From bd57f345ed9dbed1d81683e48199626de2ea9044 Mon Sep 17 00:00:00 2001 From: 3gg <3gg@shellblade.net> Date: Fri, 27 Jun 2025 10:18:39 -0700 Subject: Restructure project --- contrib/cgltf/cgltf_write.h | 1173 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1173 insertions(+) create mode 100644 contrib/cgltf/cgltf_write.h (limited to 'contrib/cgltf/cgltf_write.h') diff --git a/contrib/cgltf/cgltf_write.h b/contrib/cgltf/cgltf_write.h new file mode 100644 index 0000000..2096a5b --- /dev/null +++ b/contrib/cgltf/cgltf_write.h @@ -0,0 +1,1173 @@ +/** + * cgltf_write - a single-file glTF 2.0 writer written in C99. + * + * Version: 1.7 + * + * Website: https://github.com/jkuhlmann/cgltf + * + * Distributed under the MIT License, see notice at the end of this file. + * + * Building: + * Include this file where you need the struct and function + * declarations. Have exactly one source file where you define + * `CGLTF_WRITE_IMPLEMENTATION` before including this file to get the + * function definitions. + * + * Reference: + * `cgltf_result cgltf_write_file(const cgltf_options* options, const char* + * path, const cgltf_data* data)` writes JSON to the given file path. Buffer + * files and external images are not written out. `data` is not deallocated. + * + * `cgltf_size cgltf_write(const cgltf_options* options, char* buffer, + * cgltf_size size, const cgltf_data* data)` writes JSON into the given memory + * buffer. Returns the number of bytes written to `buffer`, including a null + * terminator. If buffer is null, returns the number of bytes that would have + * been written. `data` is not deallocated. + * + * To write custom JSON into the `extras` field, aggregate all the custom JSON + * into a single buffer, then set `file_data` to this buffer. By supplying + * start_offset and end_offset values for various objects, you can select a + * range of characters within the aggregated buffer. + */ +#ifndef CGLTF_WRITE_H_INCLUDED__ +#define CGLTF_WRITE_H_INCLUDED__ + +#include "cgltf.h" + +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data); +cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data); + +#ifdef __cplusplus +} +#endif + +#endif /* #ifndef CGLTF_WRITE_H_INCLUDED__ */ + +/* + * + * Stop now, if you are only interested in the API. + * Below, you find the implementation. + * + */ + +#if defined(__INTELLISENSE__) || defined(__JETBRAINS_IDE__) +/* This makes MSVC/CLion intellisense work. */ +#define CGLTF_IMPLEMENTATION +#endif + +#ifdef CGLTF_WRITE_IMPLEMENTATION + +#include +#include +#include +#include + +#define CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM (1 << 0) +#define CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT (1 << 1) +#define CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS (1 << 2) +#define CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL (1 << 3) +#define CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION (1 << 4) +#define CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT (1 << 5) +#define CGLTF_EXTENSION_FLAG_MATERIALS_IOR (1 << 6) +#define CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR (1 << 7) +#define CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION (1 << 8) + +typedef struct { + char* buffer; + cgltf_size buffer_size; + cgltf_size remaining; + char* cursor; + cgltf_size tmp; + cgltf_size chars_written; + const cgltf_data* data; + int depth; + const char* indent; + int needs_comma; + uint32_t extension_flags; + uint32_t required_extension_flags; +} cgltf_write_context; + +#define CGLTF_MIN(a, b) (a < b ? a : b) + +#define CGLTF_SPRINTF(...) { \ + context->tmp = snprintf ( context->cursor, context->remaining, __VA_ARGS__ ); \ + context->chars_written += context->tmp; \ + if (context->cursor) { \ + context->cursor += context->tmp; \ + context->remaining -= context->tmp; \ + } } + +#define CGLTF_SNPRINTF(length, ...) { \ + context->tmp = snprintf ( context->cursor, CGLTF_MIN(length + 1, context->remaining), __VA_ARGS__ ); \ + context->chars_written += length; \ + if (context->cursor) { \ + context->cursor += length; \ + context->remaining -= length; \ + } } + +#define CGLTF_WRITE_IDXPROP(label, val, start) if (val) { \ + cgltf_write_indent(context); \ + CGLTF_SPRINTF("\"%s\": %d", label, (int) (val - start)); \ + context->needs_comma = 1; } + +#define CGLTF_WRITE_IDXARRPROP(label, dim, vals, start) if (vals) { \ + cgltf_write_indent(context); \ + CGLTF_SPRINTF("\"%s\": [", label); \ + for (int i = 0; i < (int)(dim); ++i) { \ + int idx = (int) (vals[i] - start); \ + if (i != 0) CGLTF_SPRINTF(","); \ + CGLTF_SPRINTF(" %d", idx); \ + } \ + CGLTF_SPRINTF(" ]"); \ + context->needs_comma = 1; } + +#define CGLTF_WRITE_TEXTURE_INFO(label, info) if (info.texture) { \ + cgltf_write_line(context, "\"" label "\": {"); \ + CGLTF_WRITE_IDXPROP("index", info.texture, context->data->textures); \ + cgltf_write_intprop(context, "texCoord", info.texcoord, 0); \ + cgltf_write_floatprop(context, "scale", info.scale, 1.0f); \ + if (info.has_transform) { \ + context->extension_flags |= CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM; \ + cgltf_write_texture_transform(context, &info.transform); \ + } \ + cgltf_write_extras(context, &info.extras); \ + cgltf_write_line(context, "}"); } + +static void cgltf_write_indent(cgltf_write_context* context) +{ + if (context->needs_comma) + { + CGLTF_SPRINTF(",\n"); + context->needs_comma = 0; + } + else + { + CGLTF_SPRINTF("\n"); + } + for (int i = 0; i < context->depth; ++i) + { + CGLTF_SPRINTF("%s", context->indent); + } +} + +static void cgltf_write_line(cgltf_write_context* context, const char* line) +{ + if (line[0] == ']' || line[0] == '}') + { + --context->depth; + context->needs_comma = 0; + } + cgltf_write_indent(context); + CGLTF_SPRINTF("%s", line); + cgltf_size last = (cgltf_size)(strlen(line) - 1); + if (line[0] == ']' || line[0] == '}') + { + context->needs_comma = 1; + } + if (line[last] == '[' || line[last] == '{') + { + ++context->depth; + context->needs_comma = 0; + } +} + +static void cgltf_write_strprop(cgltf_write_context* context, const char* label, const char* val) +{ + if (val) + { + cgltf_write_indent(context); + CGLTF_SPRINTF("\"%s\": \"%s\"", label, val); + context->needs_comma = 1; + } +} + +static void cgltf_write_extras(cgltf_write_context* context, const cgltf_extras* extras) +{ + cgltf_size length = extras->end_offset - extras->start_offset; + if (length > 0 && context->data->file_data) + { + char* json_string = ((char*) context->data->file_data) + extras->start_offset; + cgltf_write_indent(context); + CGLTF_SPRINTF("%s", "\"extras\": "); + CGLTF_SNPRINTF(length, "%s", json_string); + context->needs_comma = 1; + } +} + +static void cgltf_write_stritem(cgltf_write_context* context, const char* item) +{ + cgltf_write_indent(context); + CGLTF_SPRINTF("\"%s\"", item); + context->needs_comma = 1; +} + +static void cgltf_write_intprop(cgltf_write_context* context, const char* label, int val, int def) +{ + if (val != def) + { + cgltf_write_indent(context); + CGLTF_SPRINTF("\"%s\": %d", label, val); + context->needs_comma = 1; + } +} + +static void cgltf_write_floatprop(cgltf_write_context* context, const char* label, float val, float def) +{ + if (val != def) + { + cgltf_write_indent(context); + CGLTF_SPRINTF("\"%s\": ", label); + CGLTF_SPRINTF("%g", val); + context->needs_comma = 1; + + if (context->cursor) + { + char *decimal_comma = strchr(context->cursor - context->tmp, ','); + if (decimal_comma) + { + *decimal_comma = '.'; + } + } + } +} + +static void cgltf_write_boolprop_optional(cgltf_write_context* context, const char* label, bool val, bool def) +{ + if (val != def) + { + cgltf_write_indent(context); + CGLTF_SPRINTF("\"%s\": %s", label, val ? "true" : "false"); + context->needs_comma = 1; + } +} + +static void cgltf_write_floatarrayprop(cgltf_write_context* context, const char* label, const cgltf_float* vals, cgltf_size dim) +{ + cgltf_write_indent(context); + CGLTF_SPRINTF("\"%s\": [", label); + for (cgltf_size i = 0; i < dim; ++i) + { + if (i != 0) + { + CGLTF_SPRINTF(", %g", vals[i]); + } + else + { + CGLTF_SPRINTF("%g", vals[i]); + } + } + CGLTF_SPRINTF("]"); + context->needs_comma = 1; +} + +static bool cgltf_check_floatarray(const float* vals, int dim, float val) { + while (dim--) + { + if (vals[dim] != val) + { + return true; + } + } + return false; +} + +static int cgltf_int_from_component_type(cgltf_component_type ctype) +{ + switch (ctype) + { + case cgltf_component_type_r_8: return 5120; + case cgltf_component_type_r_8u: return 5121; + case cgltf_component_type_r_16: return 5122; + case cgltf_component_type_r_16u: return 5123; + case cgltf_component_type_r_32u: return 5125; + case cgltf_component_type_r_32f: return 5126; + default: return 0; + } +} + +static const char* cgltf_str_from_alpha_mode(cgltf_alpha_mode alpha_mode) +{ + switch (alpha_mode) + { + case cgltf_alpha_mode_mask: return "MASK"; + case cgltf_alpha_mode_blend: return "BLEND"; + default: return NULL; + } +} + +static const char* cgltf_str_from_type(cgltf_type type) +{ + switch (type) + { + case cgltf_type_scalar: return "SCALAR"; + case cgltf_type_vec2: return "VEC2"; + case cgltf_type_vec3: return "VEC3"; + case cgltf_type_vec4: return "VEC4"; + case cgltf_type_mat2: return "MAT2"; + case cgltf_type_mat3: return "MAT3"; + case cgltf_type_mat4: return "MAT4"; + default: return NULL; + } +} + +static cgltf_size cgltf_dim_from_type(cgltf_type type) +{ + switch (type) + { + case cgltf_type_scalar: return 