GlOrtho not working properly - c++

Question

I am using GLUT and for some reason my glOrtho isn't working properly.
This is my code:
#include"Dependencies\glew\glew.h"
#include"Dependencies\freeglut\freeglut.h"
#include<iostream>
void render(void)
{
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glClearColor(1, 1, 1, 1.0);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, 1280, 720, 0, 0, 1);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
float x = 0.0;
float y = 0;
glBegin(GL_QUADS);
glColor3f(1, 0, 0);
glVertex2f(x, y);
glVertex2f(x + .1, y);
glVertex2f(x + .1, y + .1);
glVertex2f(x, y + .1);
glEnd();
glutSwapBuffers();
}
void closeCallback()
{
std::cout << "GLUT:\t Finished" << std::endl;
glutLeaveMainLoop();
}
int main(int argc, char **argv)
{
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
glutInitWindowPosition(32, 32);
glutInitWindowSize(1280, 720);
glutCreateWindow("MahGame");
glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_GLUTMAINLOOP_RETURNS);
glewInit();
glutDisplayFunc(render);
glutCloseFunc(closeCallback);
glutMainLoop();
return 0;
}
Even though I set my x and y floats to 0 I renders it in the middle, and when I try something like x + 50, it is SUPER huge, I have to make it x + 0.5f so that my triangle is small.

Answer 1

You are not setting your projection matrix correctly:
glLoadIdentity();
glOrtho(0, 1280, 720, 0, 0, 1);
glLoadIdentity();
The second glLoadIdentity() completely overwrites whatever matrix was set before, so that your glOrtho() does not have any effect at all (besides consuming some CPU cycles).