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cOMS/object/Object.h

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/**
* Jingga
*
* @copyright Jingga
* @license OMS License 2.0
* @version 1.0.0
* @link https://jingga.app
*/
#ifndef TOS_OBJECT_H
#define TOS_OBJECT_H
#include "../stdlib/Types.h"
#include "../memory/RingMemory.h"
#include "../utils/EndianUtils.h"
#include "Vertex.h"
#if _WIN32
#include "../platform/win32/UtilsWin32.h"
#else
#include "../platform/linux/UtilsLinux.h"
#endif
#include "Mesh.h"
#include "../stdlib/simd/SIMD_I32.h"
#define MESH_VERSION 1
// @todo The name Object.h is stupid, copy content to Mesh.h
// @todo also handle textures etc.
// WARNING: mesh needs to have memory already reserved and asigned to data
void object_from_file_txt(
RingMemory* ring,
const char* path,
Mesh* mesh
)
{
FileBody file;
file_read(path, &file, ring);
char* pos = (char *) file.content;
mesh->version = strtol(pos, &pos, 10); ++pos;
int32 object_index = 0;
int32 group_index = 0;
mesh->vertices = (f32 *) mesh->data;
mesh->vertex_count = 0;
mesh->normal_count = 0;
mesh->tex_coord_count = 0;
mesh->color_count = 0;
mesh->face_count = 0;
mesh->face_normal_count = 0;
mesh->face_tex_coord_count = 0;
mesh->face_color_count = 0;
uint32 temp_color_count = 0;
while (*pos != '\0') {
while (*pos == ' ' || *pos == '\t' || *pos == '\n') {
++pos;
}
if (*pos == '\0') {
break;
}
// Parse type
// WARNING: The code below could fail if [1] is outside of range
// However that should never happen for well formed files
int32 state = 0;
if (*pos == 'v' && pos[1] == ' ') {
state = 1;
} else if (*pos == 'v' && pos[1] == 'n') {
state = 2;
} else if (*pos == 'v' && pos[1] == 't') {
state = 3;
} else if (*pos == 'v' && pos[1] == 'p') {
state = 4;
} else if (*pos == 'o' && pos[1] == ' ') {
state = 5;
} else if (*pos == 's' && pos[1] == ' ') {
state = 6;
} else if (*pos == 'f' && pos[1] == ' ') {
state = 7;
} else if (*pos == 'g' && pos[1] == ' ') {
state = 8;
} else if (*pos == 'l' && pos[1] == ' ') {
state = 9;
} else if (*pos == 'm' && pos[1] == 't') {
state = 10;
} else if (*pos == 'h' && pos[1] == 'i') {
state = 11;
} else if (*pos == 'a' && pos[1] == 'n') {
state = 12;
} else if (*pos == 'u' && pos[3] == 'm') {
state = 13;
} else if (*pos == 'u' && pos[3] == 'h') {
state = 14;
} else {
// not supported or comment
while (*pos != '\n' && *pos != '\0') {
++pos;
}
}
// move past keyword
while (*pos != ' ' && *pos != '\n' && *pos != '\0') {
++pos;
}
// move past whitespaces and newline
bool is_next_line = false;
while (*pos == ' ' || *pos == '\n') {
is_next_line |= *pos == '\n';
++pos;
}
if (*pos == '\0' || is_next_line) {
continue;
}
// NOTE: we always load a file in the format: POSITON + NORMAL + TEXTURE + COLOR
// EVEN if some of the data is missing. This is necessary to keep the memory kinda in line.
// The actual binary file later will have the minimized layout.