1; + case cgltf_type_vec2: return 2; + case cgltf_type_vec3: return 3; + case cgltf_type_vec4: return 4; + case cgltf_type_mat2: return 4; + case cgltf_type_mat3: return 9; + case cgltf_type_mat4: return 16; + default: return 0; + } +} + +static const char* cgltf_str_from_camera_type(cgltf_camera_type camera_type) +{ + switch (camera_type) + { + case cgltf_camera_type_perspective: return "perspective"; + case cgltf_camera_type_orthographic: return "orthographic"; + default: return NULL; + } +} + +static const char* cgltf_str_from_light_type(cgltf_light_type light_type) +{ + switch (light_type) + { + case cgltf_light_type_directional: return "directional"; + case cgltf_light_type_point: return "point"; + case cgltf_light_type_spot: return "spot"; + default: return NULL; + } +} + +static void cgltf_write_texture_transform(cgltf_write_context* context, const cgltf_texture_transform* transform) +{ + cgltf_write_line(context, "\"extensions\": {"); + cgltf_write_line(context, "\"KHR_texture_transform\": {"); + if (cgltf_check_floatarray(transform->offset, 2, 0.0f)) + { + cgltf_write_floatarrayprop(context, "offset", transform->offset, 2); + } + cgltf_write_floatprop(context, "rotation", transform->rotation, 0.0f); + if (cgltf_check_floatarray(transform->scale, 2, 1.0f)) + { + cgltf_write_floatarrayprop(context, "scale", transform->scale, 2); + } + cgltf_write_intprop(context, "texCoord", transform->texcoord, 0); + cgltf_write_line(context, "}"); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_asset(cgltf_write_context* context, const cgltf_asset* asset) +{ + cgltf_write_line(context, "\"asset\": {"); + cgltf_write_strprop(context, "copyright", asset->copyright); + cgltf_write_strprop(context, "generator", asset->generator); + cgltf_write_strprop(context, "version", asset->version); + cgltf_write_strprop(context, "min_version", asset->min_version); + cgltf_write_extras(context, &asset->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_primitive(cgltf_write_context* context, const cgltf_primitive* prim) +{ + cgltf_write_intprop(context, "mode", (int) prim->type, 4); + CGLTF_WRITE_IDXPROP("indices", prim->indices, context->data->accessors); + CGLTF_WRITE_IDXPROP("material", prim->material, context->data->materials); + cgltf_write_line(context, "\"attributes\": {"); + for (cgltf_size i = 0; i < prim->attributes_count; ++i) + { + const cgltf_attribute* attr = prim->attributes + i; + CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors); + } + cgltf_write_line(context, "}"); + + if (prim->targets_count) + { + cgltf_write_line(context, "\"targets\": ["); + for (cgltf_size i = 0; i < prim->targets_count; ++i) + { + cgltf_write_line(context, "{"); + for (cgltf_size j = 0; j < prim->targets[i].attributes_count; ++j) + { + const cgltf_attribute* attr = prim->targets[i].attributes + j; + CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors); + } + cgltf_write_line(context, "}"); + } + cgltf_write_line(context, "]"); + } + cgltf_write_extras(context, &prim->extras); + + cgltf_bool has_extensions = prim->has_draco_mesh_compression; + if (has_extensions) { + cgltf_write_line(context, "\"extensions\": {"); + + if (prim->has_draco_mesh_compression) { + context->extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION; + if (prim->attributes_count == 0 || prim->indices == 0) { + context->required_extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION; + } + + cgltf_write_line(context, "\"KHR_draco_mesh_compression\": {"); + CGLTF_WRITE_IDXPROP("bufferView", prim->draco_mesh_compression.buffer_view, context->data->buffer_views); + cgltf_write_line(context, "\"attributes\": {"); + for (cgltf_size i = 0; i < prim->draco_mesh_compression.attributes_count; ++i) + { + const cgltf_attribute* attr = prim->draco_mesh_compression.attributes + i; + CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors); + } + cgltf_write_line(context, "}"); + cgltf_write_line(context, "}"); + } + + cgltf_write_line(context, "}"); + } +} + +static void cgltf_write_mesh(cgltf_write_context* context, const cgltf_mesh* mesh) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "name", mesh->name); + + cgltf_write_line(context, "\"primitives\": ["); + for (cgltf_size i = 0; i < mesh->primitives_count; ++i) + { + cgltf_write_line(context, "{"); + cgltf_write_primitive(context, mesh->primitives + i); + cgltf_write_line(context, "}"); + } + cgltf_write_line(context, "]"); + + if (mesh->weights_count > 0) + { + cgltf_write_floatarrayprop(context, "weights", mesh->weights, mesh->weights_count); + } + cgltf_write_extras(context, &mesh->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_buffer_view(cgltf_write_context* context, const cgltf_buffer_view* view) +{ + cgltf_write_line(context, "{"); + CGLTF_WRITE_IDXPROP("buffer", view->buffer, context->data->buffers); + cgltf_write_intprop(context, "byteLength", (int)view->size, -1); + cgltf_write_intprop(context, "byteOffset", (int)view->offset, 0); + cgltf_write_intprop(context, "byteStride", (int)view->stride, 0); + // NOTE: We skip writing "target" because the spec says its usage can be inferred. + cgltf_write_extras(context, &view->extras); + cgltf_write_line(context, "}"); +} + + +static void cgltf_write_buffer(cgltf_write_context* context, const cgltf_buffer* buffer) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "uri", buffer->uri); + cgltf_write_intprop(context, "byteLength", (int)buffer->size, -1); + cgltf_write_extras(context, &buffer->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_material(cgltf_write_context* context, const cgltf_material* material) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "name", material->name); + cgltf_write_floatprop(context, "alphaCutoff", material->alpha_cutoff, 0.5f); + cgltf_write_boolprop_optional(context, "doubleSided", material->double_sided, false); + // cgltf_write_boolprop_optional(context, "unlit", material->unlit, false); + + if (material->unlit) + { + context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT; + } + + if (material->has_pbr_specular_glossiness) + { + context->extension_flags |= CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS; + } + + if (material->has_clearcoat) + { + context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT; + } + + if (material->has_transmission) + { + context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION; + } + + if (material->has_ior) + { + context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IOR; + } + + if (material->has_specular) + { + context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR; + } + + if (material->has_pbr_metallic_roughness) + { + const cgltf_pbr_metallic_roughness* params = &material->pbr_metallic_roughness; + cgltf_write_line(context, "\"pbrMetallicRoughness\": {"); + CGLTF_WRITE_TEXTURE_INFO("baseColorTexture", params->base_color_texture); + CGLTF_WRITE_TEXTURE_INFO("metallicRoughnessTexture", params->metallic_roughness_texture); + cgltf_write_floatprop(context, "metallicFactor", params->metallic_factor, 1.0f); + cgltf_write_floatprop(context, "roughnessFactor", params->roughness_factor, 1.0f); + if (cgltf_check_floatarray(params->base_color_factor, 4, 1.0f)) + { + cgltf_write_floatarrayprop(context, "baseColorFactor", params->base_color_factor, 4); + } + cgltf_write_extras(context, ¶ms->extras); + cgltf_write_line(context, "}"); + } + + if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission) + { + cgltf_write_line(context, "\"extensions\": {"); + if (material->has_clearcoat) + { + const cgltf_clearcoat* params = &material->clearcoat; + cgltf_write_line(context, "\"KHR_materials_clearcoat\": {"); + CGLTF_WRITE_TEXTURE_INFO("clearcoatTexture", params->clearcoat_texture); + CGLTF_WRITE_TEXTURE_INFO("clearcoatRoughnessTexture", params->clearcoat_roughness_texture); + CGLTF_WRITE_TEXTURE_INFO("clearcoatNormalTexture", params->clearcoat_normal_texture); + cgltf_write_floatprop(context, "clearcoatFactor", params->clearcoat_factor, 0.0f); + cgltf_write_floatprop(context, "clearcoatRoughnessFactor", params->clearcoat_roughness_factor, 0.0f); + cgltf_write_line(context, "}"); + } + if (material->has_ior) + { + const cgltf_ior* params = &material->ior; + cgltf_write_line(context, "\"KHR_materials_ior\": {"); + cgltf_write_floatprop(context, "ior", params->ior, 1.5f); + cgltf_write_line(context, "}"); + } + if (material->has_specular) + { + const cgltf_specular* params = &material->specular; + cgltf_write_line(context, "\"KHR_materials_specular\": {"); + CGLTF_WRITE_TEXTURE_INFO("specularTexture", params->specular_texture); + cgltf_write_floatprop(context, "specularFactor", params->specular_factor, 1.0f); + if (cgltf_check_floatarray(params->specular_color_factor, 3, 1.0f)) + { + cgltf_write_floatarrayprop(context, "specularColorFactor", params->specular_color_factor, 3); + } + cgltf_write_line(context, "}"); + } + if (material->has_transmission) + { + const cgltf_transmission* params = &material->transmission; + cgltf_write_line(context, "\"KHR_materials_transmission\": {"); + CGLTF_WRITE_TEXTURE_INFO("transmissionTexture", params->transmission_texture); + cgltf_write_floatprop(context, "transmissionFactor", params->transmission_factor, 0.0f); + cgltf_write_line(context, "}"); + } + if (material->has_pbr_specular_glossiness) + { + const cgltf_pbr_specular_glossiness* params = &material->pbr_specular_glossiness; + cgltf_write_line(context, "\"KHR_materials_pbrSpecularGlossiness\": {"); + CGLTF_WRITE_TEXTURE_INFO("diffuseTexture", params->diffuse_texture); + CGLTF_WRITE_TEXTURE_INFO("specularGlossinessTexture", params->specular_glossiness_texture); + if (cgltf_check_floatarray(params->diffuse_factor, 4, 1.0f)) + { + cgltf_write_floatarrayprop(context, "dffuseFactor", params->diffuse_factor, 4); + } + if (cgltf_check_floatarray(params->specular_factor, 3, 1.0f)) + { + cgltf_write_floatarrayprop(context, "specularFactor", params->specular_factor, 3); + } + cgltf_write_floatprop(context, "glossinessFactor", params->glossiness_factor, 1.0f); + cgltf_write_line(context, "}"); + } + if (material->unlit) + { + cgltf_write_line(context, "\"KHR_materials_unlit\": {}"); + } + cgltf_write_line(context, "}"); + } + + CGLTF_WRITE_TEXTURE_INFO("normalTexture", material->normal_texture); + CGLTF_WRITE_TEXTURE_INFO("occlusionTexture", material->occlusion_texture); + CGLTF_WRITE_TEXTURE_INFO("emissiveTexture", material->emissive_texture); + if (cgltf_check_floatarray(material->emissive_factor, 3, 0.0f)) + { + cgltf_write_floatarrayprop(context, "emissiveFactor", material->emissive_factor, 3); + } + cgltf_write_strprop(context, "alphaMode", cgltf_str_from_alpha_mode(material->alpha_mode)); + cgltf_write_extras(context, &material->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_image(cgltf_write_context* context, const cgltf_image* image) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "name", image->name); + cgltf_write_strprop(context, "uri", image->uri); + CGLTF_WRITE_IDXPROP("bufferView", image->buffer_view, context->data->buffer_views); + cgltf_write_strprop(context, "mimeType", image->mime_type); + cgltf_write_extras(context, &image->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_texture(cgltf_write_context* context, const cgltf_texture* texture) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "name", texture->name); + CGLTF_WRITE_IDXPROP("source", texture->image, context->data->images); + CGLTF_WRITE_IDXPROP("sampler", texture->sampler, context->data->samplers); + cgltf_write_extras(context, &texture->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_skin(cgltf_write_context* context, const cgltf_skin* skin) +{ + cgltf_write_line(context, "{"); + CGLTF_WRITE_IDXPROP("skeleton", skin->skeleton, context->data->nodes); + CGLTF_WRITE_IDXPROP("inverseBindMatrices", skin->inverse_bind_matrices, context->data->accessors); + CGLTF_WRITE_IDXARRPROP("joints", skin->joints_count, skin->joints, context->data->nodes); + cgltf_write_strprop(context, "name", skin->name); + cgltf_write_extras(context, &skin->extras); + cgltf_write_line(context, "}"); +} + +static const char* cgltf_write_str_path_type(cgltf_animation_path_type path_type) +{ + switch (path_type) + { + case cgltf_animation_path_type_translation: + return "translation"; + case cgltf_animation_path_type_rotation: + return "rotation"; + case cgltf_animation_path_type_scale: + return "scale"; + case cgltf_animation_path_type_weights: + return "weights"; + case cgltf_animation_path_type_invalid: + break; + } + return "invalid"; +} + +static const char* cgltf_write_str_interpolation_type(cgltf_interpolation_type interpolation_type) +{ + switch (interpolation_type) + { + case cgltf_interpolation_type_linear: + return "LINEAR"; + case cgltf_interpolation_type_step: + return "STEP"; + case cgltf_interpolation_type_cubic_spline: + return "CUBICSPLINE"; + } + return "invalid"; +} + +static void cgltf_write_path_type(cgltf_write_context* context, const char *label, cgltf_animation_path_type path_type) +{ + cgltf_write_strprop(context, label, cgltf_write_str_path_type(path_type)); +} + +static void cgltf_write_interpolation_type(cgltf_write_context* context, const char *label, cgltf_interpolation_type interpolation_type) +{ + cgltf_write_strprop(context, label, cgltf_write_str_interpolation_type(interpolation_type)); +} + +static void cgltf_write_animation_sampler(cgltf_write_context* context, const cgltf_animation_sampler* animation_sampler) +{ + cgltf_write_line(context, "{"); + cgltf_write_interpolation_type(context, "interpolation", animation_sampler->interpolation); + CGLTF_WRITE_IDXPROP("input", animation_sampler->input, context->data->accessors); + CGLTF_WRITE_IDXPROP("output", animation_sampler->output, context->data->accessors); + cgltf_write_extras(context, &animation_sampler->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_animation_channel(cgltf_write_context* context, const cgltf_animation* animation, const cgltf_animation_channel* animation_channel) +{ + cgltf_write_line(context, "{"); + CGLTF_WRITE_IDXPROP("sampler", animation_channel->sampler, animation->samplers); + cgltf_write_line(context, "\"target\": {"); + CGLTF_WRITE_IDXPROP("node", animation_channel->target_node, context->data->nodes); + cgltf_write_path_type(context, "path", animation_channel->target_path); + cgltf_write_line(context, "}"); + cgltf_write_extras(context, &animation_channel->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_animation(cgltf_write_context* context, const