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glwidget.cpp
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glwidget.cpp
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#include "glwidget.h"
#include <QDebug>
GLWidget::GLWidget(QWidget *parent) :
QGLWidget(parent)
{
}
void GLWidget::initializeGL()
{
glClearColor(0,0,0,1.0);
EnableDepthOverlay();
angleX = 0;
angleY = 0;
angleZ = 0;
oldX = 0;
oldY = 0;
oldZ = 0;
oldScale = 1; newScale = 1;
}
void GLWidget::paintGL()
{
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClearDepth(1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glViewport(0,0,this->width(), this->height());
//DrawAxes();
//glPushMatrix();
DrawTower();
//glPopMatrix();
}
void GLWidget::resizeGL(int w, int h)
{
}
void GLWidget::DrawTower()
{
glBegin(GL_QUADS);
glColor3f(0,0,1);
glVertex3f(PT_A);
glVertex3f(PT_B);
glVertex3f(PT_C);
glVertex3f(PT_D);
glColor3f(0,1,0);
glVertex3f(PT_A);
glVertex3f(PT_F);
glVertex3f(PT_G);
glVertex3f(PT_B);
glColor3f(0,1,1);
glVertex3f(PT_A);
glVertex3f(PT_D);
glVertex3f(PT_E);
glVertex3f(PT_F);
glColor3f(1,0,0);
glVertex3f(PT_C);
glVertex3f(PT_D);
glVertex3f(PT_E);
glVertex3f(PT_H);
glColor3f(1,0,1);
glVertex3f(PT_E);
glVertex3f(PT_F);
glVertex3f(PT_G);
glVertex3f(PT_H);
glColor3f(1,1,0);
glVertex3f(PT_B);
glVertex3f(PT_C);
glVertex3f(PT_H);
glVertex3f(PT_G);
glEnd();
}
void GLWidget::ChangeScale(double scale)
{
newScale = 1/scale;
updateGL();
}
void GLWidget::DrawAxes()
{
//Draw the coordinate axes
glBegin(GL_LINES);
glColor3f(1,1,1);
glVertex3f(0,0,0);
glVertex3f(1,0,0);
glVertex3f(0,0,0);
glVertex3f(0,1,0);
glVertex3f(0,0,0);
glVertex3f(0,0,1);
glEnd();
}
void GLWidget::EnableDepthOverlay()
{
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glDepthFunc(GL_LEQUAL);
glDepthRange(0.0f, 1.0f);
}
void GLWidget::PerformAllTranslations(double x, double y, double z)
{
glTranslated(x, y, z);
updateGL();
}
void GLWidget::PerformAllRotations(double y, double z, double x)
{
angleX = x - oldX;
glRotated(angleX, 1, 0, 0);
oldX = x;
//qDebug() <<"oldX:" << oldX <<", Incoming x:" << x << ",rotating by:" << angleX;
angleY = y - oldY;
glRotated(angleY, 0, 1, 0);
oldY = y;
angleZ = z - oldZ;
glRotated(angleZ, 0, 0, 1);
oldZ = z;
updateGL();
}