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annotate src/app.cc @ 5:2b7ae76c173f

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windows port
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 18 Dec 2015 03:47:10 +0200
parents 9f75208b81cd
children 6e980fddbf3b
rev   line source
nuclear@0 1 #include <stdlib.h>
nuclear@0 2 #include <float.h>
nuclear@2 3 #include <assert.h>
nuclear@0 4 #include <vector>
nuclear@0 5 #include <algorithm>
nuclear@0 6 #include "opengl.h"
nuclear@0 7 #include "app.h"
nuclear@0 8 #include "curve.h"
nuclear@0 9 #include "widgets.h"
nuclear@0 10
nuclear@3 11 enum SnapMode {
nuclear@3 12 SNAP_NONE,
nuclear@3 13 SNAP_GRID,
nuclear@3 14 SNAP_POINT
nuclear@3 15 };
nuclear@3 16
nuclear@1 17 int win_width, win_height;
nuclear@1 18 float win_aspect;
nuclear@1 19
nuclear@0 20 static void draw_grid(float sz, float sep, float alpha = 1.0f);
nuclear@0 21 static void draw_curve(const Curve *curve);
nuclear@0 22 static void on_click(int bn, float u, float v);
nuclear@0 23
nuclear@2 24 // viewport control
nuclear@2 25 static Vector2 view_pan;
nuclear@3 26 static float view_scale = 0.2f;
nuclear@3 27 static Matrix4x4 view_matrix;
nuclear@3 28
nuclear@3 29 static float grid_size = 1.0;
nuclear@3 30 static SnapMode snap_mode;
nuclear@0 31
nuclear@0 32 static std::vector<Curve*> curves;
nuclear@2 33 static Curve *sel_curve; // selected curve being edited
nuclear@2 34 static Curve *new_curve; // new curve being entered
nuclear@2 35 static Curve *hover_curve; // curve the mouse is hovering over (click to select)
nuclear@2 36 static int sel_pidx = -1; // selected point of the selected or hovered-over curve
nuclear@0 37
nuclear@2 38 static Label *weight_label; // floating label for the cp weight
nuclear@0 39
nuclear@3 40 #ifdef DRAW_MOUSE_POINTER
nuclear@3 41 static Vector2 mouse_pointer;
nuclear@3 42 #endif
nuclear@3 43
nuclear@0 44
nuclear@0 45 bool app_init(int argc, char **argv)
nuclear@0 46 {
nuclear@5 47 glewInit();
nuclear@5 48
nuclear@0 49 glEnable(GL_MULTISAMPLE);
nuclear@0 50 glEnable(GL_CULL_FACE);
nuclear@2 51
nuclear@2 52 glEnable(GL_BLEND);
nuclear@2 53 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
nuclear@0 54 return true;
nuclear@0 55 }
nuclear@0 56
nuclear@0 57 void app_cleanup()
nuclear@0 58 {
nuclear@0 59 for(size_t i=0; i<curves.size(); i++) {
nuclear@0 60 delete curves[i];
nuclear@0 61 }
nuclear@0 62 curves.clear();
nuclear@0 63 }
nuclear@0 64
nuclear@0 65 void app_draw()
nuclear@0 66 {
nuclear@1 67 glClearColor(0.1, 0.1, 0.1, 1);
nuclear@0 68 glClear(GL_COLOR_BUFFER_BIT);
nuclear@0 69
nuclear@0 70 glMatrixMode(GL_MODELVIEW);
nuclear@0 71 glLoadIdentity();
nuclear@3 72 glTranslatef(view_pan.x * view_scale, view_pan.y * view_scale, 0);
nuclear@0 73 glScalef(view_scale, view_scale, view_scale);
nuclear@0 74
