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blender-archive/source/blender/draw/intern/draw_cache.h
Hans Goudey b9febb54a4 Geometry Nodes: Support modifier on curve objects 
With this commit, curve objects support the geometry nodes modifier.

Curves objects now evaluate to `CurveEval` unless there was a previous
implicit conversion (tessellating modifiers, mesh modifiers, or the
settings in the curve "Geometry" panel). In the new code, curves are
only considered to be the wire edges-- any generated surface is a mesh
instead, stored in the evaluated geometry set.

The consolidation of concepts mentioned above allows remove a lot of
code that had to do with maintaining the `DispList` type temporarily
for modifiers and rendering. Instead, render engines see a separate
object for the mesh from the mesh geometry component, and when the
curve object evaluates to a curve, the `CurveEval` is always used for
drawing wire edges.

However, currently the `DispList` type is still maintained and used as
an intermediate step in implicit mesh conversion. In the future, more
uses of it could be changed to use `CurveEval` and `Mesh` instead.

This is mostly not changed behavior, it is just a formalization of
existing logic after recent fixes for 2.8 versions last year and two
years ago. Also, in the future more functionality can be converted
to nodes, removing cases of implicit conversions. For more discussion
on that topic, see T89676.

The `use_fill_deform` option is removed. It has not worked properly
since 2.62, and the choice for filling a curve before or after
deformation will work much better and be clearer with a node system.

Applying the geometry nodes modifier to generate a curve is not
implemented with this commit, so applying the modifier won't work
at all. This is a separate technical challenge, and should be solved
in a separate step.

Differential Revision: https://developer.blender.org/D11597
2021-09-11 13:54:40 -05:00

