normal.vert

#ifdef MORPHING_TEXTURE_BASED_NORMAL
uniform highp sampler2D morphNormalTex;
#endif

vec3 getNormal() {
    #ifdef SKIN
    dNormalMatrix = mat3(dModelMatrix[0].xyz, dModelMatrix[1].xyz, dModelMatrix[2].xyz);
    #elif defined(INSTANCING)
    dNormalMatrix = mat3(instance_line1.xyz, instance_line2.xyz, instance_line3.xyz);
    #else
    dNormalMatrix = matrix_normal;
    #endif

    vec3 tempNormal = vertex_normal;

    #ifdef MORPHING
    #ifdef MORPHING_NRM03
    tempNormal += morph_weights_a[0] * morph_nrm0;
    tempNormal += morph_weights_a[1] * morph_nrm1;
    tempNormal += morph_weights_a[2] * morph_nrm2;
    tempNormal += morph_weights_a[3] * morph_nrm3;
    #endif
    #ifdef MORPHING_NRM47
    tempNormal += morph_weights_b[0] * morph_nrm4;
    tempNormal += morph_weights_b[1] * morph_nrm5;
    tempNormal += morph_weights_b[2] * morph_nrm6;
    tempNormal += morph_weights_b[3] * morph_nrm7;
    #endif
    #endif

    #ifdef MORPHING_TEXTURE_BASED_NORMAL
    // apply morph offset from texture
    vec2 morphUV = getTextureMorphCoords();
    vec3 morphNormal = texture2D(morphNormalTex, morphUV).xyz;
    tempNormal += morphNormal;
    #endif

    return normalize(dNormalMatrix * tempNormal);
}