A bit ago I had Spine-c up and running just fine with our internal engine. Today i updated and found a few changes that puzzled me as well as messed with our rendering of spine animations. So my question is..
Previous code for RegionAttachment.c
void RegionAttachment_updateVertices (RegionAttachment* self, Slot* slot) {
float* offset = self->offset;
Bone* bone = slot->bone;
self->vertices[VERTEX_X1] = offset[VERTEX_X1] * bone->m00 + offset[VERTEX_Y1] * bone->m01 + bone->worldX;
self->vertices[VERTEX_Y1] = offset[VERTEX_X1] * bone->m10 + offset[VERTEX_Y1] * bone->m11 + bone->worldY;
self->vertices[VERTEX_X2] = offset[VERTEX_X2] * bone->m00 + offset[VERTEX_Y2] * bone->m01 + bone->worldX;
self->vertices[VERTEX_Y2] = offset[VERTEX_X2] * bone->m10 + offset[VERTEX_Y2] * bone->m11 + bone->worldY;
self->vertices[VERTEX_X3] = offset[VERTEX_X3] * bone->m00 + offset[VERTEX_Y3] * bone->m01 + bone->worldX;
self->vertices[VERTEX_Y3] = offset[VERTEX_X3] * bone->m10 + offset[VERTEX_Y3] * bone->m11 + bone->worldY;
self->vertices[VERTEX_X4] = offset[VERTEX_X4] * bone->m00 + offset[VERTEX_Y4] * bone->m01 + bone->worldX;
self->vertices[VERTEX_Y4] = offset[VERTEX_X4] * bone->m10 + offset[VERTEX_Y4] * bone->m11 + bone->worldY;
}
Current RegionAttachment.c
void RegionAttachment_computeVertices (RegionAttachment* self, float x, float y, Bone* bone, float* vertices) {
float* offset = self->offset;
x += bone->worldX;
y += bone->worldY;
vertices[VERTEX_X1] = offset[VERTEX_X1] * bone->m00 + offset[VERTEX_Y1] * bone->m01 + x;
vertices[VERTEX_Y1] = offset[VERTEX_X1] * bone->m10 + offset[VERTEX_Y1] * bone->m11 + y;
vertices[VERTEX_X2] = offset[VERTEX_X2] * bone->m00 + offset[VERTEX_Y2] * bone->m01 + x;
vertices[VERTEX_Y2] = offset[VERTEX_X2] * bone->m10 + offset[VERTEX_Y2] * bone->m11 + y;
vertices[VERTEX_X3] = offset[VERTEX_X3] * bone->m00 + offset[VERTEX_Y3] * bone->m01 + x;
vertices[VERTEX_Y3] = offset[VERTEX_X3] * bone->m10 + offset[VERTEX_Y3] * bone->m11 + y;
vertices[VERTEX_X4] = offset[VERTEX_X4] * bone->m00 + offset[VERTEX_Y4] * bone->m01 + x;
vertices[VERTEX_Y4] = offset[VERTEX_X4] * bone->m10 + offset[VERTEX_Y4] * bone->m11 + y;
}
The main part that I'm looking at with the change is why x and y are incremented by the bone->worldXY .. this messed our rendering up in a big way..
I have a work around ( pass zero for both x and y ) but what i wanted to know was why is it coded in this way.. is it to support a certain form on atlas sheets or something.. or am i missing something with the code base that i should conform to so that I keep my compatibility with the spine system as a whole.
Thanks for you time and responses.
