diff options
Diffstat (limited to 'source/blender/draw/intern/draw_volume.cc')
| -rw-r--r-- | source/blender/draw/intern/draw_volume.cc | 266 |
1 files changed, 266 insertions, 0 deletions
diff --git a/source/blender/draw/intern/draw_volume.cc b/source/blender/draw/intern/draw_volume.cc new file mode 100644 index 00000000000..c9c8acaef40 --- /dev/null +++ b/source/blender/draw/intern/draw_volume.cc @@ -0,0 +1,266 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * Copyright 2022 Blender Foundation. All rights reserved. */ + +/** \file + * \ingroup draw + * + * \brief Contains Volume object GPU attributes configuration. + */ + +#include "DRW_gpu_wrapper.hh" +#include "DRW_render.h" + +#include "DNA_fluid_types.h" +#include "DNA_volume_types.h" + +#include "BKE_fluid.h" +#include "BKE_global.h" +#include "BKE_mesh.h" +#include "BKE_modifier.h" +#include "BKE_volume.h" +#include "BKE_volume_render.h" + +#include "GPU_material.h" + +#include "draw_common.h" +#include "draw_manager.h" + +using namespace blender; +using namespace blender::draw; +using VolumeInfosBuf = blender::draw::UniformBuffer<VolumeInfos>; + +static struct { + GPUTexture *dummy_zero; + GPUTexture *dummy_one; + float dummy_grid_mat[4][4]; +} g_data = {}; + +struct VolumeUniformBufPool { + Vector<VolumeInfosBuf *> ubos; + uint used = 0; + + ~VolumeUniformBufPool() + { + for (VolumeInfosBuf *ubo : ubos) { + delete ubo; + } + } + + void reset() + { + used = 0; + } + + VolumeInfosBuf *alloc() + { + if (used >= ubos.size()) { + VolumeInfosBuf *buf = new VolumeInfosBuf(); + ubos.append(buf); + return buf; + } + return ubos[used++]; + } +}; + +void DRW_volume_ubos_pool_free(void *pool) +{ + delete reinterpret_cast<VolumeUniformBufPool *>(pool); +} + +static void drw_volume_globals_init(void) +{ + const float zero[4] = {0.0f, 0.0f, 0.0f, 0.0f}; + const float one[4] = {1.0f, 1.0f, 1.0f, 1.0f}; + g_data.dummy_zero = GPU_texture_create_3d( + "dummy_zero", 1, 1, 1, 1, GPU_RGBA8, GPU_DATA_FLOAT, zero); + g_data.dummy_one = GPU_texture_create_3d( + "dummy_one", 1, 1, 1, 1, GPU_RGBA8, GPU_DATA_FLOAT, one); + GPU_texture_wrap_mode(g_data.dummy_zero, true, true); + GPU_texture_wrap_mode(g_data.dummy_one, true, true); + + memset(g_data.dummy_grid_mat, 0, sizeof(g_data.dummy_grid_mat)); +} + +void DRW_volume_free(void) +{ + GPU_TEXTURE_FREE_SAFE(g_data.dummy_zero); + GPU_TEXTURE_FREE_SAFE(g_data.dummy_one); +} + +static GPUTexture *grid_default_texture(eGPUDefaultValue default_value) +{ + switch (default_value) { + case GPU_DEFAULT_0: + return g_data.dummy_zero; + case GPU_DEFAULT_1: + return g_data.dummy_one; + } + return g_data.dummy_zero; +} + +void DRW_volume_init(DRWData *drw_data) +{ + if (drw_data->volume_grids_ubos == nullptr) { + drw_data->volume_grids_ubos = new VolumeUniformBufPool(); + } + VolumeUniformBufPool *pool = (VolumeUniformBufPool *)drw_data->volume_grids_ubos; + pool->reset(); + + if (g_data.dummy_one == nullptr) { + drw_volume_globals_init(); + } +} + +static DRWShadingGroup *drw_volume_object_grids_init(Object *ob, + ListBase *attrs, + DRWShadingGroup *grp) +{ + VolumeUniformBufPool *pool = (VolumeUniformBufPool *)DST.vmempool->volume_grids_ubos; + VolumeInfosBuf &volume_infos = *pool->alloc(); + + Volume *volume = (Volume *)ob->data; + BKE_volume_load(volume, G.main); + + grp = DRW_shgroup_create_sub(grp); + + volume_infos.density_scale = BKE_volume_density_scale(volume, ob->obmat); + volume_infos.color_mul = float4(1.0f); + volume_infos.temperature_mul = 1.0f; + volume_infos.temperature_bias = 0.0f; + + /* Bind volume grid textures. */ + int grid_id = 0; + LISTBASE_FOREACH (GPUMaterialAttribute *, attr, attrs) { + const VolumeGrid *volume_grid = BKE_volume_grid_find_for_read(volume, attr->name); + DRWVolumeGrid *drw_grid = (volume_grid) ? + DRW_volume_batch_cache_get_grid(volume, volume_grid) : + NULL; + + /* Handle 3 cases here: + * - Grid exists and texture was loaded -> use texture. + * - Grid exists but has zero size or failed