// handle data types
switch (state) {
case 0: break;
case 1: {
// 'v'
if (mesh->vertex_count == 0) {
mesh->vertex_type |= VERTEX_TYPE_POSITION;
}
mesh->vertices[mesh->vertex_count * 3] = strtof(pos, &pos); ++pos;
mesh->vertices[mesh->vertex_count * 3 + 1] = strtof(pos, &pos); ++pos;
mesh->vertices[mesh->vertex_count * 3 + 2] = strtof(pos, &pos); ++pos;
// has color information
// @todo Move to own case statement // 'co'
if (*pos != '\n' && pos[1] != ' ' && pos[1] != '\n') {
if (mesh->vertex_count == 0) {
mesh->vertex_type |= VERTEX_TYPE_COLOR;
}
mesh->vertices[mesh->vertex_count * 12 + 8] = strtof(pos, &pos); ++pos;
mesh->vertices[mesh->vertex_count * 12 + 9] = strtof(pos, &pos); ++pos;
mesh->vertices[mesh->vertex_count * 12 + 10] = strtof(pos, &pos); ++pos;
// handle optional alpha [a]
if (*pos != '\n' && pos[1] != ' ' && pos[1] != '\n') {
mesh->vertices[mesh->vertex_count * 12 + 11] = strtof(pos, &pos); ++pos;
} else {
mesh->vertices[mesh->vertex_count * 12 + 11] = 1.0f;
}
++temp_color_count;
}
++mesh->vertex_count;
} break;
case 2: {
// 'vn'
// @bug This requires normals to be defined before textures
if (mesh->normal_count == 0) {
mesh->normals = mesh->vertices + mesh->vertex_count * 3;
}
mesh->normals[mesh->normal_count * 3] = strtof(pos, &pos); ++pos;
mesh->normals[mesh->normal_count * 3 + 1] = strtof(pos, &pos); ++pos;
mesh->normals[mesh->normal_count * 3 + 2] = strtof(pos, &pos); ++pos;
++mesh->normal_count;
} break;
case 3: {
// 'vt'
if (mesh->tex_coord_count == 0) {
mesh->tex_coords = mesh->vertices + mesh->vertex_count * 3 + mesh->normal_count * 3;
}
mesh->tex_coords[mesh->tex_coord_count * 2] = strtof(pos, &pos); ++pos;
mesh->tex_coords[mesh->tex_coord_count * 2 + 1] = strtof(pos, &pos); ++pos;
++mesh->tex_coord_count;
} break;
case 4: {
// 'vp'
strtof(pos, &pos); ++pos;
// handle optional [v]
if (*pos != '\n' && pos[1] != ' ' && pos[1] != '\n') {
strtof(pos, &pos); ++pos;
// handle optional [w]
if (*pos != '\n' && pos[1] != ' ' && pos[1] != '\n') {
strtof(pos, &pos); ++pos;
}
}
} break;
case 5: {
// 'o'
char text[100];
int32 i = 0;
while (*pos != '\0' && *pos != ' ') {
text[i++] = *pos++;
}
text[i] = '\0';
++object_index;
} break;
case 6: {
// 's'
strtol(pos, &pos, 10); ++pos;
} break;
case 7: {
// 'f'
if (mesh->face_count == 0) {
mesh->faces = (uint32 *) (mesh->vertices + mesh->vertex_count * 3 + mesh->normal_count * 3 + mesh->tex_coord_count * 2 + mesh->color_count * 4);
}
int32 ftype = 0;
char* tmp = pos;
while (*tmp != ' ') {
if (*tmp++ == '/') {
++ftype;
if (*tmp++ == '/') {
ftype = 3;
break;
}
}
}
const int32 max_blocks = 3; // @todo this could actually be N. Might have to change in the future
int32 block = 0;
while (*pos != '\0' && *pos != '\n') {
if (ftype == 0) {
// v1 v2 v3 ...
if (mesh->face_count == 0) {
mesh->face_type = FACE_TYPE_VERTICES;
}
mesh->faces[(mesh->face_count * max_blocks * 1) + block] = strtol(pos, &pos, 10) - 1; ++pos;
} else if (ftype == 1) {
// v1/vt1 v2/vt2 v3/vt3 ...
if (mesh->face_count == 0) {
mesh->face_type = FACE_TYPE_VERTICES | FACE_TYPE_TEXTURES;
}
mesh->faces[(mesh->face_count * max_blocks * 2) + block * 2] = strtol(pos, &pos, 10) - 1; ++pos;
mesh->faces[(mesh->face_count * max_blocks * 2) + block * 2 + 1] = strtol(pos, &pos, 10) - 1; ++pos;
} else if (ftype == 2) {
// v1/vt1/vn1 v2/vt2/vn2 v3/vt3/vn3 ...