nuclear@3 75 float max_aspect = std::max(win_aspect, 1.0f / win_aspect);
nuclear@3 76 draw_grid(max_aspect, grid_size);
nuclear@0 77
nuclear@0 78 for(size_t i=0; i<curves.size(); i++) {
nuclear@0 79 draw_curve(curves[i]);
nuclear@0 80 }
nuclear@0 81 if(new_curve) {
nuclear@0 82 draw_curve(new_curve);
nuclear@0 83 }
nuclear@3 84
nuclear@3 85 #ifdef DRAW_MOUSE_POINTER
nuclear@3 86 glPointSize(6.0);
nuclear@3 87 glBegin(GL_POINTS);
nuclear@3 88 glColor3f(0, 0, 1);
nuclear@3 89 glVertex2f(mouse_pointer.x, mouse_pointer.y);
nuclear@3 90 glEnd();
nuclear@3 91 #endif
nuclear@4 92
nuclear@4 93 glMatrixMode(GL_MODELVIEW);
nuclear@4 94 glLoadIdentity();
nuclear@4 95
nuclear@4 96 if(weight_label) {
nuclear@4 97 weight_label->draw();
nuclear@4 98 }
nuclear@0 99 }
nuclear@0 100
nuclear@0 101 static void draw_grid(float sz, float sep, float alpha)
nuclear@0 102 {
nuclear@0 103 float x = 0.0f;
nuclear@3 104 float s = 1.0 / view_scale;
nuclear@3 105
nuclear@3 106 sz *= s;
nuclear@3 107 sz += sep; // one more step for when we have non-zero fractional pan
nuclear@3 108 float end = std::min(sz, 100.0f * sep);
nuclear@3 109
nuclear@3 110 // fractional pan
nuclear@3 111 Vector2 pan = view_pan;
nuclear@3 112 Vector2 fpan = Vector2(fmod(pan.x, sep), fmod(pan.y, sep));
nuclear@3 113 Vector2 offset = fpan - pan;
nuclear@3 114
nuclear@3 115 glMatrixMode(GL_MODELVIEW);
nuclear@3 116 glPushMatrix();
nuclear@3 117 glTranslatef(offset.x, offset.y, 0);
nuclear@3 118
nuclear@3 119 glBegin(GL_LINES);
nuclear@3 120 glColor4f(0.35, 0.35, 0.35, alpha);
nuclear@3 121 while(x <= end) {
nuclear@3 122 glVertex2f(-end, x);
nuclear@3 123 glVertex2f(end, x);
nuclear@3 124 glVertex2f(-end, -x);
nuclear@3 125 glVertex2f(end, -x);
nuclear@3 126 glVertex2f(x, -end);
nuclear@3 127 glVertex2f(x, end);
nuclear@3 128 glVertex2f(-x, -end);
nuclear@3 129 glVertex2f(-x, end);
nuclear@3 130 x += sep;
nuclear@3 131 }
nuclear@3 132 glEnd();
nuclear@3 133 glPopMatrix();
nuclear@3 134
nuclear@0 135
nuclear@0 136 glLineWidth(1.0);
nuclear@0 137 glBegin(GL_LINES);
nuclear@0 138 glColor4f(0.6, 0.3, 0.2, alpha);
nuclear@3 139 glVertex2f(-sz + offset.x, 0);
nuclear@3 140 glVertex2f(sz + offset.x, 0);
nuclear@0 141 glColor4f(0.2, 0.3, 0.6, alpha);
nuclear@3 142 glVertex2f(0, -sz + offset.y);
nuclear@3 143 glVertex2f(0, sz + offset.y);
nuclear@0 144 glEnd();
nuclear@3 145
nuclear@0 146 }
nuclear@0 147
nuclear@0 148 static void draw_curve(const Curve *curve)
nuclear@0 149 {
nuclear@2 150 int numpt = curve->size();
nuclear@2 151 int segm = numpt * 16;
nuclear@0 152
nuclear@2 153 glLineWidth(curve == hover_curve ? 4.0 : 2.0);
nuclear@1 154 if(curve == sel_curve) {
nuclear@1 155 glColor3f(0.3, 0.4, 1.0);
nuclear@1 156 } else if(curve == new_curve) {
nuclear@1 157 glColor3f(1.0, 0.75, 0.3);
nuclear@1 158 } else {
nuclear@2 159 glColor3f(0.6, 0.6, 0.6);
