163 lines
6.4 KiB
C
163 lines
6.4 KiB
C
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/*
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* Gem-graph
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*
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* Desc: OpenGL grid functions
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*
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* Copyright (C) 2023 Jean Sirmai <jean@a-lec.org>
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* Copyright (C) 2023 Adrien Bourmault <neox@a-lec.org>
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*
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* This file is part of Gem-graph.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <time.h>
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#include "base.h"
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//#include "ui.h"
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#include "graphics.h"
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int draw_space_ridges_vertex (const int stack_id,
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long offset_vertex,
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long x,
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long y,
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long z)
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{
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GLfloat max = fmax(x, y); max = fmax(max, z);
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graphics_draw_vertex (stack_id, offset_vertex - x / max, offset_vertex - y / max, - z / max);
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graphics_draw_vertex (stack_id, offset_vertex + x / max, offset_vertex - y / max, - z / max);
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graphics_draw_vertex (stack_id, offset_vertex - x / max, offset_vertex + y / max, - z / max);
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graphics_draw_vertex (stack_id, offset_vertex - x / max, offset_vertex - y / max, + z / max);
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graphics_draw_vertex (stack_id, offset_vertex + x / max, offset_vertex + y / max, - z / max);
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graphics_draw_vertex (stack_id, offset_vertex + x / max, offset_vertex - y / max, + z / max);
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graphics_draw_vertex (stack_id, offset_vertex - x / max, offset_vertex + y / max, + z / max);
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graphics_draw_vertex (stack_id, offset_vertex + x / max, + y / max, + z / max);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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graphics_draw_color (stack_id, 0.8f, 0.6f, 0.5f);
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return 8;
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}
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int draw_space_ridges_lines (const int stack_id)
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{
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graphics_draw_line (stack_id, 0, 1); graphics_draw_line (stack_id, 7, 4);
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graphics_draw_line (stack_id, 0, 2); graphics_draw_line (stack_id, 7, 5);
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graphics_draw_line (stack_id, 0, 3); graphics_draw_line (stack_id, 7, 6);
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graphics_draw_line (stack_id, 1, 4); graphics_draw_line (stack_id, 2, 4);
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graphics_draw_line (stack_id, 1, 5); graphics_draw_line (stack_id, 3, 5);
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graphics_draw_line (stack_id, 2, 6); graphics_draw_line (stack_id, 3, 6);
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return 12;
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}
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long draw_grids_on_space_faces_vertex (const int stack_id,
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long x,
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long y,
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long z)
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{
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float i, max = fmax(x, y); max = fmax(max, z);
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for (i = 1; i < x; i++) {
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graphics_draw_vertex (stack_id, (2 * i / x - 1) * x / max, - y / max, - z / max);
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graphics_draw_vertex (stack_id, (2 * i / x - 1) * x / max, - y / max, z / max);
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graphics_draw_vertex (stack_id, (2 * i / x - 1) * x / max, y / max, z / max);
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graphics_draw_vertex (stack_id, (2 * i / x - 1) * x / max, y / max, - z / max);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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}
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/* offset_vertex += (x - 1) * 4; */ /* offset_colors += (x - 1) * 4; */
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for (i = 1; i < y; i++) {
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graphics_draw_vertex (stack_id, - x / max, (2 * i / y - 1) * y / max, - z / max);
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graphics_draw_vertex (stack_id, - x / max, (2 * i / y - 1) * y / max, z / max);
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graphics_draw_vertex (stack_id, x / max, (2 * i / y - 1) * y / max, z / max);
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graphics_draw_vertex (stack_id, x / max, (2 * i / y - 1) * y / max, - z / max);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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}
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/* offset_vertex += (y - 1) * 4; */ /* offset_colors += (y - 1) * 4; */
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for (i = 1; i < z; i++) {
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graphics_draw_vertex (stack_id, - x / max, - y / max, (2 * i / z - 1) * z / max);
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graphics_draw_vertex (stack_id, - x / max, y / max, (2 * i / z - 1) * z / max);
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graphics_draw_vertex (stack_id, x / max, y / max, (2 * i / z - 1) * z / max);
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graphics_draw_vertex (stack_id, x / max, - y / max, (2 * i / z - 1) * z / max);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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graphics_draw_color (stack_id, 0.55f, 0.55f, 0.55f);
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}
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return (x + y + z - 3) * 3;
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}
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long draw_grids_on_space_faces_lines (const int stack_id,
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long offset_vertex,
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long x,
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long y,
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long z)
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{
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offset_vertex = offset_vertex / 3;
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for (int i = 0; i < x - 1; i ++) {
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graphics_draw_line (stack_id, offset_vertex + i * 4 + 1, offset_vertex + i * 4 + 2);
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graphics_draw_line (stack_id, offset_vertex + i * 4 + 2, offset_vertex + i * 4 + 3);
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}
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offset_vertex += (x - 1) * 4;
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for (int i = 0; i < y - 1; i ++) {
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graphics_draw_line (stack_id, offset_vertex + i * 4 + 2, offset_vertex + i * 4 + 3);
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graphics_draw_line (stack_id, offset_vertex + i * 4 + 3, offset_vertex + i * 4 + 0);
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}
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offset_vertex += (y - 1) * 4;
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for (int i = 0; i < z - 1; i ++) {
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graphics_draw_line (stack_id, offset_vertex + i * 4 + 0, offset_vertex + i * 4 + 1);
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graphics_draw_line (stack_id, offset_vertex + i * 4 + 3, offset_vertex + i * 4 + 0);
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}
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return (x + y + z - 3) * 4;
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}
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