if (mesh->face_count == 0) {
mesh->face_type = FACE_TYPE_VERTICES | FACE_TYPE_TEXTURES | FACE_TYPE_NORMALS;
}
mesh->faces[(mesh->face_count * max_blocks * 3) + block * 3] = strtol(pos, &pos, 10) - 1; ++pos;
mesh->faces[(mesh->face_count * max_blocks * 3) + block * 3 + 1] = strtol(pos, &pos, 10) - 1; ++pos;
mesh->faces[(mesh->face_count * max_blocks * 3) + block * 3 + 2] = strtol(pos, &pos, 10) - 1; ++pos;
} else if (ftype == 3) {
// v1//vn1 v2//vn2 v3//vn3 ...
if (mesh->face_count == 0) {
mesh->face_type = FACE_TYPE_VERTICES | FACE_TYPE_NORMALS;
}
mesh->faces[(mesh->face_count * max_blocks * 2) + block * 2] = strtol(pos, &pos, 10) - 1; ++pos;
++pos;
mesh->faces[(mesh->face_count * max_blocks * 2) + block * 2 + 1] = strtol(pos, &pos, 10) - 1; ++pos;
}
++block;
}
++mesh->face_count;
} break;
case 8: {
// 'g'
char text[100];
int32 i = 0;
while (*pos != '\0' && *pos != ' ') {
text[i++] = *pos++;
}
text[i] = '\0';
++group_index;
} break;
case 9: {
//l
while (*pos != '\0' && *pos != '\n') {
strtol(pos, &pos, 10); ++pos;
}
} break;
case 10: {
// 'mtllib'
char text[100];
int32 i = 0;
while (*pos != '\0' && *pos != ' ') {
text[i++] = *pos++;
}
text[i] = '\0';
} break;
case 11: {
// 'hitlib'
char text[100];
int32 i = 0;
while (*pos != '\0' && *pos != ' ') {
text[i++] = *pos++;
}
text[i] = '\0';
} break;
case 12: {
// 'anilib'
char text[100];
int32 i = 0;
while (*pos != '\0' && *pos != ' ') {
text[i++] = *pos++;
}
text[i] = '\0';
} break;
case 13: {
// 'usemtl'
char text[100];
int32 i = 0;
while (*pos != '\0' && *pos != ' ') {
text[i++] = *pos++;
}
text[i] = '\0';
} break;
case 14: {
// 'usehit'
char text[100];
int32 i = 0;
while (*pos != '\0' && *pos != ' ') {
text[i++] = *pos++;
}
text[i] = '\0';
} break;
}
}
}
enum ObjectLoadingRestriction {
OBJECT_LOADING_RESTRICTION_POSITION = 1,
OBJECT_LOADING_RESTRICTION_NORMAL = 2,
OBJECT_LOADING_RESTRICTION_TEXTURE = 4,
OBJECT_LOADING_RESTRICTION_COLOR = 8,
OBJECT_LOADING_RESTRICTION_FACES = 16,
OBJECT_LOADING_RESTRICTION_EVERYTHING = 31
};
// @todo sometimes we don't care about some data, we should have an option which defines which data should be loaded
// this can improve performance for algorithms on this. e.g.:
// on the server side we only care about the vertex positions for collision (no normals, no color, ...)
