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To reduce shader state changes and compilations, just use the

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four-bone-per-vertex configuration for all skinned meshes.  Depending on 
the models we have, it may be worth compiling a separate one for two 
bones per vertex.  Added a hook to customize the material color (for 
per-vertex colors, e.g.)


git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@245 ed5b42cb-e716-0410-a449-f6a68f950b19
This commit is contained in:
Andrzej Kapolka
2007-05-15 00:55:19 +00:00
parent 124af1e0b1
commit c755fd626a
3 changed files with 34 additions and 46 deletions
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rsrc/media/jme/skin.vert
+9 -23
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@@ -19,24 +19,14 @@
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#if BONES_PER_VERTEX == 4
#define ATTRIB_TYPE vec4
#elif BONES_PER_VERTEX == 3
#define ATTRIB_TYPE vec3
#elif BONES_PER_VERTEX == 2
#define ATTRIB_TYPE vec2
#else
#define ATTRIB_TYPE float
#endif
/** The bone transforms. */
uniform mat4 boneTransforms[MAX_BONE_COUNT];
/** The bone indices. */
attribute ATTRIB_TYPE boneIndices;
attribute vec4 boneIndices;
/** The bone weights. */
attribute ATTRIB_TYPE boneWeights;
attribute vec4 boneWeights;
/** The amount of fog. */
#ifdef FOG
@@ -51,17 +41,13 @@ void main ()
vec4 normal4 = vec4(gl_Normal, 0.0);
// add up the vertex as transformed by each bone and scaled by each weight
#if BONES_PER_VERTEX == 1
vec4 modelVertex = boneTransforms[int(boneIndices)] * gl_Vertex * boneWeights;
vec4 modelNormal = boneTransforms[int(boneIndices)] * normal4 * boneWeights;
#else
vec4 modelVertex = boneTransforms[int(boneIndices[0])] * gl_Vertex * boneWeights[0];
vec4 modelNormal = boneTransforms[int(boneIndices[0])] * normal4 * boneWeights[0];
for (int ii = 1; ii < BONES_PER_VERTEX; ii++) {
modelVertex += boneTransforms[int(boneIndices[ii])] * gl_Vertex * boneWeights[ii];
modelNormal += boneTransforms[int(boneIndices[ii])] * normal4 * boneWeights[ii];
}
#endif
vec4 modelVertex = vec4(0.0, 0.0, 0.0, 0.0);
vec4 modelNormal = vec4(0.0, 0.0, 0.0, 0.0);
for (int ii = 0; ii < 4; ii++) {
mat4 boneTransform = boneTransforms[int(boneIndices[ii])];
modelVertex += boneTransform * gl_Vertex * boneWeights[ii];
modelNormal += boneTransform * normal4 * boneWeights[ii];
}
// apply the standard transformation
gl_Position = gl_ModelViewProjectionMatrix * modelVertex;