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comparison main.c @ 2:ea3c427d922d

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draw a weird filled rectangle
author Dennis C. M. <dennis@denniscm.com>
date Mon, 12 Jun 2023 18:45:30 +0100
parents 6882194679b5
children e4003f606e07
comparison
equal deleted inserted replaced
1:d445f99d9b13 2:ea3c427d922d
5 #define HEIGHT 1080 5 #define HEIGHT 1080
6 #define WIDTH 1920 6 #define WIDTH 1920
7 7
8 8
9 void setup() { 9 void setup() {
10 10
11 // Set background dark 11 // Set background dark
12 glClearColor(0.0, 0.0, 0.0, 1.0); 12 glClearColor(0.0, 0.0, 0.0, 1.0);
13 13
14 // Set point color and size to 1 pixel 14 // Set point color and size to 1 pixel
15 glColor3f(0.0, 1.0, 0.0); 15 glColor3f(0.0, 1.0, 0.0);
16 glPointSize(5.0); 16 glPointSize(5.0);
17 17
18 // Matrix projection and reset with identity 18 // Matrix projection and reset with identity
19 glMatrixMode(GL_PROJECTION); 19 glMatrixMode(GL_PROJECTION);
20 glLoadIdentity(); 20 glLoadIdentity();
21 21
22 // Set the coordinates to be used with the viewport 22 // Set the coordinates to be used with the viewport
23 gluOrtho2D(0, WIDTH, HEIGHT, 0); 23 gluOrtho2D(-300, 300, 300, -300);
24
25 glMatrixMode(GL_MODELVIEW);
26 glLoadIdentity();
27
24 } 28 }
25 29
26 30
27 void display() { 31 void display() {
28 glClear(GL_COLOR_BUFFER_BIT); 32 glClear(GL_COLOR_BUFFER_BIT);
29 glBegin(GL_POINTS); 33 glRectf(100.0f, 100.0f, 200.0f, 200.0f);
30 glVertex2i(1920/2, 1080/2); 34 // glVertex2i(1920/2, 1080/2);
31 glEnd();
32 glFlush(); 35 glFlush();
33 } 36 }
34 37
35 38
36 int main(int argc, char** argv) { 39 int main(int argc, char** argv) {