diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_displace.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_displace.h | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/intern/cycles/kernel/svm/svm_displace.h b/intern/cycles/kernel/svm/svm_displace.h index b1677f67eca..92f23990ad1 100644 --- a/intern/cycles/kernel/svm/svm_displace.h +++ b/intern/cycles/kernel/svm/svm_displace.h @@ -20,23 +20,35 @@ CCL_NAMESPACE_BEGIN /* Bump Node */ -__device void svm_node_set_bump(ShaderData *sd, float *stack, uint c_offset, uint x_offset, uint y_offset) +__device void svm_node_set_bump(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node) { #ifdef __RAY_DIFFERENTIALS__ + /* get normal input */ + float3 normal_in = stack_valid(node.y)? stack_load_float3(stack, node.y): sd->N; + + /* get surface tangents from normal */ + float3 Rx = cross(sd->dP.dy, normal_in); + float3 Ry = cross(normal_in, sd->dP.dx); + + /* get bump values */ + uint c_offset, x_offset, y_offset, intensity_offset; + decode_node_uchar4(node.z, &c_offset, &x_offset, &y_offset, &intensity_offset); + float h_c = stack_load_float(stack, c_offset); float h_x = stack_load_float(stack, x_offset); float h_y = stack_load_float(stack, y_offset); - float3 Rx = cross(sd->dP.dy, sd->N); - float3 Ry = cross(sd->N, sd->dP.dx); - + /* compute surface gradient and determinant */ float det = dot(sd->dP.dx, Rx); float3 surfgrad = (h_x - h_c)*Rx + (h_y - h_c)*Ry; + float intensity = stack_load_float(stack, intensity_offset); - surfgrad *= 0.1f; /* todo: remove this factor */ - + surfgrad *= intensity; float absdet = fabsf(det); - sd->N = normalize(absdet*sd->N - signf(det)*surfgrad); + + /* compute and output perturbed normal */ + float3 outN = normalize(absdet*normal_in - signf(det)*surfgrad); + stack_store_float3(stack, node.w, outN); #endif } |