int32 object_from_file(
RingMemory* ring,
const char* path,
Mesh* mesh,
const char* group = NULL,
int32 load_format = OBJECT_LOADING_RESTRICTION_EVERYTHING,
int32 size = 8
)
{
FileBody file;
file_read(path, &file, ring);
byte* pos = file.content;
// Read version
mesh->version = *((int32 *) pos);
pos += sizeof(mesh->version);
// Read base data
mesh->vertex_type = *((int32 *) pos);
pos += sizeof(mesh->vertex_type);
mesh->vertex_count = *((int32 *) pos);
pos += sizeof(mesh->vertex_count);
mesh->normal_count = *((int32 *) pos);
pos += sizeof(mesh->normal_count);
mesh->tex_coord_count = *((int32 *) pos);
pos += sizeof(mesh->tex_coord_count);
mesh->color_count = *((int32 *) pos);
pos += sizeof(mesh->color_count);
#if !_WIN32 && !__LITTLE_ENDIAN
mesh->version = endian_swap(mesh->version);
mesh->vertex_type = endian_swap(mesh->vertex_type);
mesh->verted_count = endian_swap(mesh->verted_count);
mesh->normal_count = endian_swap(mesh->normal_count);
mesh->tex_coord_count = endian_swap(mesh->tex_coord_count);
mesh->color_count = endian_swap(mesh->color_count);
#endif
int32 vertex_size = 0;
if (mesh->vertex_type & VERTEX_TYPE_POSITION) {
vertex_size += 3;
}
if (mesh->vertex_type & VERTEX_TYPE_NORMAL) {
vertex_size += 3;
}
if (mesh->vertex_type & VERTEX_TYPE_TEXTURE_COORD) {
vertex_size += 2;
}
if (mesh->vertex_type & VERTEX_TYPE_COLOR) {
vertex_size += 4;
}
int32 offset = 0;
if (mesh->vertex_count > 0) {
memcpy(mesh->data, pos, sizeof(f32) * vertex_size * mesh->vertex_count);
mesh->vertices = (f32 *) mesh->data;
pos += sizeof(f32) * vertex_size * mesh->vertex_count;
offset += sizeof(f32) * vertex_size * mesh->vertex_count;
}
if (mesh->normal_count > 0) {
memcpy(mesh->data + offset, pos, sizeof(f32) * 3 * mesh->normal_count);
mesh->normals = (f32 *) (mesh->data + offset);
pos += sizeof(f32) * 3 * mesh->normal_count;
offset += sizeof(f32) * 3 * mesh->normal_count;
}
if (mesh->tex_coord_count > 0) {
memcpy(mesh->data + offset, pos, sizeof(f32) * 3 * mesh->tex_coord_count);
mesh->tex_coords = (f32 *) (mesh->data + offset);
pos += sizeof(f32) * 2 * mesh->tex_coord_count;
offset += sizeof(f32) * 2 * mesh->tex_coord_count;
}
if (mesh->color_count > 0) {
memcpy(mesh->data + offset, pos, sizeof(f32) * 4 * mesh->color_count);
mesh->colors = (f32 *) (mesh->data + offset);
pos += sizeof(f32) * 4 * mesh->color_count;
offset += sizeof(f32) * 4 * mesh->color_count;
}
// Read face data
mesh->face_type = *((int32 *) pos);
pos += sizeof(mesh->face_type);
mesh->face_count = *((int32 *) pos);
pos += sizeof(mesh->face_count);
mesh->face_normal_count = *((int32 *) pos);
pos += sizeof(mesh->face_normal_count);
mesh->face_tex_coord_count = *((int32 *) pos);
pos += sizeof(mesh->face_tex_coord_count);
mesh->face_color_count = *((int32 *) pos);
pos += sizeof(mesh->face_color_count);
#if !_WIN32 && !__LITTLE_ENDIAN
mesh->face_type = endian_swap(mesh->face_type);
mesh->face_count = endian_swap(mesh->face_count);
mesh->face_normal_count = endian_swap(mesh->face_normal_count);
mesh->face_tex_coord_count = endian_swap(mesh->face_tex_coord_count);
mesh->face_color_count = endian_swap(mesh->face_color_count);
#endif
int32 face_size = 0;
if (mesh->face_type & FACE_TYPE_VERTICES) {
face_size += 3;
}
if ((mesh->face_type & FACE_TYPE_NORMALS)) {
face_size += 3;
}
if ((mesh->face_type & FACE_TYPE_TEXTURES)) {
face_size += 3;
}
if ((mesh->face_type & FACE_TYPE_COLORS)) {
face_size += 3;
}
// faces can be either in the form
// f: v/vt/vn ...
// or:
// f: v ...
// f: vn ...