nuclear@1 160 }
nuclear@0 161 glBegin(GL_LINE_STRIP);
nuclear@0 162 for(int i=0; i<segm; i++) {
nuclear@0 163 float t = (float)i / (float)(segm - 1);
nuclear@0 164 Vector2 v = curve->interpolate(t);
nuclear@0 165 glVertex2f(v.x, v.y);
nuclear@0 166 }
nuclear@0 167 glEnd();
nuclear@0 168 glLineWidth(1.0);
nuclear@0 169
nuclear@2 170 glPointSize(curve == hover_curve ? 10.0 : 7.0);
nuclear@0 171 glBegin(GL_POINTS);
nuclear@1 172 if(curve == new_curve) {
nuclear@1 173 glColor3f(1.0, 0.0, 0.0);
nuclear@1 174 } else {
nuclear@1 175 glColor3f(0.6, 0.3, 0.2);
nuclear@1 176 }
nuclear@0 177 for(int i=0; i<numpt; i++) {
nuclear@1 178 if(curve == sel_curve) {
nuclear@1 179 if(i == sel_pidx) {
nuclear@1 180 glColor3f(1.0, 0.2, 0.1);
nuclear@1 181 } else {
nuclear@1 182 glColor3f(0.2, 1.0, 0.2);
nuclear@1 183 }
nuclear@1 184 }
nuclear@0 185 Vector2 pt = curve->get_point(i);
nuclear@0 186 glVertex2f(pt.x, pt.y);
nuclear@0 187 }
nuclear@0 188 glEnd();
nuclear@0 189 glPointSize(1.0);
nuclear@0 190 }
nuclear@0 191
nuclear@0 192 void app_reshape(int x, int y)
nuclear@0 193 {
nuclear@0 194 win_width = x;
nuclear@0 195 win_height = y;
nuclear@0 196 win_aspect = (float)x / (float)y;
nuclear@0 197
nuclear@0 198 glViewport(0, 0, x, y);
nuclear@0 199 glMatrixMode(GL_PROJECTION);
nuclear@0 200 glLoadIdentity();
nuclear@0 201 glOrtho(-win_aspect, win_aspect, -1, 1, -1, 1);
nuclear@0 202 }
nuclear@0 203
nuclear@0 204 void app_keyboard(int key, bool pressed)
nuclear@0 205 {
nuclear@0 206 if(pressed) {
nuclear@0 207 switch(key) {
nuclear@1 208 case 'q':
nuclear@1 209 case 'Q':
nuclear@1 210 exit(0);
nuclear@1 211
nuclear@0 212 case 27:
nuclear@1 213 if(new_curve) {
nuclear@1 214 delete new_curve;
nuclear@1 215 new_curve = 0;
nuclear@1 216 post_redisplay();
nuclear@1 217 }
nuclear@1 218 break;
nuclear@0 219
nuclear@0 220 case 'l':
nuclear@0 221 case 'L':
nuclear@0 222 if(sel_curve) {
nuclear@0 223 sel_curve->set_type(CURVE_LINEAR);
nuclear@0 224 post_redisplay();
nuclear@0 225 }
nuclear@1 226 if(new_curve) {
nuclear@1 227 new_curve->set_type(CURVE_LINEAR);
nuclear@1 228 post_redisplay();
nuclear@1 229 }
nuclear@0 230 break;
nuclear@0 231
nuclear@0 232 case 'b':
nuclear@0 233 case 'B':
nuclear@0 234 if(sel_curve) {
nuclear@0 235 sel_curve->set_type(CURVE_BSPLINE);
nuclear@0 236 post_redisplay();
nuclear@0 237 }
nuclear@1 238 if(new_curve) {
nuclear@1 239 new_curve->set_type(CURVE_BSPLINE);
nuclear@1 240 post_redisplay();
nuclear@1 241 }
nuclear@0 242 break;
nuclear@0 243
nuclear@0 244 case 'h':
nuclear@0 245 case 'H':
nuclear@0 246 if(sel_curve) {
nuclear@0 247 sel_curve->set_type(CURVE_HERMITE);
nuclear@0 248 post_redisplay();
nuclear@0 249 }
nuclear@1 250 if(new_curve) {
nuclear@1 251 new_curve->set_type(CURVE_HERMITE);
nuclear@1 252 post_redisplay();
nuclear@1 253 }
nuclear@0 254 break;
nuclear@0 255 }
