Mercurial > public > algo-animator
annotate 34 @ 3:e4003f606e07
draw multiple rectangles with loop
| author | Dennis C. M. <dennis@denniscm.com> |
|---|---|
| date | Mon, 12 Jun 2023 20:13:04 +0100 |
| parents | main.c@ea3c427d922d |
| children |
| rev | line source |
|---|---|
| 0 | 1 #include <stdio.h> |
| 2 #include <GL/glut.h> | |
| 3 | |
| 4 | |
| 5 #define HEIGHT 1080 | |
| 6 #define WIDTH 1920 | |
| 7 | |
| 8 | |
| 9 void setup() { | |
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ea3c427d922d
draw a weird filled rectangle
Dennis C. M. <dennis@denniscm.com>
parents:
0
diff
changeset
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10 |
| 0 | 11 // Set background dark |
| 12 glClearColor(0.0, 0.0, 0.0, 1.0); | |
| 13 | |
| 14 // Set point color and size to 1 pixel | |
| 15 glColor3f(0.0, 1.0, 0.0); | |
| 16 glPointSize(5.0); | |
| 17 | |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
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18 // Matrix projection |
| 0 | 19 glMatrixMode(GL_PROJECTION); |
| 20 glLoadIdentity(); | |
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ea3c427d922d
draw a weird filled rectangle
Dennis C. M. <dennis@denniscm.com>
parents:
0
diff
changeset
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21 |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
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22 |
| 0 | 23 // Set the coordinates to be used with the viewport |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
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24 gluOrtho2D(0, WIDTH, HEIGHT, 0); |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
25 |
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2
ea3c427d922d
draw a weird filled rectangle
Dennis C. M. <dennis@denniscm.com>
parents:
0
diff
changeset
|
26 |
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ea3c427d922d
draw a weird filled rectangle
Dennis C. M. <dennis@denniscm.com>
parents:
0
diff
changeset
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27 glMatrixMode(GL_MODELVIEW); |
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ea3c427d922d
draw a weird filled rectangle
Dennis C. M. <dennis@denniscm.com>
parents:
0
diff
changeset
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28 glLoadIdentity(); |
| 0 | 29 } |
| 30 | |
| 31 | |
| 32 void display() { | |
| 33 glClear(GL_COLOR_BUFFER_BIT); | |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
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34 glBegin(GL_QUADS); |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
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35 glVertex2f(100.0f, 100.0f); // Bottom-left vertex of first rectangle |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
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36 glVertex2f(200.0f, 100.0f); // Bottom-right vertex of first rectangle |
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e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
37 glVertex2f(200.0f, 200.0f); // Top-right vertex of first rectangle |
|
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
38 glVertex2f(100.0f, 200.0f); // Top-left vertex of first rectangle |
|
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
39 glEnd(); |
| 0 | 40 glFlush(); |
| 41 } | |
| 42 | |
| 43 | |
| 44 int main(int argc, char** argv) { | |
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3
e4003f606e07
draw multiple rectangles with loop
Dennis C. M. <dennis@denniscm.com>
parents:
2
diff
changeset
|
45 |
| 0 | 46 glutInit(&argc, argv); |
| 47 glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB); | |
| 48 glutInitWindowSize(WIDTH, HEIGHT); | |
| 49 glutCreateWindow("OpenGL Window"); | |
| 50 setup(); | |
| 51 glutDisplayFunc(display); | |
| 52 glutMainLoop(); | |
| 53 | |
| 54 return 0; | |
| 55 } |