// f: vt ...
if (mesh->face_count > 0) {
memcpy(mesh->data + offset, pos, sizeof(uint32) * face_size * mesh->face_count);
mesh->faces = (uint32 *) (mesh->data + offset);
pos += sizeof(uint32) * face_size * mesh->face_count;
offset += sizeof(uint32) * face_size * mesh->face_count;
}
if (mesh->face_normal_count > 0) {
memcpy(mesh->data + offset, pos, sizeof(uint32) * 3 * mesh->face_normal_count);
mesh->face_normals = (uint32 *) (mesh->data + offset);
pos += sizeof(uint32) * 3 * mesh->face_normal_count;
offset += sizeof(uint32) * 3 * mesh->face_normal_count;
}
if (mesh->face_tex_coord_count > 0) {
memcpy(mesh->data + offset, pos, sizeof(uint32) * 3 * mesh->face_tex_coord_count);
mesh->face_textures = (uint32 *) (mesh->data + offset);
pos += sizeof(uint32) * 3 * mesh->face_tex_coord_count;
offset += sizeof(uint32) * 3 * mesh->face_tex_coord_count;
}
if (mesh->face_color_count > 0) {
memcpy(mesh->data + offset, pos, sizeof(uint32) * 3 * mesh->face_color_count);
mesh->face_colors = (uint32 *) (mesh->data + offset);
pos += sizeof(uint32) * 3 * mesh->face_color_count;
offset += sizeof(uint32) * 3 * mesh->face_color_count;
}
SWAP_ENDIAN_LITTLE_SIMD(
(int32 *) mesh->data,
(int32 *) mesh->data,
offset / 4, // everything is 4 bytes -> super easy to swap
steps
);
return offset;
}
void object_to_file(
RingMemory* ring,
const char* path,
const Mesh* mesh,
int32 vertex_save_format = VERTEX_TYPE_POSITION,
int32 face_save_format = FACE_TYPE_VERTICES,
int32 size = 8
)
{
FileBody file;
// Temporary file size for buffer
// @todo check the actual size, we are currently more or less guessing
file.size = sizeof(mesh)
+ sizeof(Vertex3D) * mesh->vertex_count
+ sizeof(f32) * 12 * mesh->vertex_count
+ 4096;
file.content = ring_get_memory(ring, file.size, 64);
byte* pos = file.content;
// version
memcpy(pos, &mesh->version, sizeof(mesh->version));
pos += sizeof(mesh->version);
// vertices
memcpy(pos, &vertex_save_format, sizeof(vertex_save_format));
pos += sizeof(vertex_save_format);
memcpy(pos, &mesh->vertex_count, sizeof(mesh->vertex_count));
pos += sizeof(mesh->vertex_count);
// We are can save the mesh in a different format from the current format -> need to adjust some values
uint32 normal_count = mesh->normal_count == 0 && (mesh->vertex_type & VERTEX_TYPE_NORMAL)
? mesh->vertex_count
: mesh->normal_count;
memcpy(pos, &normal_count, sizeof(mesh->normal_count));
pos += sizeof(mesh->normal_count);
uint32 tex_coord_count = mesh->tex_coord_count == 0 && (mesh->vertex_type & VERTEX_TYPE_TEXTURE_COORD)
? mesh->vertex_count
: mesh->tex_coord_count;
memcpy(pos, &tex_coord_count, sizeof(mesh->tex_coord_count));
pos += sizeof(mesh->tex_coord_count);
uint32 color_count = mesh->color_count == 0 && (mesh->vertex_type & VERTEX_TYPE_COLOR)
? mesh->vertex_count
: mesh->color_count;
memcpy(pos, &color_count, sizeof(mesh->color_count));
pos += sizeof(mesh->color_count);
// verticies
if (mesh->vertex_count > 0) {
int32 vertex_size = 0;
if (mesh->vertex_type & VERTEX_TYPE_POSITION) {
vertex_size += 3;
}
if (mesh->vertex_type & VERTEX_TYPE_NORMAL) {
vertex_size += 3;
}
if (mesh->vertex_type & VERTEX_TYPE_TEXTURE_COORD) {
vertex_size += 2;
}
if (mesh->vertex_type & VERTEX_TYPE_COLOR) {
vertex_size += 4;
}
int32 out_vertex_size = 0;
if (vertex_save_format & VERTEX_TYPE_POSITION) {
out_vertex_size += 3;
}
if (vertex_save_format & VERTEX_TYPE_NORMAL) {
out_vertex_size += 3;
}
if (vertex_save_format & VERTEX_TYPE_TEXTURE_COORD) {
out_vertex_size += 2;
}
if (vertex_save_format & VERTEX_TYPE_COLOR) {
out_vertex_size += 4;
}
if ((mesh->vertex_type == VERTEX_TYPE_ALL && vertex_save_format == VERTEX_TYPE_ALL)
|| (mesh->vertex_type == VERTEX_TYPE_POSITION && vertex_save_format == VERTEX_TYPE_POSITION)
) {
// data is the same as in the array
memcpy(pos, mesh->vertices, vertex_size * sizeof(f32) * mesh->vertex_count);
pos += vertex_size * sizeof(f32) * mesh->vertex_count;
} else {
f32* temp = mesh->vertices;
f32* end = mesh->vertices + mesh->vertex_count * vertex_size;
int32 offset;
byte* vertice_start = pos;
// @bug index gets increased every iteration BUT different groups and objects in the source may have different data
// This comes again down to how to handle hierarchal data with multiple groups and objects
int32 index = 0;
// iterate over all vertices to create new output format
while (temp < end) {
// @question why do I even need offset? couldn't I just directly manipulate temp?
