diff 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
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line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/34	Mon Jun 12 20:13:04 2023 +0100
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <GL/glut.h>
+
+
+#define HEIGHT 1080
+#define WIDTH 1920
+
+
+void setup() {
+
+	// Set background dark
+	glClearColor(0.0, 0.0, 0.0, 1.0);
+
+	// Set point color and size to 1 pixel
+	glColor3f(0.0, 1.0, 0.0);
+	glPointSize(5.0);
+
+	// Matrix projection
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+
+
+	// Set the coordinates to be used with the viewport
+	gluOrtho2D(0, WIDTH, HEIGHT, 0);
+
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+}
+
+
+void display() {
+	glClear(GL_COLOR_BUFFER_BIT);
+    glBegin(GL_QUADS);
+    glVertex2f(100.0f, 100.0f);  // Bottom-left vertex of first rectangle
+    glVertex2f(200.0f, 100.0f);  // Bottom-right vertex of first rectangle
+    glVertex2f(200.0f, 200.0f);  // Top-right vertex of first rectangle
+    glVertex2f(100.0f, 200.0f);  // Top-left vertex of first rectangle
+	glEnd();
+	glFlush();
+}
+
+
+int main(int argc, char** argv) {
+
+	glutInit(&argc, argv);
+	glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
+	glutInitWindowSize(WIDTH, HEIGHT);
+	glutCreateWindow("OpenGL Window");
+	setup();
+	glutDisplayFunc(display);
+	glutMainLoop();
+
+	return 0;
+}