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Diffstat (limited to 'source/blender/gpu/intern/gpu_batch_presets.c')
| -rw-r--r-- | source/blender/gpu/intern/gpu_batch_presets.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_batch_presets.c b/source/blender/gpu/intern/gpu_batch_presets.c new file mode 100644 index 00000000000..9db04832a51 --- /dev/null +++ b/source/blender/gpu/intern/gpu_batch_presets.c @@ -0,0 +1,200 @@ +/* + * ***** BEGIN GPL LICENSE BLOCK ***** + * + * 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. + * + * The Original Code is Copyright (C) 2016 Blender Foundation. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): Mike Erwin + * + * ***** END GPL LICENSE BLOCK ***** + */ + +/** \file blender/gpu/intern/gpu_batch_presets.c + * \ingroup gpu + */ + +#include "BLI_utildefines.h" +#include "BLI_math.h" + +#include "GPU_batch.h" +#include "gpu_shader_private.h" + +/* Struct to store 3D Batches and their format */ +static struct { + struct { + Gwn_Batch *sphere_high; + Gwn_Batch *sphere_med; + Gwn_Batch *sphere_low; + Gwn_Batch *sphere_wire_low; + Gwn_Batch *sphere_wire_med; + } batch; + + Gwn_VertFormat format; + + struct { + uint pos, nor; + } attr_id; +} g_presets_3d = {0}; + +/* We may want 2D presets later. */ + +/* -------------------------------------------------------------------- */ +/** \name 3D Primitives + * \{ */ + +static void batch_sphere_lat_lon_vert( + Gwn_VertBufRaw *pos_step, Gwn_VertBufRaw *nor_step, + float lat, float lon) +{ + float pos[3]; + pos[0] = sinf(lat) * cosf(lon); + pos[1] = cosf(lat); + pos[2] = sinf(lat) * sinf(lon); + copy_v3_v3(GWN_vertbuf_raw_step(pos_step), pos); + copy_v3_v3(GWN_vertbuf_raw_step(nor_step), pos); +} + +/* Replacement for gluSphere */ +static Gwn_Batch *batch_sphere(int lat_res, int lon_res) +{ + const float lon_inc = 2 * M_PI / lon_res; + const float lat_inc = M_PI / lat_res; + float lon, lat; + + Gwn_VertBuf *vbo = GWN_vertbuf_create_with_format(&g_presets_3d.format); + const uint vbo_len = (lat_res - 1) * lon_res * 6; + GWN_vertbuf_data_alloc(vbo, vbo_len); + + Gwn_VertBufRaw pos_step, nor_step; + GWN_vertbuf_attr_get_raw_data(vbo, g_presets_3d.attr_id.pos, &pos_step); + GWN_vertbuf_attr_get_raw_data(vbo, g_presets_3d.attr_id.nor, &nor_step); + + lon = 0.0f; + for (int i = 0; i < lon_res; i++, lon += lon_inc) { + lat = 0.0f; + for (int j = 0; j < lat_res; j++, lat += lat_inc) { + if (j != lat_res - 1) { /* Pole */ + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat + lat_inc, lon + lon_inc); + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat + lat_inc, lon); + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat, lon); + } + + if (j != 0) { /* Pole */ + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat, lon + lon_inc); + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat + lat_inc, lon + lon_inc); + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat, lon); + } + } + } + + BLI_assert(vbo_len == GWN_vertbuf_raw_used(&pos_step)); + BLI_assert(vbo_len == GWN_vertbuf_raw_used(&nor_step)); + + return GWN_batch_create_ex(GWN_PRIM_TRIS, vbo, NULL, GWN_BATCH_OWNS_VBO); +} + +static Gwn_Batch *batch_sphere_wire(int lat_res, int lon_res) +{ + const float lon_inc = 2 * M_PI / lon_res; + const float lat_inc = M_PI / lat_res; + float lon, lat; + + Gwn_VertBuf *vbo = GWN_vertbuf_create_with_format(&g_presets_3d.format); + const uint vbo_len = (lat_res * lon_res * 2) + ((lat_res - 1) * lon_res * 2); + GWN_vertbuf_data_alloc(vbo, vbo_len); + + Gwn_VertBufRaw pos_step, nor_step; + GWN_vertbuf_attr_get_raw_data(vbo, g_presets_3d.attr_id.pos, &pos_step); + GWN_vertbuf_attr_get_raw_data(vbo, g_presets_3d.attr_id.nor, &nor_step); + + lon = 0.0f; + for (int i = 0; i < lon_res; i++, lon += lon_inc) { + lat = 0.0f; + for (int j = 0; j < lat_res; j++, lat += lat_inc) { + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat + lat_inc, lon); + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat, lon); + + if (j != lat_res - 1) { /* Pole */ + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat + lat_inc, lon + lon_inc); + batch_sphere_lat_lon_vert(&pos_step, &nor_step, lat + lat_inc, lon); + } + } + } + + BLI_assert(vbo_len == GWN_vertbuf_raw_used(&pos_step)); + BLI_assert(vbo_len == GWN_vertbuf_raw_used(&nor_step)); + + return GWN_batch_create_ex(GWN_PRIM_LINES, vbo, NULL, GWN_BATCH_OWNS_VBO); +} + +Gwn_Batch *GPU_batch_preset_sphere(int lod) +{ + BLI_assert(lod >= 0 && lod <= 2); + + if (lod == 0) { + return g_presets_3d.batch.sphere_low; + } + else if (lod == 1) { + return g_presets_3d.batch.sphere_med; + } + else { + return g_presets_3d.batch.sphere_high; + } +} + +Gwn_Batch *GPU_batch_preset_sphere_wire(int lod) +{ + BLI_assert(lod >= 0 && lod <= 1); + + if (lod == 0) { + return g_presets_3d.batch.sphere_wire_low; + } + else { + return g_presets_3d.batch.sphere_wire_med; + } +} + +/** \} */ + + +void gpu_batch_presets_init(void) +{ + if (g_presets_3d.format.attrib_ct == 0) { + Gwn_VertFormat *format = &g_presets_3d.format; + g_presets_3d.attr_id.pos = GWN_vertformat_attr_add(format, "pos", GWN_COMP_F32, 3, GWN_FETCH_FLOAT); + g_presets_3d.attr_id.nor = GWN_vertformat_attr_add(format, "nor", GWN_COMP_F32, 3, GWN_FETCH_FLOAT); + } + + /* Hard coded resolution */ + g_presets_3d.batch.sphere_low = batch_sphere(8, 16); + g_presets_3d.batch.sphere_med = batch_sphere(16, 10); + g_presets_3d.batch.sphere_high = batch_sphere(32, 24); + + g_presets_3d.batch.sphere_wire_low = batch_sphere_wire(6, 8); + g_presets_3d.batch.sphere_wire_med = batch_sphere_wire(8, 16); +} + +void gpu_batch_presets_exit(void) +{ + GWN_batch_discard(g_presets_3d.batch.sphere_low); + GWN_batch_discard(g_presets_3d.batch.sphere_med); + GWN_batch_discard(g_presets_3d.batch.sphere_high); + GWN_batch_discard(g_presets_3d.batch.sphere_wire_low); + GWN_batch_discard(g_presets_3d.batch.sphere_wire_med); +} |