void SceneRenderer::render(
bool _lastFrame,
bool _sameFrame,
bool fullWindow)
{
static const GLfloat blindnessColor[4] = { 1.0f, 1.0f, 0.0f, 1.0f };
static const GLfloat dimnessColor[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
static const float dimDensity = 0.75f;
bool lighting = BZDB.isTrue("lighting");
lastFrame = _lastFrame;
sameFrame = _sameFrame;
// avoid OpenGL calls as long as possible -- there's a good
// chance we're waiting on the vertical retrace.
// set the view frustum
if (sceneIterator) sceneIterator->resetFrustum(&frustum);
// get the important lights in the scene
int i;
int numLights = 0;
if (!sameFrame) {
clearLights();
if (sceneIterator && !blank && lighting) {
// add lights
sceneIterator->reset();
SceneNode* node;
while ((node = sceneIterator->getNext()) != NULL)
node->addLight(*this);
numLights = lights.size();
// pick maxLights most important light sources
// should go by full lighting function but we'll just go by distance
if (numLights > maxLights) {
const GLfloat* eye = frustum.getEye();
for (i = 0; i < maxLights; i++) {
GLfloat maxImportance = lights[i]->getImportance(eye);
for (int j = i + 1; j < numLights; j++) {
GLfloat importance = lights[j]->getImportance(eye);
if (importance > maxImportance) {
OpenGLLight* temp = lights[i];
lights[j] = lights[i];
lights[i] = temp;
maxImportance = importance;
}
}
}
numLights = maxLights;
}
}
}
// get the nodes to draw
if (!blank) {
// empty the render node lists in preparation for the next frame
OpenGLGState::clearLists();
orderedList.clear();
shadowList.clear();
flareLightList.clear();
// make the lists of render nodes sorted in optimal rendering order
if (sceneIterator) {
sceneIterator->reset();
SceneNode* node;
while ((node = sceneIterator->getNext()) != NULL)
node->getRenderNodes(*this);
}
// sort ordered list in reverse depth order
if (!inOrder)
orderedList.sort(frustum.getEye());
}
// prepare transforms
// note -- lights should not be positioned before view is set
frustum.executeDeepProjection();
glPushMatrix();
frustum.executeView();
// turn sunlight on -- the ground needs it
if (lighting && sunOrMoonUp) {
theSun.execute(SunLight);
theSun.enableLight(SunLight);
}
// turn on fog for teleporter blindness if close to a teleporter
float teleporterProximity = 0.0f;
if (!blank && LocalPlayer::getMyTank() && (LocalPlayer::getMyTank()->getTeam() != ObserverTeam))
teleporterProximity = LocalPlayer::getMyTank()->getTeleporterProximity();
float worldSize = BZDB.eval(StateDatabase::BZDB_WORLDSIZE);
bool reallyUseFogHack = useFogHack && (useQualityValue >= 2);
if (reallyUseFogHack) {
if (useDimming) {
const float density = dimDensity;
glFogi(GL_FOG_MODE, GL_LINEAR);
glFogf(GL_FOG_START, -density * 1000.0f * worldSize);
glFogf(GL_FOG_END, (1.0f - density) * 1000.0f * worldSize);
glFogfv(GL_FOG_COLOR, dimnessColor);
glEnable(GL_FOG);
}
else if (teleporterProximity > 0.0f && useFogHack) {
const float density = (teleporterProximity > 0.75f) ?
