本文整理汇总了C++中GLFrustum::setFromGL方法的典型用法代码示例。如果您正苦于以下问题：C++ GLFrustum::setFromGL方法的具体用法？C++ GLFrustum::setFromGL怎么用？C++ GLFrustum::setFromGL使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GLFrustum的用法示例。
在下文中一共展示了GLFrustum::setFromGL方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: render
void ParticleSprayerTool::render(DTS::DataItem* dataItem) const
{
// draw all emitter objects
drawEmitters();
// save current attribute state
#ifdef MESA
// GL_POINT_BIT causes GL enum error
glPushAttrib(GL_LIGHTING_BIT | GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
#else
glPushAttrib(GL_LIGHTING_BIT | GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT | GL_POINT_BIT);
#endif
glDisable(GL_LIGHTING);
glDepthMask(GL_FALSE);
glEnable(GL_POINT_SMOOTH);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, dataItem->spriteTextureObjectId);
glTexEnvf(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
glEnable(GL_POINT_SPRITE_ARB);
float particleRadius=data.point_radius;//*1000.0;
// Query the OpenGL viewing frustrum
GLFrustum<float> frustum;
frustum.setFromGL();
#ifdef GHETTO
if (0)
#else
if (dataItem->hasShaders)
#endif
{
/* Calculate the scaled point size for this frustum: */
GLfloat scaledParticleRadius=frustum.getPixelSize() * particleRadius / frustum.getEyeScreenDistance();
/* Enable the vertex/fragment shader: */
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
glUseProgramObjectARB(dataItem->programObject);
glUniform1fARB(dataItem->scaledParticleRadiusLocation, scaledParticleRadius);
glUniform1iARB(dataItem->tex0Location, 0);
}
else
{
glPointSize(particleRadius
* Vrui::getNavigationTransformation().getScaling());
GLfloat linear[3]= { 0.0, 1 / 5.0, 0.0 };
glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, linear);
//
// NOTE::the following scaling calculation does not work properly
// in the CAVE. This is due to changes in the OpenGL library and
// cannot be fixed. On a 2D screen the scaling should look correct.
//
// Calculate the nominal pixel size for particles
float pointSizeCounter=frustum.getPixelSize() * 2.0f * particleRadius;
float pointSizeDenominator=frustum.getEyeScreenDistance();
// Query the maximum point size accepted by glPointSize(...)
GLfloat pointSizeRange[2];
glGetFloatv(GL_SMOOTH_POINT_SIZE_RANGE, pointSizeRange);
// Enable point parameters
glPointSize(pointSizeRange[1]); // select the maximum point size
pointSizeCounter/=pointSizeRange[1]; // adjust the point size numerator
GLfloat attenuation[3]= { 0.0f, 0.0f, 0.0f };
attenuation[2]=Math::sqr(pointSizeDenominator / pointSizeCounter);
glPointParameterfvARB(GL_POINT_DISTANCE_ATTENUATION_ARB, attenuation);
}
glBindBufferARB(GL_ARRAY_BUFFER_ARB, dataItem->vertexBufferId);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
if (dataItem->versionDS != data.currentVersion)
{
dataItem->numParticlesDS = data.particles.size();
glBufferDataARB(GL_ARRAY_BUFFER_ARB, dataItem->numParticlesDS * sizeof(PointParticle), &data.particles[0], GL_DYNAMIC_DRAW_ARB);
dataItem->versionDS = data.currentVersion;
}
glInterleavedArrays(GL_C4UB_V3F, sizeof(PointParticle), 0);
// Care needed if particle number has changed but we haven't updated buffer.
glDrawArrays(GL_POINTS, 0, dataItem->numParticlesDS);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
#ifndef GHETTO
if (dataItem->hasShaders)
//.........这里部分代码省略.........
示例2: render
void DotSpreaderTool::render(DTS::DataItem* dataItem) const
{
// if dragging locator render release sphere
if (active and !data.running)
{
// save current attribute state
#ifdef MESA
// GL_POINT_BIT causes GL enum error
glPushAttrib(GL_LIGHTING_BIT | GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
#else
glPushAttrib(GL_LIGHTING_BIT | GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT | GL_POINT_BIT);
#endif
glDisable(GL_LIGHTING);
// save current location
glPushMatrix();
// move to center of sphere
glTranslatef(org[0], org[1], org[2]);
// compute radius of sphere
float radius=Math::sqrt((pos[0] - org[0]) * (pos[0] - org[0]) + (pos[1]
- org[1]) * (pos[1] - org[1]) + (pos[2] - org[2]) * (pos[2]
- org[2]));
GLUquadricObj *quadric=gluNewQuadric();
// draw transparent sphere
gluQuadricDrawStyle(quadric, GLU_FILL);
glDepthMask(GL_FALSE);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glColor4f(0.0f, 0.6f, 1.0f, 0.2f);
gluSphere(quadric, radius, 10, 15);
glDisable(GL_BLEND);
// draw surrounding wireframe (solid)
gluQuadricDrawStyle(quadric, GLU_LINE);
glDepthMask(GL_TRUE);
glColor4f(0.0f, 0.8f, 1.0f, 1.0f);
gluSphere(quadric, radius, 10, 15);
glDepthMask(GL_FALSE);
gluDeleteQuadric(quadric);
// restore previous position
glPopMatrix();
// restore previous attribute state
glPopAttrib();
}
// if simulation is running draw particles
else if (data.running)
{
// save current attribute state
#ifdef MESA
// GL_POINT_BIT causes GL enum error
glPushAttrib(GL_LIGHTING_BIT | GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
#else
glPushAttrib(GL_LIGHTING_BIT | GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT | GL_POINT_BIT);
#endif
glDisable(GL_LIGHTING);
glDepthMask(GL_FALSE);
glEnable(GL_POINT_SMOOTH);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, dataItem->spriteTextureObjectId);
glTexEnvf(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
glEnable(GL_POINT_SPRITE_ARB);
float particleRadius=data.point_radius;
// Query the OpenGL viewing frustum
GLFrustum<float> frustum;
frustum.setFromGL();
#ifdef GHETTO
if (0)
#else
if (dataItem->hasShaders)
#endif
{
/* Calculate the scaled point size for this frustum: */
GLfloat scaledParticleRadius=frustum.getPixelSize() * particleRadius
/ frustum.getEyeScreenDistance();
/* Enable the vertex/fragment shader: */
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
glUseProgramObjectARB(dataItem->programObject);
glUniform1fARB(dataItem->scaledParticleRadiusLocation, scaledParticleRadius);
glUniform1iARB(dataItem->tex0Location, 0);
}
else
//.........这里部分代码省略.........