diff options
Diffstat (limited to 'intern/cycles/kernel/geom/geom_patch.h')
| -rw-r--r-- | intern/cycles/kernel/geom/geom_patch.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/intern/cycles/kernel/geom/geom_patch.h b/intern/cycles/kernel/geom/geom_patch.h index 0143b384aa2..edb82172959 100644 --- a/intern/cycles/kernel/geom/geom_patch.h +++ b/intern/cycles/kernel/geom/geom_patch.h @@ -284,6 +284,33 @@ ccl_device float patch_eval_float(KernelGlobals *kg, const ShaderData *sd, int o return val; } +ccl_device float2 patch_eval_float2(KernelGlobals *kg, const ShaderData *sd, int offset, + int patch, float u, float v, int channel, + float2 *du, float2 *dv) +{ + int indices[PATCH_MAX_CONTROL_VERTS]; + float weights[PATCH_MAX_CONTROL_VERTS]; + float weights_du[PATCH_MAX_CONTROL_VERTS]; + float weights_dv[PATCH_MAX_CONTROL_VERTS]; + + int num_control = patch_eval_control_verts(kg, sd->object, patch, u, v, channel, + indices, weights, weights_du, weights_dv); + + float2 val = make_float2(0.0f, 0.0f); + if(du) *du = make_float2(0.0f, 0.0f); + if(dv) *dv = make_float2(0.0f, 0.0f); + + for(int i = 0; i < num_control; i++) { + float2 v = kernel_tex_fetch(__attributes_float2, offset + indices[i]); + + val += v * weights[i]; + if(du) *du += v * weights_du[i]; + if(dv) *dv += v * weights_dv[i]; + } + + return val; +} + ccl_device float3 patch_eval_float3(KernelGlobals *kg, const ShaderData *sd, int offset, int patch, float u, float v, int channel, float3 *du, float3 *dv) |