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright 2016, Blender Foundation.
*/
/** \file
* \ingroup draw
*/
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
struct GPUBatch;
struct GPUMaterial;
struct ModifierData;
struct Object;
struct PTCacheEdit;
struct ParticleSystem;
struct Volume;
struct VolumeGrid;
struct bGPDstroke;
/* Shape resolution level of detail */
typedef enum eDRWLevelOfDetail {
DRW_LOD_LOW = 0,
DRW_LOD_MEDIUM = 1,
DRW_LOD_HIGH = 2,
DRW_LOD_MAX, /* Max number of level of detail */
} eDRWLevelOfDetail;
void DRW_shape_cache_free(void);
/* 3D cursor */
struct GPUBatch *DRW_cache_cursor_get(bool crosshair_lines);
/* Common Shapes */
struct GPUBatch *DRW_cache_groundline_get(void);
struct GPUBatch *DRW_cache_grid_get(void);
struct GPUBatch *DRW_cache_fullscreen_quad_get(void);
struct GPUBatch *DRW_cache_quad_get(void);
struct GPUBatch *DRW_cache_quad_wires_get(void);
struct GPUBatch *DRW_cache_cube_get(void);
struct GPUBatch *DRW_cache_normal_arrow_get(void);
struct GPUBatch *DRW_cache_sphere_get(const eDRWLevelOfDetail level_of_detail);
/* Dummy VBOs */
struct GPUBatch *DRW_gpencil_dummy_buffer_get(void);
/* Common Object */
struct GPUBatch *DRW_cache_object_all_edges_get(struct Object *ob);
struct GPUBatch *DRW_cache_object_edge_detection_get(struct Object *ob, bool *r_is_manifold);
struct GPUBatch *DRW_cache_object_surface_get(struct Object *ob);
struct GPUBatch *DRW_cache_object_loose_edges_get(struct Object *ob);
struct GPUBatch **DRW_cache_object_surface_material_get(struct Object *ob,
struct GPUMaterial **gpumat_array,
uint gpumat_array_len);
struct GPUBatch *DRW_cache_object_face_wireframe_get(struct Object *ob);
int DRW_cache_object_material_count_get(struct Object *ob);
struct GPUVertBuf *DRW_cache_object_pos_vertbuf_get(struct Object *ob);
/* Empties */
struct GPUBatch *DRW_cache_plain_axes_get(void);
struct GPUBatch *DRW_cache_single_arrow_get(void);
struct GPUBatch *DRW_cache_empty_cube_get(void);
struct GPUBatch *DRW_cache_circle_get(void);
struct GPUBatch *DRW_cache_empty_sphere_get(void);
struct GPUBatch *DRW_cache_empty_cylinder_get(void);
struct GPUBatch *DRW_cache_empty_cone_get(void);
struct GPUBatch *DRW_cache_empty_capsule_cap_get(void);
struct GPUBatch *DRW_cache_empty_capsule_body_get(void);
/* Force Field */
struct GPUBatch *DRW_cache_field_wind_get(void);
struct GPUBatch *DRW_cache_field_force_get(void);
struct GPUBatch *DRW_cache_field_vortex_get(void);
struct GPUBatch *DRW_cache_field_curve_get(void);
struct GPUBatch *DRW_cache_field_tube_limit_get(void);
struct GPUBatch *DRW_cache_field_cone_limit_get(void);
struct GPUBatch *DRW_cache_field_sphere_limit_get(void);
/* Lights */
struct GPUBatch *DRW_cache_light_point_lines_get(void);
struct GPUBatch *DRW_cache_light_sun_lines_get(void);
struct GPUBatch *DRW_cache_light_spot_lines_get(void);
struct GPUBatch *DRW_cache_light_area_disk_lines_get(void);
struct GPUBatch *DRW_cache_light_area_square_lines_get(void);
struct GPUBatch *DRW_cache_light_spot_volume_get(void);
/* Camera */
struct GPUBatch *DRW_cache_camera_frame_get(void);
struct GPUBatch *DRW_cache_camera_volume_get(void);
struct GPUBatch *DRW_cache_camera_volume_wire_get(void);
struct GPUBatch *DRW_cache_camera_tria_wire_get(void);
struct GPUBatch *DRW_cache_camera_tria_get(void);
struct GPUBatch *DRW_cache_camera_distances_get(void);
/* Speaker */
struct GPUBatch *DRW_cache_speaker_get(void);
/* Probe */
struct GPUBatch *DRW_cache_lightprobe_cube_get(void);
struct GPUBatch *DRW_cache_lightprobe_grid_get(void);
struct GPUBatch *DRW_cache_lightprobe_planar_get(void);
/* Bones */
struct GPUBatch *DRW_cache_bone_octahedral_get(void);
struct GPUBatch *DRW_cache_bone_octahedral_wire_get(void);
struct GPUBatch *DRW_cache_bone_box_get(void);
struct GPUBatch *DRW_cache_bone_box_wire_get(void);
struct GPUBatch *DRW_cache_bone_envelope_solid_get(void);
struct GPUBatch *DRW_cache_bone_envelope_outline_get(void);
struct GPUBatch *DRW_cache_bone_point_get(void);
struct GPUBatch *DRW_cache_bone_point_wire_outline_get(void);
struct GPUBatch *DRW_cache_bone_stick_get(void);
struct GPUBatch *DRW_cache_bone_arrows_get(void);
struct GPUBatch *DRW_cache_bone_dof_sphere_get(void);
struct GPUBatch *DRW_cache_bone_dof_lines_get(void);
/* Meshes */
struct GPUBatch *DRW_cache_mesh_all_verts_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_all_edges_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_loose_edges_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_edge_detection_get(struct Object *ob, bool *r_is_manifold);
struct GPUBatch *DRW_cache_mesh_surface_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_surface_edges_get(struct Object *ob);
struct GPUBatch **DRW_cache_mesh_surface_shaded_get(struct Object *ob,
struct GPUMaterial **gpumat_array,
uint gpumat_array_len);