cgltf_animation* animation) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "name", animation->name); + + if (animation->samplers_count > 0) + { + cgltf_write_line(context, "\"samplers\": ["); + for (cgltf_size i = 0; i < animation->samplers_count; ++i) + { + cgltf_write_animation_sampler(context, animation->samplers + i); + } + cgltf_write_line(context, "]"); + } + if (animation->channels_count > 0) + { + cgltf_write_line(context, "\"channels\": ["); + for (cgltf_size i = 0; i < animation->channels_count; ++i) + { + cgltf_write_animation_channel(context, animation, animation->channels + i); + } + cgltf_write_line(context, "]"); + } + cgltf_write_extras(context, &animation->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_sampler(cgltf_write_context* context, const cgltf_sampler* sampler) +{ + cgltf_write_line(context, "{"); + cgltf_write_intprop(context, "magFilter", sampler->mag_filter, 0); + cgltf_write_intprop(context, "minFilter", sampler->min_filter, 0); + cgltf_write_intprop(context, "wrapS", sampler->wrap_s, 10497); + cgltf_write_intprop(context, "wrapT", sampler->wrap_t, 10497); + cgltf_write_extras(context, &sampler->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_node(cgltf_write_context* context, const cgltf_node* node) +{ + cgltf_write_line(context, "{"); + CGLTF_WRITE_IDXARRPROP("children", node->children_count, node->children, context->data->nodes); + CGLTF_WRITE_IDXPROP("mesh", node->mesh, context->data->meshes); + cgltf_write_strprop(context, "name", node->name); + if (node->has_matrix) + { + cgltf_write_floatarrayprop(context, "matrix", node->matrix, 16); + } + if (node->has_translation) + { + cgltf_write_floatarrayprop(context, "translation", node->translation, 3); + } + if (node->has_rotation) + { + cgltf_write_floatarrayprop(context, "rotation", node->rotation, 4); + } + if (node->has_scale) + { + cgltf_write_floatarrayprop(context, "scale", node->scale, 3); + } + if (node->skin) + { + CGLTF_WRITE_IDXPROP("skin", node->skin, context->data->skins); + } + + if (node->light) + { + context->extension_flags |= CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL; + cgltf_write_line(context, "\"extensions\": {"); + cgltf_write_line(context, "\"KHR_lights_punctual\": {"); + CGLTF_WRITE_IDXPROP("light", node->light, context->data->lights); + cgltf_write_line(context, "}"); + cgltf_write_line(context, "}"); + } + + if (node->weights_count > 0) + { + cgltf_write_floatarrayprop(context, "weights", node->weights, node->weights_count); + } + + if (node->camera) + { + CGLTF_WRITE_IDXPROP("camera", node->camera, context->data->cameras); + } + + cgltf_write_extras(context, &node->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_scene(cgltf_write_context* context, const cgltf_scene* scene) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "name", scene->name); + CGLTF_WRITE_IDXARRPROP("nodes", scene->nodes_count, scene->nodes, context->data->nodes); + cgltf_write_extras(context, &scene->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_accessor(cgltf_write_context* context, const cgltf_accessor* accessor) +{ + cgltf_write_line(context, "{"); + CGLTF_WRITE_IDXPROP("bufferView", accessor->buffer_view, context->data->buffer_views); + cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->component_type), 0); + cgltf_write_strprop(context, "type", cgltf_str_from_type(accessor->type)); + cgltf_size dim = cgltf_dim_from_type(accessor->type); + cgltf_write_boolprop_optional(context, "normalized", accessor->normalized, false); + cgltf_write_intprop(context, "byteOffset", (int)accessor->offset, 0); + cgltf_write_intprop(context, "count", (int)accessor->count, -1); + if (accessor->has_min) + { + cgltf_write_floatarrayprop(context, "min", accessor->min, dim); + } + if (accessor->has_max) + { + cgltf_write_floatarrayprop(context, "max", accessor->max, dim); + } + if (accessor->is_sparse) + { + cgltf_write_line(context, "\"sparse\": {"); + cgltf_write_intprop(context, "count", (int)accessor->sparse.count, 0); + cgltf_write_line(context, "\"indices\": {"); + cgltf_write_intprop(context, "byteOffset", (int)accessor->sparse.indices_byte_offset, 0); + CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.indices_buffer_view, context->data->buffer_views); + cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->sparse.indices_component_type), 0); + cgltf_write_extras(context, &accessor->sparse.indices_extras); + cgltf_write_line(context, "}"); + cgltf_write_line(context, "\"values\": {"); + cgltf_write_intprop(context, "byteOffset", (int)accessor->sparse.values_byte_offset, 0); + CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.values_buffer_view, context->data->buffer_views); + cgltf_write_extras(context, &accessor->sparse.values_extras); + cgltf_write_line(context, "}"); + cgltf_write_extras(context, &accessor->sparse.extras); + cgltf_write_line(context, "}"); + } + cgltf_write_extras(context, &accessor->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_camera(cgltf_write_context* context, const cgltf_camera* camera) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "type", cgltf_str_from_camera_type(camera->type)); + if (camera->name) + { + cgltf_write_strprop(context, "name", camera->name); + } + + if (camera->type == cgltf_camera_type_orthographic) + { + cgltf_write_line(context, "\"orthographic\": {"); + cgltf_write_floatprop(context, "xmag", camera->data.orthographic.xmag, -1.0f); + cgltf_write_floatprop(context, "ymag", camera->data.orthographic.ymag, -1.0f); + cgltf_write_floatprop(context, "zfar", camera->data.orthographic.zfar, -1.0f); + cgltf_write_floatprop(context, "znear", camera->data.orthographic.znear, -1.0f); + cgltf_write_extras(context, &camera->data.orthographic.extras); + cgltf_write_line(context, "}"); + } + else if (camera->type == cgltf_camera_type_perspective) + { + cgltf_write_line(context, "\"perspective\": {"); + cgltf_write_floatprop(context, "aspectRatio", camera->data.perspective.aspect_ratio, -1.0f); + cgltf_write_floatprop(context, "yfov", camera->data.perspective.yfov, -1.0f); + cgltf_write_floatprop(context, "zfar", camera->data.perspective.zfar, -1.0f); + cgltf_write_floatprop(context, "znear", camera->data.perspective.znear, -1.0f); + cgltf_write_extras(context, &camera->data.perspective.extras); + cgltf_write_line(context, "}"); + } + cgltf_write_extras(context, &camera->extras); + cgltf_write_line(context, "}"); +} + +static void cgltf_write_light(cgltf_write_context* context, const cgltf_light* light) +{ + cgltf_write_line(context, "{"); + cgltf_write_strprop(context, "type", cgltf_str_from_light_type(light->type)); + if (light->name) + { + cgltf_write_strprop(context, "name", light->name); + } + if (cgltf_check_floatarray(light->color, 3, 1.0f)) + { + cgltf_write_floatarrayprop(context, "color", light->color, 3); + } + cgltf_write_floatprop(context, "intensity", light->intensity, 1.0f); + cgltf_write_floatprop(context, "range", light->range, 0.0f); + + if (light->type == cgltf_light_type_spot) + { + cgltf_write_line(context, "\"spot\": {"); + cgltf_write_floatprop(context, "innerConeAngle", light->spot_inner_cone_angle, 0.0f); + cgltf_write_floatprop(context, "outerConeAngle", light->spot_outer_cone_angle, 3.14159265358979323846f/4.0f); + cgltf_write_line(context, "}"); + } + cgltf_write_line(context, "}"); +} + +cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data) +{ + cgltf_size expected = cgltf_write(options, NULL, 0, data); + char* buffer = (char*) malloc(expected); + cgltf_size actual = cgltf_write(options, buffer, expected, data); + if (expected != actual) { + fprintf(stderr, "Error: expected %zu bytes but wrote %zu bytes.\n", expected, actual); + } + FILE* file = fopen(path, "wt"); + if (!file) + { + return cgltf_result_file_not_found; + } + // Note that cgltf_write() includes a null terminator, which we omit from the file content. + fwrite(buffer, actual - 1, 1, file); + fclose(file); + free(buffer); + return cgltf_result_success; +} + +static void cgltf_write_extensions(cgltf_write_context* context, uint32_t extension_flags) +{ + if (extension_flags & CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM) { + cgltf_write_stritem(context, "KHR_texture_transform"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT) { + cgltf_write_stritem(context, "KHR_materials_unlit"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS) { + cgltf_write_stritem(context, "KHR_materials_pbrSpecularGlossiness"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL) { + cgltf_write_stritem(context, "KHR_lights_punctual"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION) { + cgltf_write_stritem(context, "KHR_draco_mesh_compression"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT) { + cgltf_write_stritem(context, "KHR_materials_clearcoat"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IOR) { + cgltf_write_stritem(context, "KHR_materials_ior"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR) { + cgltf_write_stritem(context, "KHR_materials_specular"); + } + if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION) { + cgltf_write_stritem(context, "KHR_materials_transmission"); + } +} + +cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data) +{ + (void)options; + cgltf_write_context ctx; + ctx.buffer = buffer; + ctx.buffer_size = size; + ctx.remaining = size; + ctx.cursor = buffer; + ctx.chars_written = 0; + ctx.data = data; + ctx.depth = 1; + ctx.indent = " "; + ctx.needs_comma = 0; + ctx.extension_flags = 0; + ctx.required_extension_flags = 0; + + cgltf_write_context* context = &ctx; + + CGLTF_SPRINTF("{"); + + if (data->accessors_count > 0) + { + cgltf_write_line(context, "\"accessors\": ["); + for (cgltf_size i = 0; i < data->accessors_count; ++i) + { + cgltf_write_accessor(context, data->accessors + i); + } + cgltf_write_line(context, "]"); + } + + cgltf_write_asset(context, &data->asset); + + if (data->buffer_views_count > 0) + { + cgltf_write_line(context, "\"bufferViews\": ["); + for (cgltf_size i = 0; i < data->buffer_views_count; ++i) + { + cgltf_write_buffer_view(context, data->buffer_views + i); + } + cgltf_write_line(context, "]"); + } + + if (data->buffers_count > 0) + { + cgltf_write_line(context, "\"buffers\": ["); + for (cgltf_size i = 0; i < data->buffers_count; ++i) + { + cgltf_write_buffer(context, data->buffers + i); + } + cgltf_write_line(context, "]"); + } + + if (data->images_count > 0) + { + cgltf_write_line(context, "\"images\": ["); + for (cgltf_size i = 0; i < data->images_count; ++i) + { + cgltf_write_image(context, data->images + i); + } + cgltf_write_line(context, "]"); + } + + if (data->meshes_count > 0) + { + cgltf_write_line(context, "\"meshes\": ["); + for (cgltf_size i = 0; i < data->meshes_count; ++i) + { + cgltf_write_mesh(context, data->meshes + i); + } + cgltf_write_line(context, "]"); + } + + if (data->materials_count > 0) + { + cgltf_write_line(context, "\"materials\": ["); + for (cgltf_size i = 0; i < data->materials_count; ++i) + { + cgltf_write_material(context, data->materials + i); + } + cgltf_write_line(context, "]"); + } + + if (data->nodes_count > 0) + { + cgltf_write_line(context, "\"nodes\": ["); + for (cgltf_size i = 0; i < data->nodes_count; ++i) + { + cgltf_write_node(context, data->nodes + i); + } + cgltf_write_line(context, "]"); + } + + if (data->samplers_count > 0) + { + cgltf_write_line(context, "\"samplers\": ["); + for (cgltf_size i = 0; i < data->samplers_count; ++i) + { + cgltf_write_sampler(context, data->samplers + i); + } + cgltf_write_line(context, "]"); + } + + CGLTF_WRITE_IDXPROP("scene", data->scene, data->scenes); + + if (data->scenes_count > 0) + { + cgltf_write_line(context, "\"scenes\": ["); + for (cgltf_size i = 0; i < data->scenes_count; ++i) + { + cgltf_write_scene(context, data->scenes + i); + } + cgltf_write_line(context, "]"); + } + + if (data->textures_count > 0) + { + cgltf_write_line(context, "\"textures\": ["); + for (cgltf_size i = 0; i < data->textures_count; ++i) + { + cgltf_write_texture(context, data->textures + i); + } + cgltf_write_line(context, "]"); + } + + if (data->skins_count > 0) + { + cgltf_write_line(context, "\"skins\": ["); + for (cgltf_size i = 0; i < data->skins_count; ++i) + { + cgltf_write_skin(context, data->skins + i); + } + cgltf_write_line(context, "]"); + } + + if (data->animations_count > 0) + { + cgltf_write_line(context, "\"animations\": ["); + for (cgltf_size i = 0; i < data->animations_count; ++i) + { + cgltf_write_animation(context, data->animations + i); + } + cgltf_write_line(context, "]"); + } + + if (data->cameras_count > 0) + { + cgltf_write_line(context, "\"cameras\": ["); + for (cgltf_size i = 0; i < data->cameras_count; ++i) + { + cgltf_write_camera(context, data->cameras + i); + } + cgltf_write_line(context, "]"); + } + + if (data->lights_count > 0) + { + cgltf_write_line(context, "\"extensions\": {"); + + cgltf_write_line(context, "\"KHR_lights_punctual\": {"); + cgltf_write_line(context, "\"lights\": ["); + for (cgltf_size i = 0; i < data->lights_count; ++i) + { + cgltf_write_light(context, data->lights + i); + } + cgltf_write_line(context, "]"); + cgltf_write_line(context, "}"); + + cgltf_write_line(context, "}"); + } + + if (context->extension_flags != 0) { + cgltf_write_line(context, "\"extensionsUsed\": ["); + cgltf_write_extensions(context, context->extension_flags); + cgltf_write_line(context, "]"); + } + + if (context->required_extension_flags != 0) { + cgltf_write_line(context, "\"extensionsRequired\": ["); + cgltf_write_extensions(context, context->required_extension_flags); + cgltf_write_line(context, "]"); + } + + cgltf_write_extras(context, &data->extras); + + CGLTF_SPRINTF("\n}\n"); + + // snprintf does not include the null terminator in its return value, so be sure to include it + // in the returned byte count. + return 1 + ctx.chars_written; +} + +#endif /* #ifdef CGLTF_WRITE_IMPLEMENTATION */ + +/* cgltf is distributed under MIT license: + * + * Copyright (c) 2019 Philip Rideout + + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ -- cgit v1.2.3