offset = 0;
// First we save everything in one large array if that is the setting
if (vertex_save_format & VERTEX_TYPE_POSITION) {
if (mesh->vertex_type & VERTEX_TYPE_POSITION) {
memcpy(pos, temp, sizeof(f32) * 3);
pos += sizeof(f32) * 3;
offset += 3;
} else {
memset(pos, 0, sizeof(f32) * 3);
pos += sizeof(f32) * 3;
}
}
// We want separate arrays for some data
if ((mesh->vertex_type & VERTEX_TYPE_NORMAL) && !(vertex_save_format & VERTEX_TYPE_NORMAL)) {
// go to end of vertices * shift by previous array sizes + shift by current vertex -> creates one continous array with this data
memcpy(vertice_start
+ sizeof(f32) * out_vertex_size * mesh->vertex_count
+ index * sizeof(f32) * 3, temp + offset, sizeof(f32) * 3);
offset += 3;
} else if (vertex_save_format & VERTEX_TYPE_NORMAL) {
if (mesh->vertex_type & VERTEX_TYPE_NORMAL) {
memcpy(pos, temp + offset, sizeof(f32) * 3);
pos += sizeof(f32) * 3;
offset += 3;
} else {
memset(pos, 0, sizeof(f32) * 3);
pos += sizeof(f32) * 3;
}
}
// We want separate arrays for some data
if ((mesh->vertex_type & VERTEX_TYPE_TEXTURE_COORD) && !(vertex_save_format & VERTEX_TYPE_TEXTURE_COORD)) {
// go to end of vertices * shift by previous array sizes + shift by current vertex -> creates one continous array with this data
memcpy(vertice_start
+ sizeof(f32) * out_vertex_size * mesh->vertex_count
+ sizeof(f32) * normal_count * 3
+ index * sizeof(f32) * 3, temp + offset, sizeof(f32) * 3);
offset += 2;
} else if (vertex_save_format & VERTEX_TYPE_TEXTURE_COORD) {
if (mesh->vertex_type & VERTEX_TYPE_TEXTURE_COORD) {
memcpy(pos, temp + offset, sizeof(f32) * 2);
pos += sizeof(f32) * 2;
offset += 2;
} else {
memset(pos, 0, sizeof(f32) * 2);
pos += sizeof(f32) * 2;
}
}
// We want separate arrays for some data
if ((mesh->vertex_type & VERTEX_TYPE_COLOR) && !(vertex_save_format & VERTEX_TYPE_COLOR)) {
// go to end of vertices * shift by previous array sizes + shift by current vertex -> creates one continous array with this data
memcpy(vertice_start
+ sizeof(f32) * out_vertex_size * mesh->vertex_count
+ sizeof(f32) * normal_count * 3
+ sizeof(f32) * tex_coord_count * 2
+ index * sizeof(f32) * 4, temp + offset, sizeof(f32) * 4);
offset += 4;
} else if (vertex_save_format & VERTEX_TYPE_COLOR) {
if (mesh->vertex_type & VERTEX_TYPE_COLOR) {
memcpy(pos, temp + offset, sizeof(f32) * 4);
pos += sizeof(f32) * 4;
offset += 4;
} else {
memset(pos, 0, sizeof(f32) * 4);
pos += sizeof(f32) * 4;
}
}
temp += offset;
++index;
}
}
// check if we have clean array data already -> output this array data directly
if (mesh->normals && mesh->normal_count > 0) {
memcpy(pos, mesh->normals, mesh->normal_count * sizeof(f32) * 3);
pos += mesh->normal_count * sizeof(f32) * 3;
}
if (mesh->tex_coords && mesh->tex_coord_count > 0) {
memcpy(pos, mesh->tex_coords, mesh->tex_coord_count * sizeof(f32) * 2);