to load -> use zero. + * - Grid does not exist -> use default value. */ + GPUTexture *grid_tex = (drw_grid) ? drw_grid->texture : + (volume_grid) ? g_data.dummy_zero : + grid_default_texture(attr->default_value); + DRW_shgroup_uniform_texture(grp, attr->input_name, grid_tex); + + copy_m4_m4(volume_infos.grids_xform[grid_id++].ptr(), drw_grid->object_to_texture); + } + + volume_infos.push_update(); + + DRW_shgroup_uniform_block(grp, "drw_volume", volume_infos); + + return grp; +} + +static DRWShadingGroup *drw_volume_object_mesh_init(Scene *scene, + Object *ob, + ListBase *attrs, + DRWShadingGroup *grp) +{ + VolumeUniformBufPool *pool = (VolumeUniformBufPool *)DST.vmempool->volume_grids_ubos; + VolumeInfosBuf &volume_infos = *pool->alloc(); + + ModifierData *md = NULL; + + volume_infos.density_scale = 1.0f; + volume_infos.color_mul = float4(1.0f); + volume_infos.temperature_mul = 1.0f; + volume_infos.temperature_bias = 0.0f; + + /* Smoke Simulation */ + if ((md = BKE_modifiers_findby_type(ob, eModifierType_Fluid)) && + (BKE_modifier_is_enabled(scene, md, eModifierMode_Realtime)) && + ((FluidModifierData *)md)->domain != NULL) { + FluidModifierData *fmd = (FluidModifierData *)md; + FluidDomainSettings *fds = fmd->domain; + + /* Don't try to show liquid domains here. */ + if (!fds->fluid || !(fds->type == FLUID_DOMAIN_TYPE_GAS)) { + return nullptr; + } + + if (fds->fluid && (fds->type == FLUID_DOMAIN_TYPE_GAS)) { + DRW_smoke_ensure(fmd, fds->flags & FLUID_DOMAIN_USE_NOISE); + } + + grp = DRW_shgroup_create_sub(grp); + + int grid_id = 0; + LISTBASE_FOREACH (GPUMaterialAttribute *, attr, attrs) { + if (STREQ(attr->name, "density")) { + DRW_shgroup_uniform_texture_ref( + grp, attr->input_name, fds->tex_density ? &fds->tex_density : &g_data.dummy_one); + } + else if (STREQ(attr->name, "color")) { + DRW_shgroup_uniform_texture_ref( + grp, attr->input_name, fds->tex_color ? &fds->tex_color : &g_data.dummy_one); + } + else if (STR_ELEM(attr->name, "flame", "temperature")) { + DRW_shgroup_uniform_texture_ref( + grp, attr->input_name, fds->tex_flame ? &fds->tex_flame : &g_data.dummy_zero); + } + else { + DRW_shgroup_uniform_texture( + grp, attr->input_name, grid_default_texture(attr->default_value)); + } + copy_m4_m4(volume_infos.grids_xform[grid_id++].ptr(), g_data.dummy_grid_mat); + } + + bool use_constant_color = ((fds->active_fields & FLUID_DOMAIN_ACTIVE_COLORS) == 0 && + (fds->active_fields & FLUID_DOMAIN_ACTIVE_COLOR_SET) != 0); + if (use_constant_color) { + volume_infos.color_mul = float4(UNPACK3(fds->active_color), 1.0f); + } + + /* Output is such that 0..1 maps to 0..1000K */ + volume_infos.temperature_mul = fds->flame_max_temp - fds->flame_ignition; + volume_infos.temperature_bias = fds->flame_ignition; + } + else { + grp = DRW_shgroup_create_sub(grp); + + int grid_id = 0; + LISTBASE_FOREACH (GPUMaterialAttribute *, attr, attrs) { + DRW_shgroup_uniform_texture( + grp, attr->input_name, grid_default_texture(attr->default_value)); + copy_m4_m4(volume_infos.grids_xform[grid_id++].ptr(), g_data.dummy_grid_mat); + } + } + + volume_infos.push_update(); + + DRW_shgroup_uniform_block(grp, "drw_volume", volume_infos); + + return grp; +} + +static DRWShadingGroup *drw_volume_world_grids_init(ListBase *attrs, DRWShadingGroup *grp) +{ + /* Bind default volume grid textures. */ + int grid_id = 0; + LISTBASE_FOREACH (GPUMaterialAttribute *, attr, attrs) { + DRW_shgroup_uniform_texture(grp, attr->input_name, grid_default_texture(attr->default_value)); + } + return grp; +} + +DRWShadingGroup *DRW_shgroup_volume_create_sub(Scene *scene, + Object *ob, + DRWShadingGroup *shgrp, + GPUMaterial *gpu_material) +{ + ListBase attrs = GPU_material_attributes(gpu_material); + + if (ob == nullptr) { + return drw_volume_world_grids_init(&attrs, shgrp); + } + else if (ob->type == OB_VOLUME) { + return drw_volume_object_grids_init(ob, &attrs, shgrp); + } + else { + return drw_volume_object_mesh_init(scene, ob, &attrs, shgrp); + } +} |