fte/quakespasm
2
0
Fork 0
mirror of https://github.com/Shpoike/Quakespasm.git synced 2025-03-13 22:34:16 +00:00
Code Issues Projects Releases Packages Wiki Activity

memory saving: store the normals in a signed char[4]

Browse source
This commit is contained in:
Eric Wasylishen 2014-10-18 01:06:38 -06:00
parent f4cd8e8e5f
commit 8fc1bb9d98
3 changed files with 12 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
quakespasm/Quake/gl_mesh.c
View file

@ -537,9 +537,13 @@ void GLMesh_LoadVertexBuffers (void)
xyz[v].xyz[2] = trivert.v[2];
xyz[v].xyz[3] = 1; // need w 1 for 4 byte vertex compression
xyz[v].normal[0] = r_avertexnormals[trivert.lightnormalindex][0];
xyz[v].normal[1] = r_avertexnormals[trivert.lightnormalindex][1];
xyz[v].normal[2] = r_avertexnormals[trivert.lightnormalindex][2];
// map the normal coordinates in [-1..1] to [-127..127] and store in an unsigned char.
// this introduces some error (less than 0.004), but the normals were very coarse
// to begin with
xyz[v].normal[0] = 127 * r_avertexnormals[trivert.lightnormalindex][0];
xyz[v].normal[1] = 127 * r_avertexnormals[trivert.lightnormalindex][1];
xyz[v].normal[2] = 127 * r_avertexnormals[trivert.lightnormalindex][2];
xyz[v].normal[3] = 0; // unused; for 4-byte alignment
}
GL_BufferSubDataFunc (GL_ARRAY_BUFFER,

2
quakespasm/Quake/gl_model.h
View file

@ -293,7 +293,7 @@ typedef struct aliasmesh_s
typedef struct meshxyz_s
{
byte xyz[4];
float normal[3];
signed char normal[4];
} meshxyz_t;
typedef struct meshst_s

6
quakespasm/Quake/r_alias.c
View file

@ -233,10 +233,12 @@ void GL_DrawAliasFrame_GLSL (aliashdr_t *paliashdr, lerpdata_t lerpdata)
GL_ClientActiveTextureFunc (GL_TEXTURE2_ARB);
glDisableClientState (GL_TEXTURE_COORD_ARRAY);
GL_VertexAttribPointerFunc (pose1NormalAttrIndex, 3, GL_FLOAT, GL_FALSE, sizeof (meshxyz_t), GLARB_GetNormalOffset (paliashdr, lerpdata.pose1));
// GL_TRUE to normalize the signed bytes to [-1 .. 1]
GL_VertexAttribPointerFunc (pose1NormalAttrIndex, 3, GL_BYTE, GL_TRUE, sizeof (meshxyz_t), GLARB_GetNormalOffset (paliashdr, lerpdata.pose1));
GL_EnableVertexAttribArrayFunc (pose1NormalAttrIndex);
GL_VertexAttribPointerFunc (pose2NormalAttrIndex, 3, GL_FLOAT, GL_FALSE, sizeof (meshxyz_t), GLARB_GetNormalOffset (paliashdr, lerpdata.pose2));
GL_VertexAttribPointerFunc (pose2NormalAttrIndex, 3, GL_BYTE, GL_TRUE, sizeof (meshxyz_t), GLARB_GetNormalOffset (paliashdr, lerpdata.pose2));
GL_EnableVertexAttribArrayFunc (pose2NormalAttrIndex);
// set uniforms