pos += mesh->tex_coord_count * sizeof(f32) * 2;
}
if (mesh->colors && mesh->color_count > 0) {
memcpy(pos, mesh->colors, mesh->color_count * sizeof(f32) * 4);
pos += mesh->color_count * sizeof(f32) * 4;
}
}
// faces/indices
memcpy(pos, &face_save_format, sizeof(face_save_format));
pos += sizeof(face_save_format);
memcpy(pos, &mesh->face_count, sizeof(mesh->face_count));
pos += sizeof(mesh->face_count);
// We are can save the mesh in a different format from the current format -> need to adjust some values
uint32 face_normal_count = mesh->face_normal_count == 0 && (mesh->face_type & FACE_TYPE_NORMALS)
? mesh->face_count
: mesh->face_normal_count;
memcpy(pos, &face_normal_count, sizeof(mesh->face_normal_count));
pos += sizeof(mesh->face_normal_count);
uint32 face_tex_coord_count = mesh->face_tex_coord_count == 0 && (mesh->face_type & FACE_TYPE_TEXTURES)
? mesh->face_count
: mesh->face_tex_coord_count;
memcpy(pos, &face_tex_coord_count, sizeof(mesh->face_tex_coord_count));
pos += sizeof(mesh->face_tex_coord_count);
uint32 face_color_count = mesh->face_color_count == 0 && (mesh->face_type & FACE_TYPE_COLORS)
? mesh->face_count
: mesh->face_color_count;
memcpy(pos, &face_color_count, sizeof(mesh->face_color_count));
pos += sizeof(mesh->face_color_count);
if (mesh->face_count > 0) {
// WARNING: Carefull, we again assume only 3 elements per face
int32 face_size = 0;
if (mesh->face_type & FACE_TYPE_VERTICES) {
face_size += 3;
}
if (mesh->face_type & FACE_TYPE_NORMALS) {
face_size += 3;
}
if (mesh->face_type & FACE_TYPE_TEXTURES) {
face_size += 3;
}
if (mesh->face_type & FACE_TYPE_COLORS) {
face_size += 3;
}
int32 out_face_size = 0;
if (face_save_format & FACE_TYPE_VERTICES) {
out_face_size += 3;
}
if (face_save_format & FACE_TYPE_NORMALS) {
out_face_size += 3;
}
if (face_save_format & FACE_TYPE_TEXTURES) {
out_face_size += 3;
}
if (face_save_format & FACE_TYPE_COLORS) {
out_face_size += 3;
}
if ((mesh->face_type == FACE_TYPE_ALL && face_save_format == FACE_TYPE_ALL)
|| (mesh->face_type == FACE_TYPE_VERTICES && face_save_format == FACE_TYPE_VERTICES)
) {
// data is the same as in the array
memcpy(pos, mesh->faces, face_size * sizeof(uint32) * mesh->face_count);
pos += face_size * sizeof(uint32) * mesh->face_count;
} else {
uint32* temp = mesh->faces;
uint32* end = mesh->faces + mesh->face_count * face_size;
int32 offset;
byte* face_start = pos;
// @bug index gets increased every iteration BUT different groups and objects in the source may have different data
// This comes again down to how to handle hierarchal data with multiple groups and objects
int32 index = 0;
// iterate over all faces to create new output format
// one iteration represents 1 block (a block could be v/vt/vn or, v, or v//vn, ...)
while (temp < end) {
// @question why do I even need offset? couldn't I just directly manipulate temp?