nuclear@0 256 }
nuclear@3 257
nuclear@3 258
nuclear@3 259 switch(key) {
nuclear@3 260 case 's':
nuclear@3 261 snap_mode = pressed ? SNAP_GRID : SNAP_NONE;
nuclear@3 262 break;
nuclear@3 263
nuclear@3 264 case 'S':
nuclear@3 265 snap_mode = pressed ? SNAP_POINT : SNAP_NONE;
nuclear@3 266 break;
nuclear@3 267
nuclear@3 268 default:
nuclear@3 269 break;
nuclear@3 270 }
nuclear@3 271 }
nuclear@3 272
nuclear@3 273 static void calc_view_matrix()
nuclear@3 274 {
nuclear@3 275 view_matrix.reset_identity();
nuclear@3 276 view_matrix.scale(Vector3(view_scale, view_scale, view_scale));
nuclear@3 277 view_matrix.translate(Vector3(view_pan.x, view_pan.y, 0.0));
nuclear@0 278 }
nuclear@0 279
nuclear@0 280 static Vector2 pixel_to_uv(int x, int y)
nuclear@0 281 {
nuclear@0 282 float u = win_aspect * (2.0 * (float)x / (float)win_width - 1.0);
nuclear@0 283 float v = 1.0 - 2.0 * (float)y / (float)win_height;
nuclear@3 284
nuclear@3 285 u = u / view_scale - view_pan.x;
nuclear@3 286 v = v / view_scale - view_pan.y;
nuclear@0 287 return Vector2(u, v);
nuclear@3 288 /*
nuclear@3 289 Matrix4x4 inv_view_matrix = view_matrix.inverse();
nuclear@3 290 Vector4 res = Vector4(u, v, 0.0, 1.0).transformed(inv_view_matrix);
nuclear@3 291
nuclear@3 292 return Vector2(res.x, res.y);
nuclear@3 293 */
nuclear@0 294 }
nuclear@0 295
nuclear@0 296 static int prev_x, prev_y;
nuclear@0 297 static int click_pos[8][2];
nuclear@0 298 static unsigned int bnstate;
nuclear@0 299
nuclear@0 300 #define BNBIT(x) (1 << (x))
nuclear@0 301
nuclear@0 302 void app_mouse_button(int bn, bool pressed, int x, int y)
nuclear@0 303 {
nuclear@0 304 prev_x = x;
nuclear@0 305 prev_y = y;
nuclear@0 306 if(pressed) {
nuclear@0 307 bnstate |= BNBIT(bn);
nuclear@0 308 } else {
nuclear@0 309 bnstate &= ~BNBIT(bn);
nuclear@0 310 }
nuclear@0 311
nuclear@0 312 if(pressed) {
nuclear@0 313 click_pos[bn][0] = x;
nuclear@0 314 click_pos[bn][1] = y;
nuclear@0 315 } else {
nuclear@0 316 int dx = x - click_pos[bn][0];
nuclear@0 317 int dy = y - click_pos[bn][1];
nuclear@0 318
nuclear@0 319 if(abs(dx) + abs(dy) < 3) {
nuclear@0 320 Vector2 uv = pixel_to_uv(x, y);
nuclear@0 321 on_click(bn, uv.x, uv.y);
nuclear@0 322 }
nuclear@0 323
nuclear@0 324 if(!(bnstate & BNBIT(2))) {
nuclear@0 325 delete weight_label;
nuclear@0 326 weight_label = 0;
nuclear@0 327 post_redisplay();
nuclear@0 328 }
nuclear@0 329 }
nuclear@0 330 }
nuclear@0 331
nuclear@2 332 static bool point_hit_test(const Vector2 &pos, Curve **curveret, int *pidxret)
nuclear@0 333 {
nuclear@3 334 float thres = 0.02 / view_scale;
nuclear@0 335
nuclear@0 336 for(size_t i=0; i<curves.size(); i++) {
nuclear@2 337 int pidx = curves[i]->nearest_point(pos);
nuclear@0 338 if(pidx == -1) continue;
nuclear@0 339
nuclear@0 340 Vector2 cp = curves[i]->get_point(pidx);
