Mercurial > public > algo-animator
annotate main.c @ 7:f159eec07daf
refactor
| author | Dennis C. M. <dennis@denniscm.com> |
|---|---|
| date | Fri, 23 Jun 2023 10:01:37 +0100 |
| parents | 40a8bdbe2005 |
| children | f7af7255705e |
| rev | line source |
|---|---|
|
4
035d3880da04
render text with number of elements on screen
Dennis C. M. <dennis@denniscm.com>
parents:
3
diff
changeset
|
1 #include "utils.h" |
| 7 | 2 #include <GL/glut.h> |
|
5
6be2faa7ed6e
rectangles with variable height
Dennis C. M. <dennis@denniscm.com>
parents:
4
diff
changeset
|
3 #include <stdio.h> |
|
6be2faa7ed6e
rectangles with variable height
Dennis C. M. <dennis@denniscm.com>
parents:
4
diff
changeset
|
4 #include <stdlib.h> |
| 0 | 5 |
| 6 | |
|
6
40a8bdbe2005
Refactor to array of structures
Dennis C. M. <dennis@denniscm.com>
parents:
5
diff
changeset
|
7 #define WINDOW_HEIGHT 1080 |
|
40a8bdbe2005
Refactor to array of structures
Dennis C. M. <dennis@denniscm.com>
parents:
5
diff
changeset
|
8 #define WINDOW_WIDTH 1920 |
| 7 | 9 #define RECT_WIDTH 5 |
| 10 #define SPACE 5 | |
| 11 | |
| 12 | |
| 13 struct Rectangle { | |
| 14 int width; | |
| 15 int height; | |
| 16 int x; | |
| 17 }; | |
| 18 | |
| 19 // Globals | |
| 20 struct Rectangle* rectangles; | |
| 21 int n_rectangles; | |
| 0 | 22 |
| 23 | |
| 24 void setup() { | |
|
2
ea3c427d922d
draw a weird filled rectangle
Dennis C. M. <dennis@denniscm.com>
parents:
0
diff
changeset
|
25 |
| 0 | 26 // Set background dark |
| 27 glClearColor(0.0, 0.0, 0.0, 1.0); | |
| 28 | |
| 29 // Set point color and size to 1 pixel | |
| 30 glColor3f(0.0, 1.0, 0.0); | |
| 31 glPointSize(5.0); | |
| 32 | |
| 33 // Matrix projection and reset with identity | |
| 34 glMatrixMode(GL_PROJECTION); | |
| 35 glLoadIdentity(); | |
|
2
ea3c427d922d
draw a weird filled rectangle
Dennis C. M. <dennis@denniscm.com>
parents:
0
diff
changeset
|
36 |
| 0 | 37 // Set the coordinates to be used with the viewport |
|
6
40a8bdbe2005
Refactor to array of structures
Dennis C. M. <dennis@denniscm.com>
parents:
5
diff
changeset
|
38 gluOrtho2D(0, WINDOW_WIDTH, WINDOW_HEIGHT, 0); |
| 0 | 39 } |
| 40 | |
| 41 | |
| 42 void display() { | |
| 43 glClear(GL_COLOR_BUFFER_BIT); | |
|
3
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
44 glBegin(GL_QUADS); |
|
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
45 |
| 7 | 46 for (int i = 0; i < n_rectangles; i++) { |
| 47 glVertex2f(rectangles[i].x, WINDOW_HEIGHT - 100); | |
| 48 glVertex2f(rectangles[i].x + rectangles[i].width, WINDOW_HEIGHT - 100); | |
| 49 glVertex2f(rectangles[i].x + rectangles[i].width, rectangles[i].height); | |
| 50 glVertex2d(rectangles[i].x, rectangles[i].height); | |
|
3
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
51 } |
|
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
52 |
|
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
53 glEnd(); |
|
6
40a8bdbe2005
Refactor to array of structures
Dennis C. M. <dennis@denniscm.com>
parents:
5
diff
changeset
|
54 |
| 7 | 55 // Render text |
|
4
035d3880da04
render text with number of elements on screen
Dennis C. M. <dennis@denniscm.com>
parents:
3
diff
changeset
|
56 char text[256]; |
| 7 | 57 sprintf(text, "Number of elements: %i", n_rectangles); |
| 58 glRasterPos2f(20.0, WINDOW_HEIGHT - 50); | |
|
6
40a8bdbe2005
Refactor to array of structures
Dennis C. M. <dennis@denniscm.com>
parents:
5
diff
changeset
|
59 |
| 7 | 60 for (const char *c = text; *c; ++c) { |
| 61 glutBitmapCharacter(GLUT_BITMAP_TIMES_ROMAN_24, *c); | |
| 62 } | |
| 63 | |
| 0 | 64 glFlush(); |
| 65 } | |
| 66 | |
| 67 | |
| 68 int main(int argc, char** argv) { | |
| 7 | 69 n_rectangles = floor((WINDOW_WIDTH - RECT_WIDTH) / (RECT_WIDTH + SPACE)) + 1; |
| 70 rectangles = malloc(n_rectangles * sizeof(struct Rectangle)); | |
| 71 | |
| 72 int x_pos = 1; | |
| 73 | |
| 74 int i = 0; | |
| 75 while (i < n_rectangles) { | |
| 76 rectangles[i].width = RECT_WIDTH; | |
| 77 rectangles[i].height = random_int(100, WINDOW_HEIGHT - 100); | |
| 78 rectangles[i].x = x_pos; | |
| 79 | |
| 80 x_pos += RECT_WIDTH + SPACE; | |
| 81 i++; | |
| 82 } | |
| 83 | |
| 0 | 84 glutInit(&argc, argv); |
| 85 glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); | |
|
6
40a8bdbe2005
Refactor to array of structures
Dennis C. M. <dennis@denniscm.com>
parents:
5
diff
changeset
|
86 glutInitWindowSize(WINDOW_WIDTH, WINDOW_HEIGHT); |
| 0 | 87 glutCreateWindow("OpenGL Window"); |
| 88 setup(); | |
| 89 glutDisplayFunc(display); | |
| 90 glutMainLoop(); | |
| 91 | |
| 7 | 92 free(rectangles); |
| 93 | |
| 0 | 94 return 0; |
| 95 } | |
| 7 | 96 |
| 97 |