offset = 0;
// First we save everything in one large array if that is the setting
if (face_save_format & FACE_TYPE_VERTICES) {
if (mesh->face_type & FACE_TYPE_VERTICES) {
memcpy(pos, temp, sizeof(uint32));
pos += sizeof(uint32);
offset += 1;
} else {
memset(pos, 0, sizeof(f32));
pos += sizeof(f32);
}
}
// We want separate arrays for some data
if (mesh->face_type & FACE_TYPE_NORMALS && !(face_save_format & FACE_TYPE_NORMALS)) {
// go to end of faces * shift by previous array sizes + shift by current face -> creates one continous array with this data
memcpy(face_start
+ sizeof(uint32) * out_face_size * mesh->face_count
+ index * sizeof(uint32), temp + offset, sizeof(uint32));
offset += 1;
} else if (face_save_format & FACE_TYPE_NORMALS) {
if (mesh->face_type & FACE_TYPE_NORMALS) {
memcpy(pos, temp + offset, sizeof(uint32));
pos += sizeof(uint32);
offset += 1;
} else {
memset(pos, 0, sizeof(uint32));
pos += sizeof(uint32);
}
}
// We want separate arrays for some data
if (mesh->face_type & FACE_TYPE_TEXTURES && !(face_save_format & FACE_TYPE_TEXTURES)) {
// go to end of faces * shift by previous array sizes + shift by current face -> creates one continous array with this data
memcpy(face_start
+ sizeof(uint32) * out_face_size * mesh->face_count
+ sizeof(uint32) * 3 * face_normal_count
+ index * sizeof(uint32), temp + offset, sizeof(uint32));
offset += 1;
} else if (face_save_format & FACE_TYPE_TEXTURES) {
if (mesh->face_type & FACE_TYPE_TEXTURES) {
memcpy(pos, temp + offset, sizeof(uint32));
pos += sizeof(uint32);
offset += 1;
} else {
memset(pos, 0, sizeof(uint32));
pos += sizeof(uint32);
}
}
// We want separate arrays for some data
if (mesh->face_type & VERTEX_TYPE_COLOR && !(face_save_format & VERTEX_TYPE_COLOR)) {
// go to end of faces * shift by previous array sizes + shift by current face -> creates one continous array with this data
memcpy(face_start
+ sizeof(uint32) * out_face_size * mesh->face_count
+ sizeof(uint32) * 3 * face_normal_count
+ sizeof(uint32) * 3 * face_tex_coord_count
+ index * sizeof(uint32), temp + offset, sizeof(uint32));
offset += 1;
} else if (face_save_format & VERTEX_TYPE_COLOR) {
if (mesh->face_type & VERTEX_TYPE_COLOR) {
memcpy(pos, temp + offset, sizeof(uint32));
pos += sizeof(uint32);
offset += 1;
} else {
memset(pos, 0, sizeof(uint32));
pos += sizeof(uint32);
}
}
temp += offset;
++index;
}
}
// check if we have clean array data already -> output this array data directly
if (mesh->face_normals && mesh->face_normal_count > 0) {
memcpy(pos, mesh->face_normals, mesh->face_normal_count * sizeof(uint32) * 3);
pos += mesh->face_normal_count * sizeof(uint32) * 3;
}
if (mesh->face_textures && mesh->face_tex_coord_count > 0) {
memcpy(pos, mesh->face_textures, mesh->face_tex_coord_count * sizeof(uint32) * 3);
pos += mesh->face_tex_coord_count * sizeof(uint32) * 3;
}
if (mesh->face_colors && mesh->face_color_count > 0) {
memcpy(pos, mesh->face_colors, mesh->face_color_count * sizeof(uint32) * 3);
pos += mesh->face_color_count * sizeof(uint32) * 3;
}
}
file.size = pos - file.content;
SWAP_ENDIAN_LITTLE_SIMD(
(int32 *) file.content,
(int32 *) file.content,
file.size / 4, // everything in here is 4 bytes -> super easy to swap
steps
);
/*
FileBody file2;
file2.content = ring_get_memory(ring, file.size, 64);
file2.size = encode_lzp(file.content, file.size, file2.content);
file_write(path, &file2);
*/
file_write(path, &file);
}
#endif
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