nuclear@2 341 if((cp - pos).length_sq() < thres * thres) {
nuclear@2 342 *curveret = curves[i];
nuclear@2 343 *pidxret = pidx;
nuclear@2 344 return true;
nuclear@0 345 }
nuclear@0 346 }
nuclear@2 347 *curveret = 0;
nuclear@2 348 *pidxret = -1;
nuclear@2 349 return false;
nuclear@0 350 }
nuclear@0 351
nuclear@3 352 static Vector2 snap(const Vector2 &p)
nuclear@3 353 {
nuclear@3 354 switch(snap_mode) {
nuclear@3 355 case SNAP_GRID:
nuclear@3 356 return Vector2(round(p.x / grid_size) * grid_size, round(p.y / grid_size) * grid_size);
nuclear@3 357 case SNAP_POINT:
nuclear@3 358 // TODO
nuclear@3 359 default:
nuclear@3 360 break;
nuclear@3 361 }
nuclear@3 362 return p;
nuclear@3 363 }
nuclear@3 364
nuclear@0 365 void app_mouse_motion(int x, int y)
nuclear@0 366 {
nuclear@3 367 Vector2 prev_uv = pixel_to_uv(prev_x, prev_y);
nuclear@3 368
nuclear@0 369 int dx = x - prev_x;
nuclear@0 370 int dy = y - prev_y;
nuclear@0 371 prev_x = x;
nuclear@0 372 prev_y = y;
nuclear@0 373
nuclear@0 374 if(!dx && !dy) return;
nuclear@0 375
nuclear@2 376 Vector2 uv = pixel_to_uv(x, y);
nuclear@3 377 #ifdef DRAW_MOUSE_POINTER
nuclear@3 378 mouse_pointer = uv;
nuclear@3 379 post_redisplay();
nuclear@3 380 #endif
nuclear@2 381
nuclear@2 382 /* when entering a new curve, have the last (extra) point following
nuclear@2 383 * the mouse until it's entered by a click (see on_click).
nuclear@2 384 */
nuclear@3 385 if(new_curve) {
nuclear@3 386 new_curve->move_point(new_curve->size() - 1, snap(uv));
nuclear@2 387 post_redisplay();
nuclear@2 388 }
nuclear@2 389
nuclear@4 390 if(!new_curve && !bnstate) {
nuclear@3 391 // not dragging, highlight curve under mouse
nuclear@2 392 point_hit_test(uv, &hover_curve, &sel_pidx);
nuclear@0 393 post_redisplay();
nuclear@0 394
nuclear@3 395 } else {
nuclear@3 396 // we're dragging with one or more buttons held down
nuclear@0 397
nuclear@3 398 if(sel_curve && sel_pidx != -1) {
nuclear@3 399 // we have a curve and a point of the curve selected
nuclear@0 400
nuclear@3 401 if(bnstate & BNBIT(0)) {
nuclear@3 402 // dragging point with left button: move it
nuclear@3 403 sel_curve->move_point(sel_pidx, snap(uv));
nuclear@3 404 post_redisplay();
nuclear@0 405 }
nuclear@3 406
nuclear@3 407 if(bnstate & BNBIT(2)) {
nuclear@3 408 // dragging point with right button: change weight
nuclear@3 409 float w = sel_curve->get_weight(sel_pidx);
nuclear@3 410 w -= dy * 0.01;
nuclear@3 411 if(w < FLT_MIN) w = FLT_MIN;
nuclear@3 412 sel_curve->set_weight(sel_pidx, w);
nuclear@3 413
nuclear@3 414 // popup floating weight label if not already there
nuclear@3 415 if(!weight_label) {
nuclear@3 416 weight_label = new Label;
nuclear@3 417 }
nuclear@3 418 weight_label->set_position(uv);
nuclear@3 419 weight_label->set_textf("w=%g", w);
nuclear@3 420 post_redisplay();
nuclear@3 421 }
nuclear@3 422 } else {
