#151153 - iprice - Wed Feb 20, 2008 1:19 am
I have quite happily been using MD2 files in efs section and reading them in when I need them... but I need to include an MD2 as a bin so it is in main memory... are there any examples of MD2 as bins out there?
#151173 - nipil - Wed Feb 20, 2008 2:02 pm
i'd say, simply put it in a 'data' folder ?
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#151188 - iprice - Wed Feb 20, 2008 6:19 pm
What makefile commands are needed....
and how can I read chunks of the bin file similar to efs_read.....
#151191 - iprice - Wed Feb 20, 2008 6:48 pm
Yeah OK so the makefile is quite easy.... but how can I get chunks of the bin file such as the header, triangles etc from the bin? efs_read uses seek and read but I don't know how to do that with a bin file in memory, not in efs....
#151204 - yellowstar - Wed Feb 20, 2008 10:56 pm
| Code: |
u8 *stream = (u8*)md2_bin;//Change this to the name of your md2 file
//For reading data into structs, do this:
SSomeStruct *somestruct=NULL;
somestruct = (*SSomeStruct)pos;
//For buffers and similar things, do something like this:
u8 *somebuffer = (u8*)malloc(18);
memcpy(somebuffer,stream,18);
//For copying into single bytes, do this:
u8 my_byte = *stream;
//After every read like above, you must increase the value of stream
//by the number of bytes read.
//Structs
stream += sizeof(SSomeStruct);
//Buffers
stream += 18;//18 should be replaced by the actual number of the bytes read
//Single bytes
stream++;
//For seeking, simply do an addition or substraction operation on stream, or a = operation.
|
#151205 - iprice - Wed Feb 20, 2008 11:10 pm
This is the start of the MD2 code with efs
| Code: |
EFS_FILE* file;
file = EFS_fopen(Filename);
EFS_fread(&Models[num].header, 1, sizeof (md2_header_t), file);
Models[num].texcoords = (md2_texCoord_t *)malloc (sizeof (md2_texCoord_t) * Models[num].header.num_st);
Models[num].triangles = (md2_triangle_t *)malloc (sizeof (md2_triangle_t) * Models[num].header.num_tris);
Models[num].frames = (md2_frame_t *)malloc (sizeof(md2_frame_t) * Models[num].header.num_frames);
EFS_fseek(file, Models[num].header.offset_st, SEEK_SET);
EFS_fread(Models[num].texcoords, Models[num].header.num_st, sizeof (md2_texCoord_t), file);
|
I am trying to convert it to read an MD2 that has been compiled into the memory as a bin. Thanks for the help, I'll have a look at it again.
Anyone has any other help, please let me know.
Cheers
#151256 - iprice - Fri Feb 22, 2008 1:34 am
Last edited by iprice on Sun Feb 24, 2008 4:27 pm; edited 1 time in total
#151365 - iprice - Sun Feb 24, 2008 4:27 pm
Anyone got any spare time?
Cheers.
#151368 - DiscoStew - Sun Feb 24, 2008 6:49 pm
What was wrong with your most recent code? If I remembered how it looked, that was pretty similar to how I'd deal with loading a binary file into a section of memory, and parsing out bits of data for reading.
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#151375 - iprice - Sun Feb 24, 2008 9:06 pm
This first bits of data are OK but very long winded.... but later I try to replace:
| Code: |
EFS_fread(Models[num].frames[i].verts, Models[num].header.num_vertices, sizeof(md2_vertex_t), file);
|
with:
| Code: |
for (uu = 0; uu < Models[num].header.num_vertices; uu++)
{
memcpy(somebuffer,stream,sizeof(unsigned char));
Models[num].frames[i].verts->v[0] = *somebuffer;
stream += sizeof(unsigned char);
memcpy(somebuffer,stream,sizeof(unsigned char));
Models[num].frames[i].verts->v[1] = *somebuffer;
stream += sizeof(unsigned char);
memcpy(somebuffer,stream,sizeof(unsigned char));
Models[num].frames[i].verts->v[2] = *somebuffer;
stream += sizeof(unsigned char);
memcpy(somebuffer,stream,sizeof(unsigned char));
Models[num].frames[i].verts->normalIndex = *somebuffer;
stream += sizeof(unsigned char);
}
|
but the verts are pointers in the structure and it's just not right.......
| Code: |
typedef struct
{
md2_header_t header;
md2_texCoord_t *texcoords;
md2_triangle_t *triangles;
md2_frame_t *frames;//this bit
nds_texCoord_t *uvs;
nds_triangle_t *tris;
nds_frame_t *frms;
}MD2Entity;
|
is the MD2
| Code: |
typedef struct
{
vec3_t scale;
vec3_t translate;
char name[16];
md2_vertex_t *verts;//verts are a pointer
} md2_frame_t; |
//this is the frame
| Code: |
typedef struct
{
unsigned char v[3];
unsigned char normalIndex;
} md2_vertex_t;
|
//this is one the verts in the frame
my code just isn't right and I'm not sure how to fix it.... I assume I am re-writing the same vert over top of itself each time.....
any ideas? anyone want the full source to laugh at my terrible coding?
#151379 - yellowstar - Sun Feb 24, 2008 9:36 pm
| iprice wrote: |
but the verts are pointers in the structure and it's just not right.......
| Code: |
Models[num].frames[i].verts->v[0] = *somebuffer;
|
|
The answer is at the start of the loop...
| Code: |
for (uu = 0; uu < Models[num].header.num_vertices; uu++)
|
I've wrote a MD2 loader before, just not on the DS.(PC)
(And it's been a long time since I even looked at that code, however...)
#151381 - iprice - Sun Feb 24, 2008 9:58 pm
Thanks.... before I wasn't getting anything displayed.... now I have garbled polys but I'm getting there.
Thanks... I'll keep going through it :)
#151492 - yellowstar - Wed Feb 27, 2008 9:41 pm
| iprice wrote: |
I'm trying to replace this:
| Code: | EFS_fread(Models[num].frames[i].verts, Models[num].header.num_vertices, sizeof(md2_vertex_t), file);
|
with this:
|
Try this:
| Code: |
memcpy(Models[num].frames[i].verts, stream, (int)(Models[num].header.num_vertices * sizeof(md2_vertex_t)));
stream += (int)(Models[num].header.num_vertices * sizeof(md2_vertex_t));
|
#151496 - iprice - Wed Feb 27, 2008 10:18 pm
Hmmm, when I output the verts to screen I am getting lots of -1 values which I assume are overflow values that are too big for the type..... but the types for the data are correct as it works with efs, so I must still be reading the wrong values from the bin file......
thanks for the idea, but still no joy :(
Hang on.....
I was reading the scale wrong, as an int, not a float , so it was overflowing...... works! yay.
Thanks for all your help yellowstar!