c – OpenGL Render Sphere Without Glut：这个实现有什么问题？

概述在我的渲染循环中,我有以下逻辑.我还有其他东西渲染到屏幕上,然后渲染,(我删除了那些代码以便直接指向).这段代码不会渲染一个球体,我无法弄清楚为什么不这样做.我在数学中遗漏了什么吗？我已经完成了调试器,值似乎正确.注意mBubbleDiameter在此对象的构造函数中设置为20. static GLfloat staticDegreesToRadians(GLfloat tmpDegrees) { 在我的渲染循环中,我有以下逻辑.我还有其他东西渲染到屏幕上,然后渲染,(我删除了那些代码以便直接指向).这段代码不会渲染一个球体,我无法弄清楚为什么不这样做.我在数学中遗漏了什么吗？我已经完成了调试器,值似乎正确.注意mBubbleDiameter在此对象的构造函数中设置为20.

static GLfloat staticdegreesToradians(GLfloat tmpdegrees) {    return tmpdegrees * ((std::atan(1.0f)*4)/180.0f);}voID LedPannelWidget::updateGL() {    glMatrixMode(GL_PROJECTION);        glLoadIDentity();        glVIEwport(0,mWIDth,mHeight);        glOrtho(0,mHeight,-mBubbleDiameter,mBubbleDiameter);    glMatrixMode(GL_MODELVIEW);        glScissor(0,mHeight);        glClear(GL_color_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);        glClearcolor(0.92f,0.92f,1.0);        glLoadIDentity();    const GLfloat tmpRadius = mDiameter/2.0f;    const GLfloat tmpDelta = 5.00f;    const GLfloat tmpDeltaradians = staticdegreesToradians(tmpDelta);    for (int32_t tmpTheta = 180; tmpTheta > 0; tmpTheta -= tmpDelta) {        for (int32_t tmpPhi = 0; tmpPhi < 360; tmpPhi += tmpDelta) {            GLfloat tmpThetaradians = staticdegreesToradians(tmpTheta);            GLfloat tmpPhiradians = staticdegreesToradians(tmpTheta);            GLfloat tmpX1 = tmpRadius *                std::sin(tmpThetaradians) *                 std::cos(tmpPhiradians);             GLfloat tmpY1 = tmpRadius *                std::sin(tmpThetaradians) *                std::cos(tmpPhiradians);            GLfloat tmpZ1 = tmpRadius *                std::cos(tmpThetaradians);            GLfloat tmpX2 = tmpRadius *                std::sin(tmpThetaradians - tmpDeltaradians) *                 std::cos(tmpPhiradians);            GLfloat tmpY2 = tmpRadius *                std::sin(tmpThetaradians - tmpDeltaradians) *                std::cos(tmpPhiradians);             GLfloat tmpZ2 = tmpRadius *                std::cos(tmpThetaradians - tmpDeltaradians);            GLfloat tmpX3 = tmpRadius *                 std::sin(tmpThetaradians - tmpDeltaradians) *                std::cos(tmpPhiradians + tmpDeltaradians);            GLfloat tmpY3 = tmpRadius *                std::sin(tmpThetaradians - tmpDeltaradians) *                std::cos(tmpPhiradians + tmpDeltaradians);            GLfloat tmpZ3 = tmpRadius *                std::cos(tmpThetaradians - tmpDeltaradians);            GLfloat tmpX4 = tmpRadius *                  std::sin(tmpThetaradians) *                std::cos(tmpPhiradians + tmpDeltaradians);            GLfloat tmpY4 = tmpRadius *                std::sin(tmpThetaradians) *                std::cos(tmpPhiradians + tmpDeltaradians);            GLfloat tmpZ4 = tmpRadius *                std::cos(tmpThetaradians);            glBegin(GL_QUADS);                glVertex3f(tmpX1,tmpY1,tmpZ1);                glVertex3f(tmpX2,tmpY2,tmpZ2);                glVertex3f(tmpX3,tmpY3,tmpZ3);                glVertex3f(tmpX4,tmpY4,tmpZ4);            glEnd();            if (tmpGLError != GL_NO_ERROR) {                QApplication::exit(0);            }        }    }    swapBuffers();}

工作GL算法：

const GLfloat r = mDiameter/2.0f;const GLfloat phID = 20.00f;const GLfloat thetad = 20.00f;const GLfloat x = mCenterXCoord;const GLfloat y = mCenterYCoord;using namespace std;for (int32_t phi = 180; phi > 0; phi -= phID) {    int32_t theta = 0;    GLfloat rphi = staticdegreesToradians(phi);    GLfloat rtheta = staticdegreesToradians(theta);    glBegin(GL_QUAD_STRIP);    glcolor3f(mCurrentcolor.red()/255.0,mCurrentcolor.green()/255.0,mCurrentcolor.blue()/255.0);    glVertex3f(        (x + (r * sin(rphi) * cos(rtheta))),(y + (r * cos(rphi))),(0 + (r * sin(rphi) * cos(rtheta))));    glVertex3f(        (x + (r * sin(rphi + phID) * cos(rtheta))),(y + (r * cos(rphi + phID))),(0 + (r * sin(rphi + phID) * cos(rtheta))));    for (; theta < 360; theta += thetad) {        rtheta = staticdegreesToradians(theta);        glVertex3f(            (x + (r * sin(rphi + phID) * cos(rtheta + thetad))),(0 + (r * sin(rphi + phID) * cos(rtheta + thetad))));        glVertex3f(            (x + (r * sin(rphi) * cos(rtheta + thetad))),(0 + (r * sin(rphi) * cos(rtheta + thetad))));    }    glEnd();}

解决方法 在这些行中检查您的代码

GLfloat tmpThetaradians = staticdegreesToradians(tmpTheta);        GLfloat tmpPhiradians = staticdegreesToradians(tmpTheta);        GLfloat tmpX1 = tmpRadius *            std::sin(tmpThetaradians) *             std::cos(tmpPhiradians);         GLfloat tmpY1 = tmpRadius *            std::sin(tmpThetaradians) *            std::cos(tmpPhiradians);        GLfloat tmpZ1 = tmpRadius *            std::cos(tmpThetaradians);

您需要更改,请参阅下文

GLfloat tmpThetaradians = staticdegreesToradians(tmpTheta);       GLfloat tmpPhiradians = staticdegreesToradians(tmpPhi);       GLfloat tmpX1 = tmpRadius *            std::sin(tmpThetaradians) *             std::sin(tmpPhiradians);         GLfloat tmpY1 = tmpRadius *            std::sin(tmpThetaradians) *            std::cos(tmpPhiradians);        GLfloat tmpZ1 = tmpRadius *            std::cos(tmpThetaradians);

总结

以上是内存溢出为你收集整理的c – OpenGL Render Sphere Without Glut：这个实现有什么问题？全部内容，希望文章能够帮你解决c – OpenGL Render Sphere Without Glut：这个实现有什么问题？所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。