94 lines
3.7 KiB
C++
94 lines
3.7 KiB
C++
/* SPDX-FileCopyrightText: 2018 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup bke
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*/
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#pragma once
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#include "BLI_sys_types.h"
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struct Mesh;
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struct OpenSubdiv_EvaluatorCache;
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struct OpenSubdiv_EvaluatorSettings;
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struct Subdiv;
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enum eSubdivEvaluatorType {
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SUBDIV_EVALUATOR_TYPE_CPU,
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SUBDIV_EVALUATOR_TYPE_GPU,
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};
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/* Returns true if evaluator is ready for use. */
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bool BKE_subdiv_eval_begin(Subdiv *subdiv,
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eSubdivEvaluatorType evaluator_type,
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OpenSubdiv_EvaluatorCache *evaluator_cache,
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const OpenSubdiv_EvaluatorSettings *settings);
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/* coarse_vertex_cos is an optional argument which allows to override coordinates of the coarse
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* mesh. */
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bool BKE_subdiv_eval_begin_from_mesh(Subdiv *subdiv,
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const Mesh *mesh,
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const float (*coarse_vertex_cos)[3],
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eSubdivEvaluatorType evaluator_type,
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OpenSubdiv_EvaluatorCache *evaluator_cache);
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bool BKE_subdiv_eval_refine_from_mesh(Subdiv *subdiv,
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const Mesh *mesh,
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const float (*coarse_vertex_cos)[3]);
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/* Makes sure displacement evaluator is initialized.
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*
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* NOTE: This function must be called once before evaluating displacement or
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* final surface position. */
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void BKE_subdiv_eval_init_displacement(Subdiv *subdiv);
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/* Single point queries. */
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/* Evaluate point at a limit surface, with optional derivatives and normal. */
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void BKE_subdiv_eval_limit_point(
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Subdiv *subdiv, int ptex_face_index, float u, float v, float r_P[3]);
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void BKE_subdiv_eval_limit_point_and_derivatives(Subdiv *subdiv,
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int ptex_face_index,
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float u,
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float v,
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float r_P[3],
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float r_dPdu[3],
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float r_dPdv[3]);
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void BKE_subdiv_eval_limit_point_and_normal(
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Subdiv *subdiv, int ptex_face_index, float u, float v, float r_P[3], float r_N[3]);
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/* Evaluate smoothly interpolated vertex data (such as ORCO). */
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void BKE_subdiv_eval_vertex_data(Subdiv *subdiv,
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const int ptex_face_index,
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const float u,
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const float v,
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float r_vertex_data[]);
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/* Evaluate face-varying layer (such as UV). */
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void BKE_subdiv_eval_face_varying(Subdiv *subdiv,
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int face_varying_channel,
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int ptex_face_index,
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float u,
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float v,
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float r_face_varying[2]);
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/* NOTE: Expects derivatives to be correct.
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*
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* TODO(sergey): This is currently used together with
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* BKE_subdiv_eval_final_point() which can easily evaluate derivatives.
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* Would be nice to have displacement evaluation function which does not require
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* knowing derivatives ahead of a time. */
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void BKE_subdiv_eval_displacement(Subdiv *subdiv,
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int ptex_face_index,
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float u,
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float v,
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const float dPdu[3],
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const float dPdv[3],
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float r_D[3]);
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/* Evaluate point on a limit surface with displacement applied to it. */
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void BKE_subdiv_eval_final_point(
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Subdiv *subdiv, int ptex_face_index, float u, float v, float r_P[3]);
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