algo-animator: main.c annotate

annotate main.c @ 4:035d3880da04

render text with number of elements on screen

author	Dennis C. M. <dennis@denniscm.com>
date	Mon, 12 Jun 2023 23:10:08 +0100
parents	e4003f606e07
children	6be2faa7ed6e

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"
0 6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	2
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	3
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	4 #define HEIGHT 1080
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	5 #define WIDTH 1920
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	6
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	7
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	8 void setup() {
2 ea3c427d922d draw a weird filled rectangle Dennis C. M. <dennis@denniscm.com> parents: 0 diff changeset	9
0 6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	10 // Set background dark
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	11 glClearColor(0.0, 0.0, 0.0, 1.0);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	12
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	13 // Set point color and size to 1 pixel
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	14 glColor3f(0.0, 1.0, 0.0);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	15 glPointSize(5.0);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	16
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	17 // Matrix projection and reset with identity
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	18 glMatrixMode(GL_PROJECTION);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	19 glLoadIdentity();
2 ea3c427d922d draw a weird filled rectangle Dennis C. M. <dennis@denniscm.com> parents: 0 diff changeset	20
0 6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	21 // Set the coordinates to be used with the viewport
3 e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	22 gluOrtho2D(0, WIDTH, HEIGHT, 0);
0 6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	23 }
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	24
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	25
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	26 void display() {
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	27 glClear(GL_COLOR_BUFFER_BIT);
3 e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	28 glBegin(GL_QUADS);
e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	29
4 035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	30 float x = 1;
3 e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	31 float rect_width = 5.0;
4 035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	32 float space = 5.0;
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	33 int max_rects = floor((WIDTH - rect_width) / (rect_width + space)) + x;
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	34
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	35 int rect_counter = 0;
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	36 while (rect_counter < max_rects) {
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	37 glVertex2f(x, 100.0);
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	38 glVertex2f(x + rect_width, 100.0);
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	39 glVertex2f(x + rect_width, HEIGHT - 300);
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	40 glVertex2d(x, HEIGHT - 300);
3 e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	41
4 035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	42 x += rect_width + space;
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	43 rect_counter++;
3 e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	44 }
e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	45
e4003f606e07 draw multiple rectangles with loop Dennis C. M. <dennis@denniscm.com> parents: 2 diff changeset	46 glEnd();
4 035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	47
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	48 char text[256];
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	49 sprintf(text, "Number of elements: %i", rect_counter);
035d3880da04 render text with number of elements on screen Dennis C. M. <dennis@denniscm.com> parents: 3 diff changeset	50 render_text(text, 20.0, HEIGHT - 200);
0 6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	51 glFlush();
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	52 }
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	53
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	54
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	55 int main(int argc, char** argv) {
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	56 glutInit(&argc, argv);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	57 glutInitDisplayMode(GLUT_SINGLE \| GLUT_RGB);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	58 glutInitWindowSize(WIDTH, HEIGHT);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	59 glutCreateWindow("OpenGL Window");
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	60 setup();
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	61 glutDisplayFunc(display);
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	62 glutMainLoop();
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	63
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	64 return 0;
6882194679b5 draw a point Dennis C. M. <dennis@denniscm.com> parents: diff changeset	65 }

Mercurial > public > algo-animator

annotate main.c @ 4:035d3880da04