offset), offset += model->animationChannelCount * sizeof(ModelAnimationChannel);
model->animationSamplers = (ModelAnimationSampler*) (model->data + offset), offset += model->animationSamplerCount * sizeof(ModelAnimationSampler);
model->animations = (ModelAnimation*) (model->data + offset), offset += model->animationCount * sizeof(ModelAnimation);
model->blobs = (ModelBlob*) (model->data + offset), offset += model->blobCount * sizeof(ModelBlob);
model->views = (ModelView*) (model->data + offset), offset += model->viewCount * sizeof(ModelView);
model->primitives = (ModelPrimitive*) (model->data + offset), offset += model->primitiveCount * sizeof(ModelPrimitive);
model->meshes = (ModelMesh*) (model->data + offset), offset += model->meshCount * sizeof(ModelMesh);
model->nodes = (ModelNode*) (model->data + offset), offset += model->nodeCount * sizeof(ModelNode);
model->skins = (ModelSkin*) (model->data + offset), offset += model->skinCount * sizeof(ModelSkin);
model->nodeChildren = (uint32_t*) (model->data + offset), offset += info.childCount * sizeof(uint32_t);
model->skinJoints = (uint32_t*) (model->data + offset), offset += info.jointCount * sizeof(uint32_t);
parseAccessors(jsonData, info.accessors.token, model);
parseBlobs(jsonData, info.blobs.token, model, io, (void*) binData);
parseViews(jsonData, info.views.token, model);
parseNodes(jsonData, info.nodes.token, model);
parseMeshes(jsonData, info.meshes.token, model);
parseAccessors(jsonData, info.accessors, model);
parseAnimations(jsonData, info.animations, model);
parseBlobs(jsonData, info.blobs, model, io, (void*) binData);
parseViews(jsonData, info.views, model);
parseNodes(jsonData, info.nodes, model);
parseMeshes(jsonData, info.meshes, model);
parseSkins(jsonData, info.skins, model);
return model;
}

61
src/data/modelData.h
View File

@ -28,6 +28,18 @@ typedef enum {
DRAW_TRIANGLE_FAN
} DrawMode;
typedef enum {
SMOOTH_STEP,
SMOOTH_LINEAR,
SMOOTH_CUBIC,
} SmoothMode;
typedef enum {
PROP_TRANSLATION,
PROP_ROTATION,
PROP_SCALE,
} AnimationProperty;
typedef enum { I8, U8, I16, U16, I32, U32, F32 } AttributeType;
typedef struct {
@ -41,11 +53,6 @@ typedef struct {
uint32_t type;
} gltfChunkHeader;
typedef struct {
char* data;
size_t length;
} gltfString;
typedef struct {
int view;
int count;
@ -55,6 +62,25 @@ typedef struct {
int normalized : 1;
} ModelAccessor;
typedef struct {
int nodeIndex;
AnimationProperty property;
int sampler;
} ModelAnimationChannel;
typedef struct {
int times;
int values;
SmoothMode smoothing;
} ModelAnimationSampler;
typedef struct {
ModelAnimationChannel* channels;
ModelAnimationSampler* samplers;
int channelCount;
int samplerCount;
} ModelAnimation;
typedef struct {
void* data;
size_t size;
@ -84,8 +110,16 @@ typedef struct {
uint32_t* children;
uint32_t childCount;
int mesh;
int skin;
} ModelNode;
typedef struct {
uint32_t* joints;
uint32_t jointCount;
int skeleton;
int inverseBindMatrices;
} ModelSkin;
typedef struct {
double time;
float data[4];
@ -112,20 +146,29 @@ typedef struct {
typedef struct {
Ref ref;
uint8_t* data;
Blob* glbBlob;
Blob* binaryBlob;
ModelAccessor* accessors;
ModelAnimationChannel* animationChannels;
ModelAnimationSampler* animationSamplers;
ModelAnimation* animations;
ModelBlob* blobs;
ModelView* views;
ModelPrimitive* primitives;
ModelMesh* meshes;
ModelNode* nodes;
ModelPrimitive* primitives;
uint32_t* childMap;
ModelSkin* skins;
int accessorCount;
int animationChannelCount;
int animationSamplerCount;
int animationCount;
int blobCount;
int viewCount;
int primitiveCount;
int meshCount;
int nodeCount;
int primitiveCount;
int skinCount;
uint32_t* nodeChildren;
uint32_t* skinJoints;
} ModelData;
typedef struct {

8
src/util.h
View File

@ -36,6 +36,14 @@
#define CLAMP(x, min, max) MAX(min, MIN(max, x))
#define ALIGN(p, n) ((uintptr_t) p & -n)
#define STRLEN(s) (sizeof(s) / sizeof(s[0]) - 1)
#define H1(s, i, x) ((x * 65599u) + (uint8_t) s[(i) < STRLEN(s) ? STRLEN(s) - 1 - (i) : STRLEN(s)])
#define H4(s, i, x) H1(s, i + 0, H1(s, i + 1, H1(s, i + 2, H1(s, i + 3, x))))
#define H16(s, i, x) H4(s, i + 0, H4(s, i + 4, H4(s, i + 8, H4(s, i + 12, x))))
#define H64(s, i, x) H16(s, i + 0, H16(s, i + 16, H16(s, i + 32, H16(s, i + 48, x))))
#define HASH16(s) ((uint32_t) (H16(s, 0, 0) ^ (H16(s, 0, 0) >> 16)))
#define HASH64(s) ((uint32_t) (H64(s, 0, 0) ^ (H64(s, 0, 0) >> 16)))
typedef struct ref {
void (*destructor)(void*);
const char* type;