[retroray] / src / scr_mod.c

/*
RetroRay - integrated standalone vintage modeller/renderer
Copyright (C) 2023  John Tsiombikas <nuclear@mutantstargoat.com>

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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include "gaw/gaw.h"
#include "app.h"
#include "rtk.h"

enum {
        TBN_NEW, TBN_OPEN, TBN_SAVE, TBN_SEP1,
        TBN_SEL, TBN_MOVE, TBL_ROT, TBN_SCALE, TBN_SEP2,
        TBL_ADD, TBL_RM, TBN_SEP3,
        TBN_MTL, TBN_REND, TBL_VIEWREND, TBN_SEP4, TBL_CFG,

        NUM_TOOL_BUTTONS
};
static const char *tbn_icon_name[] = {
        "new", "open", "save", 0,
        "sel", "move", "rot", "scale", 0,
        "add", "remove", 0,
        "mtl", "rend", "viewrend", 0, "cfg"
};
static int tbn_icon_pos[][2] = {
        {0,0}, {16,0}, {32,0}, {-1,-1},
        {48,0}, {64,0}, {80,0}, {96,0}, {-1,-1},
        {112,0}, {112,16}, {-1,-1},
        {48,16}, {64,16}, {80,16}, {-1,-1}, {96,16}
};
static rtk_icon *tbn_icons[NUM_TOOL_BUTTONS];

#define TOOLBAR_HEIGHT  26


static int mdl_init(void);
static void mdl_destroy(void);
static int mdl_start(void);
static void mdl_stop(void);
static void mdl_display(void);
static void mdl_reshape(int x, int y);
static void mdl_keyb(int key, int press);
static void mdl_mouse(int bn, int press, int x, int y);
static void mdl_motion(int x, int y);

static void draw_grid(void);


struct app_screen scr_model = {
        "modeller",
        mdl_init, mdl_destroy,
        mdl_start, mdl_stop,
        mdl_display, mdl_reshape,
        mdl_keyb, mdl_mouse, mdl_motion
};

static rtk_widget *toolbar;
static rtk_iconsheet *icons;

static float cam_theta, cam_phi = 20, cam_dist = 8;


static int mdl_init(void)
{
        int i;
        rtk_widget *w;

        if(!(icons = rtk_load_iconsheet("data/icons.png"))) {
                errormsg("failed to load iconsheet\n");
                return -1;
        }
        for(i=0; i<NUM_TOOL_BUTTONS; i++) {
                if(tbn_icon_name[i]) {
                        tbn_icons[i] = rtk_define_icon(icons, tbn_icon_name[i],
                                        tbn_icon_pos[i][0], tbn_icon_pos[i][1], 16, 16);
                } else {
                        tbn_icons[i] = 0;
                }
        }

        if(!(toolbar = rtk_create_window(0, "toolbar", 0, 0, win_width, TOOLBAR_HEIGHT))) {
                return -1;
        }
        rtk_win_layout(toolbar, RTK_HBOX);

        for(i=0; i<NUM_TOOL_BUTTONS; i++) {
                if(!tbn_icons[i]) {
                        rtk_create_separator(toolbar);
                } else {
                        if(!(w = rtk_create_iconbutton(toolbar, tbn_icons[i], 0))) {
                                return -1;
                        }
                }
        }
        return 0;
}

static void mdl_destroy(void)
{
        rtk_free_iconsheet(icons);
}

static int mdl_start(void)
{
        gaw_clear_color(0.125, 0.125, 0.125, 1);
        return 0;
}

static void mdl_stop(void)
{
}

static void mdl_display(void)
{
        gaw_clear(GAW_COLORBUF | GAW_DEPTHBUF);

        rtk_draw_widget(toolbar);

        gaw_viewport(0, TOOLBAR_HEIGHT, win_width, win_height - TOOLBAR_HEIGHT);

        gaw_matrix_mode(GAW_MODELVIEW);
        gaw_load_identity();
        gaw_translate(0, 0, -cam_dist);
        gaw_rotate(cam_phi, 1, 0, 0);
        gaw_rotate(cam_theta, 0, 1, 0);

        draw_grid();

        gaw_begin(GAW_QUADS);
        gaw_color3f(1, 0, 0);
        gaw_vertex2f(-1, -1);
        gaw_color3f(0, 1, 0);
        gaw_vertex2f(1, -1);
        gaw_color3f(0, 0, 1);
        gaw_vertex2f(1, 1);
        gaw_color3f(1, 1, 0);
        gaw_vertex2f(-1, 1);
        gaw_end();

        gaw_viewport(0, 0, win_width, win_height);
}

static void draw_grid(void)
{
        gaw_begin(GAW_LINES);
        gaw_color3f(0.5, 0, 0);
        gaw_vertex4f(0, 0, 0, 1);
        gaw_vertex4f(-1, 0, 0, 0);
        gaw_vertex4f(0, 0, 0, 1);
        gaw_vertex4f(1, 0, 0, 0);
        gaw_color3f(0, 0.5, 0);
        gaw_vertex4f(0, 0, 0, 1);
        gaw_vertex4f(0, 0, -1, 0);
        gaw_vertex4f(0, 0, 0, 1);
        gaw_vertex4f(0, 0, 1, 0);
        gaw_end();
}

static void mdl_reshape(int x, int y)
{
        float aspect = (float)x / (float)(y - TOOLBAR_HEIGHT);

        gaw_matrix_mode(GAW_PROJECTION);
        gaw_load_identity();
        gaw_perspective(50, aspect, 0.5, 100.0);

        rtk_resize(toolbar, win_width, TOOLBAR_HEIGHT);
}

static void mdl_keyb(int key, int press)
{
}

static void mdl_mouse(int bn, int press, int x, int y)
{
}

static void mdl_motion(int x, int y)
{
        int dx = x - mouse_x;
        int dy = y - mouse_y;

        if((dx | dy) == 0) return;

        if(mouse_state[0]) {
                cam_theta += dx * 0.5f;
                cam_phi += dy * 0.5f;
                if(cam_phi < -90) cam_phi = -90;
                if(cam_phi > 90) cam_phi = 90;
                app_redisplay();
        }

        if(mouse_state[2]) {
                cam_dist += dy * 0.1f;
                if(cam_dist < 0) cam_dist = 0;
                app_redisplay();
        }
}