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openglwidget.cpp
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openglwidget.cpp
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#include "openglwidget.h"
void OpenGLWidget::initializeGL()
{
//调用内容初始化函数
initializeOpenGLFunctions();
}
void OpenGLWidget::resizeGL(int w, int h)
{
//当窗口大小改变时,调整界面坐标显示高度和宽度
glViewport(0, 0, w, h);
}
void OpenGLWidget::paintGL()
{
//清除之前图形并将背景设置为黑色(设置为黑色纯粹个人爱好!)
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glEnable(GL_DEPTH_TEST);
//glEnable(GL_TEXTURE_2D);
//glEnable(GL_LIGHTING);
//glEnable(GL_LIGHT0)
glDisable(GL_CULL_FACE);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glShadeModel(GL_SMOOTH);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, screenW, screenH, 0, -1, 1);
//gluPerspective(30, (double)m_Width/m_Height, -1, 1);
//gluLookAt(m_Width/2,200,m_Height/2, -m_Width/4,0,-m_Height/4, 0,-1,1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glColor4ub(255, 255, 255, 255);
qint32 x = 60, y = 60, w = 200, h = 100;
glBegin(GL_QUADS);
//glTexCoord2f(0.0f, 0.0f);
glVertex2i(x, y);
//glTexCoord2f(1.0f, 0.0f);
glVertex2i(x + w, y);
//glTexCoord2f(1.0f, 1.0f);
glVertex2i(x + w, y + h);
//glTexCoord2f(0.0f, 1.0f);
glVertex2i(x, y + h);
glEnd();
qint32 x2 = 160, y2 = 360, w2 = 200, h2 = 100;
glBegin(GL_TRIANGLES);
//glTexCoord2f(0.0f, 0.0f);
glVertex2i(x2 + (0.5 * w2), y2 + h2);
//glTexCoord2f(1.0f, 1.0f);
glVertex2i(x2, y2);
//glTexCoord2f(0.0f, 1.0f);
glVertex2i(x2 + w2, y2);
glEnd();
}