struct GPUBatch **DRW_cache_mesh_surface_texpaint_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_surface_texpaint_single_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_surface_vertpaint_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_surface_sculptcolors_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_surface_weights_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_surface_mesh_analysis_get(struct Object *ob);
struct GPUBatch *DRW_cache_mesh_face_wireframe_get(struct Object *ob);
/* Curve */
struct GPUBatch *DRW_cache_curve_edge_wire_get(struct Object *ob);
/* edit-mode */
struct GPUBatch *DRW_cache_curve_edge_normal_get(struct Object *ob);
struct GPUBatch *DRW_cache_curve_edge_overlay_get(struct Object *ob);
struct GPUBatch *DRW_cache_curve_vert_overlay_get(struct Object *ob);
/* Font */
struct GPUBatch *DRW_cache_text_edge_wire_get(struct Object *ob);
/* Surface */
struct GPUBatch *DRW_cache_surf_surface_get(struct Object *ob);
struct GPUBatch *DRW_cache_surf_edge_wire_get(struct Object *ob);
struct GPUBatch *DRW_cache_surf_loose_edges_get(struct Object *ob);
struct GPUBatch **DRW_cache_surf_surface_shaded_get(struct Object *ob,
struct GPUMaterial **gpumat_array,
uint gpumat_array_len);
struct GPUBatch *DRW_cache_surf_face_wireframe_get(struct Object *ob);
struct GPUBatch *DRW_cache_surf_edge_detection_get(struct Object *ob, bool *r_is_manifold);
/* Lattice */
struct GPUBatch *DRW_cache_lattice_verts_get(struct Object *ob);
struct GPUBatch *DRW_cache_lattice_wire_get(struct Object *ob, bool use_weight);
struct GPUBatch *DRW_cache_lattice_vert_overlay_get(struct Object *ob);
/* Particles */
struct GPUBatch *DRW_cache_particles_get_hair(struct Object *object,
struct ParticleSystem *psys,
struct ModifierData *md);
struct GPUBatch *DRW_cache_particles_get_dots(struct Object *object, struct ParticleSystem *psys);
struct GPUBatch *DRW_cache_particles_get_edit_strands(struct Object *object,
struct ParticleSystem *psys,
struct PTCacheEdit *edit,
bool use_weight);
struct GPUBatch *DRW_cache_particles_get_edit_inner_points(struct Object *object,
struct ParticleSystem *psys,
struct PTCacheEdit *edit);
struct GPUBatch *DRW_cache_particles_get_edit_tip_points(struct Object *object,
struct ParticleSystem *psys,
struct PTCacheEdit *edit);
struct GPUBatch *DRW_cache_particles_get_prim(int type);
/* Metaball */
struct GPUBatch *DRW_cache_mball_surface_get(struct Object *ob);
struct GPUBatch **DRW_cache_mball_surface_shaded_get(struct Object *ob,
struct GPUMaterial **gpumat_array,
uint gpumat_array_len);
struct GPUBatch *DRW_cache_mball_face_wireframe_get(struct Object *ob);
struct GPUBatch *DRW_cache_mball_edge_detection_get(struct Object *ob, bool *r_is_manifold);
/* Hair */
struct GPUBatch *DRW_cache_hair_surface_get(struct Object *ob);
struct GPUBatch **DRW_cache_hair_surface_shaded_get(struct Object *ob,
struct GPUMaterial **gpumat_array,
uint gpumat_array_len);
struct GPUBatch *DRW_cache_hair_face_wireframe_get(struct Object *ob);
struct GPUBatch *DRW_cache_hair_edge_detection_get(struct Object *ob, bool *r_is_manifold);
/* PointCloud */
struct GPUBatch *DRW_cache_pointcloud_get_dots(struct Object *obj);
struct GPUBatch *DRW_cache_pointcloud_surface_get(struct Object *obj);
/* Volume */
typedef struct DRWVolumeGrid {
struct DRWVolumeGrid *next, *prev;
/* Grid name. */
char *name;
/* 3D texture. */
struct GPUTexture *texture;
/* Transform between 0..1 texture space and object space. */
float texture_to_object[4][4];
float object_to_texture[4][4];
/* Transform from bounds to texture space. */
float object_to_bounds[4][4];
float bounds_to_texture[4][4];
} DRWVolumeGrid;
DRWVolumeGrid *DRW_volume_batch_cache_get_grid(struct Volume *volume,
const struct VolumeGrid *grid);
struct GPUBatch *DRW_cache_volume_face_wireframe_get(struct Object *ob);
struct GPUBatch *DRW_cache_volume_selection_surface_get(struct Object *ob);
/* GPencil */
struct GPUBatch *DRW_cache_gpencil_strokes_get(struct Object *ob, int cfra);
struct GPUBatch *DRW_cache_gpencil_fills_get(struct Object *ob, int cfra);
struct GPUBatch *DRW_cache_gpencil_edit_lines_get(struct Object *ob, int cfra);
struct GPUBatch *DRW_cache_gpencil_edit_points_get(struct Object *ob, int cfra);
struct GPUBatch *DRW_cache_gpencil_edit_curve_handles_get(struct Object *ob, int cfra);
struct GPUBatch *DRW_cache_gpencil_edit_curve_points_get(struct Object *ob, int cfra);
struct GPUBatch *DRW_cache_gpencil_sbuffer_stroke_get(struct Object *ob);
struct GPUBatch *DRW_cache_gpencil_sbuffer_fill_get(struct Object *ob);
struct GPUBatch *DRW_cache_gpencil_face_wireframe_get(struct Object *ob);
struct bGPDstroke *DRW_cache_gpencil_sbuffer_stroke_data_get(struct Object *ob);
void DRW_cache_gpencil_sbuffer_clear(struct Object *ob);
#ifdef __cplusplus
}
#endif
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