# HG changeset patch
# User Dennis C. M. <dennis@denniscm.com>
# Date 1686597184 -3600
# Node ID e4003f606e078571eefcbfdb571006b0b87aca16
# Parent  ea3c427d922dd92cf4f32b1091c8e24b892a95c7
draw multiple rectangles with loop

diff -r ea3c427d922d -r e4003f606e07 34
--- /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;
+}
diff -r ea3c427d922d -r e4003f606e07 main.c
--- a/main.c	Mon Jun 12 18:45:30 2023 +0100
+++ b/main.c	Mon Jun 12 20:13:04 2023 +0100
@@ -20,18 +20,36 @@
 	glLoadIdentity();
 
 	// Set the coordinates to be used with the viewport
-	gluOrtho2D(-300, 300, 300, -300);
-
-	glMatrixMode(GL_MODELVIEW);
-	glLoadIdentity();
-
+	gluOrtho2D(0, WIDTH, HEIGHT, 0);
 }
 
 
 void display() {
 	glClear(GL_COLOR_BUFFER_BIT);
-	glRectf(100.0f, 100.0f, 200.0f, 200.0f);
-	//	glVertex2i(1920/2, 1080/2);
+	glBegin(GL_QUADS);
+	/*
+	glVertex2f(100.0, 100.0);      // Top left
+	glVertex2f(150.0, 100.0);     // Top right
+	glVertex2f(150.0, 300.0);	   // Bottom right 
+	glVertex2f(100.0, 300.0);    // Bottom left
+
+	glVertex2f(160.0, 100.0);
+	glVertex2f(210.0, 100.0);
+	glVertex2f(210.0, 300.0);
+	glVertex2d(160.0, 300.0);
+	*/
+	
+	float rect_width = 5.0;
+	float space = 10.0;
+
+	for (float pos_x = 100.0; pos_x < 500.0; pos_x += 10.0) {
+		glVertex2f(pos_x, 100.0);
+		glVertex2f(pos_x + rect_width, 100.0);
+		glVertex2f(pos_x + rect_width, 300.0);
+		glVertex2d(pos_x, 300.0);
+	}
+
+	glEnd();
 	glFlush();
 }