nuclear@3 423 // no selection, we're dragging in empty space: manipulate viewport
nuclear@3 424 Vector2 dir = uv - prev_uv;
nuclear@3 425
nuclear@3 426 if(bnstate & (BNBIT(0) | BNBIT(1))) {
nuclear@3 427 // panning
nuclear@3 428 view_pan += dir;
nuclear@3 429 calc_view_matrix();
nuclear@3 430 post_redisplay();
nuclear@3 431 }
nuclear@3 432 if(bnstate & BNBIT(2)) {
nuclear@3 433 // zooming
nuclear@3 434 view_scale -= ((float)dy / (float)win_height) * view_scale * 5.0;
nuclear@3 435 if(view_scale < 1e-4) view_scale = 1e-4;
nuclear@3 436 calc_view_matrix();
nuclear@3 437 post_redisplay();
nuclear@3 438 }
nuclear@0 439 }
nuclear@0 440 }
nuclear@0 441 }
nuclear@0 442
nuclear@0 443 static void on_click(int bn, float u, float v)
nuclear@0 444 {
nuclear@2 445 Vector2 uv = Vector2(u, v);
nuclear@2 446
nuclear@0 447 switch(bn) {
nuclear@2 448 case 0: // ------- LEFT CLICK ------
nuclear@2 449 if(hover_curve) {
nuclear@2 450 // if we're hovering: click selects
nuclear@2 451 sel_curve = hover_curve;
nuclear@2 452 hover_curve = 0;
nuclear@2 453 } else if(sel_curve) {
nuclear@2 454 // if we have a selected curve: click adds point (enter new_curve mode)
nuclear@2 455 std::vector<Curve*>::iterator it = std::find(curves.begin(), curves.end(), sel_curve);
nuclear@2 456 assert(it != curves.end());
nuclear@2 457 curves.erase(it, it + 1);
nuclear@2 458
nuclear@2 459 new_curve = sel_curve;
nuclear@2 460 sel_curve = 0;
nuclear@2 461 sel_pidx = -1;
nuclear@2 462
nuclear@2 463 new_curve->add_point(uv);
nuclear@2 464 } else {
nuclear@2 465 // otherwise, click starts a new curve
nuclear@2 466 if(!new_curve) {
nuclear@2 467 new_curve = new Curve;
nuclear@2 468 new_curve->add_point(uv);
nuclear@2 469 }
nuclear@2 470 new_curve->add_point(uv);
nuclear@0 471 }
nuclear@0 472 post_redisplay();
nuclear@0 473 break;
nuclear@0 474
nuclear@2 475 case 2: // ------- RIGHT CLICK ------
nuclear@2 476 if(new_curve) {
nuclear@2 477 // in new-curve mode: finish curve (cancels last floating segment)
nuclear@2 478 new_curve->remove_point(new_curve->size() - 1);
nuclear@2 479 if(new_curve->empty()) {
nuclear@2 480 delete new_curve;
nuclear@2 481 } else {
nuclear@2 482 curves.push_back(new_curve);
nuclear@2 483 }
nuclear@2 484 new_curve = 0;
nuclear@2 485
nuclear@2 486 } else if(sel_curve) {
nuclear@2 487 // in selected curve mode: delete control point or unselect
nuclear@2 488 Curve *hit_curve;
nuclear@2 489 int hit_pidx;
nuclear@2 490 if(point_hit_test(uv, &hit_curve, &hit_pidx) && hit_curve == sel_curve) {
nuclear@2 491 hit_curve->remove_point(hit_pidx);
nuclear@2 492 sel_pidx = -1;
nuclear@2 493 } else {
nuclear@2 494 sel_curve = 0;
nuclear@2 495 sel_pidx = -1;
nuclear@2 496 }
nuclear@2 497 }
nuclear@0 498 post_redisplay();
nuclear@0 499 break;
nuclear@0 500
nuclear@0 501 default:
nuclear@0 502 break;
nuclear@0 503 }
nuclear@0 504 }