1.0f : teleporterProximity / 0.75f;
glFogi(GL_FOG_MODE, GL_LINEAR);
glFogf(GL_FOG_START, -density * 1000.0f * worldSize);
glFogf(GL_FOG_END, (1.0f - density) * 1000.0f * worldSize);
glFogfv(GL_FOG_COLOR, blindnessColor);
glEnable(GL_FOG);
}
}
// set scissor
glScissor(window.getOriginX(), window.getOriginY() + window.getHeight() - window.getViewHeight(),
window.getWidth(), window.getViewHeight());
if (useDepthComplexityOn) {
// glEnable(GL_STENCIL_TEST);
// glClear(GL_STENCIL_BUFFER_BIT);
// glStencilFunc(GL_ALWAYS, 0, 0xf);
// glStencilOp(GL_KEEP, GL_INCR, GL_INCR);
}
if (useHiddenLineOn) {
//glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// glClear(GL_COLOR_BUFFER_BIT);
glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
}
else if (useWireframeOn) {
//glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
// glClear(GL_COLOR_BUFFER_BIT);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
}
// prepare z buffer
/*
if (BZDB.isTrue("zbuffer"))
{
if (sameFrame && ++depthRange == numDepthRanges)
depthRange = 0;
if (exposed || useHiddenLineOn || --depthRange < 0)
{
depthRange = numDepthRanges - 1;
glClear(GL_DEPTH_BUFFER_BIT);
exposed = false;
}
if (!sameFrame && numDepthRanges != 1)
{
if (useHiddenLineOn) {
glDepthRange(0.0, 1.0);
}
else {
GLclampd x_near = (GLclampd)depthRange * depthRangeSize;
glDepthRange(x_near, x_near + depthRangeSize);
}
}
}
*/
// draw start of background (no depth testing)
OpenGLGState::resetState();
if (background)
{
background->setBlank(blank);
background->setInvert(invert);
background->renderSkyAndGround(*this, fullWindow);
}
// prepare the other lights but don't turn them on yet --
// we may need to turn them on when drawing the background.
if (lighting) {
for (i = 0; i < numLights; i++)
lights[i]->execute(i + reservedLights);
}
// draw rest of background
if (background)
background->render(*this);
if (!blank) {
if (lighting) {
// now turn on the remaining lights
for (i = 0; i < numLights; i++)
OpenGLLight::enableLight(i + reservedLights);
}
frustum.executeProjection();
if (BZDB.isTrue("zbuffer")) glEnable(GL_DEPTH_TEST);
if (useHiddenLineOn) {
#if defined(GL_VERSION_1_1)
glEnable(GL_POLYGON_OFFSET_FILL);
#elif defined(GL_EXT_polygon_offset)
glEnable(GL_POLYGON_OFFSET_EXT);
#endif
}
// render the normal stuff
doRender();
if (useHiddenLineOn) {
#if defined(GL_VERSION_1_1)
glDisable(GL_POLYGON_OFFSET_FILL);
#elif defined(GL_EXT_polygon_offset)
glDisable(GL_POLYGON_OFFSET_EXT);
#endif
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
doRender();
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
}
OpenGLGState::resetState();
// shut off lights
if (lighting) {
theSun.enableLight(SunLight, false);
for (i = 0; i < numLights; i++)
OpenGLLight::enableLight(i + reservedLights, false);
}
if (BZDB.isTrue("zbuffer")) glDisable(GL_DEPTH_TEST);
// FIXME -- must do post-rendering: flare lights, etc.
// flare lights are in world coordinates. trace ray to that world
// position and calculate opacity. if opaque then don't render
// flare, otherwise modulate input color by opacity and draw a
// billboard texture (constant size in screen space).
}
// back to original state
if (!useHiddenLineOn && useWireframeOn)
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glPopMatrix();
if ((reallyUseFogHack && (teleporterProximity > 0.0f || useDimming)))
glDisable(GL_FOG);
if (!reallyUseFogHack) {
float density = 0.0f;
const GLfloat* color = NULL;
if (useDimming) {
density = dimDensity;
color = dimnessColor;
}
else if (teleporterProximity > 0.0f) {
density = (teleporterProximity > 0.75f) ?
1.0f : teleporterProximity / 0.75f;
color = blindnessColor;
}
if (density > 0.0f && color != NULL) {
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glColor4f(color[0], color[1], color[2], density);
glRectf(-1.0f, -1.0f, 1.0f, 1.0f);
}
}
if (useDepthComplexityOn) {
static const GLfloat depthColors[][3] = {
{ 0.0f, 0.0f, 0.0f }, // black -- 0 times
{ 0.5f, 0.0f, 1.0f }, // purple -- 1 time
{ 0.0f, 0.0f, 1.0f }, // blue -- 2 times
{ 0.0f, 1.0f, 1.0f }, // cyan -- 3 times
{ 0.0f, 1.0f, 0.0f }, // green -- 4 times
{ 1.0f, 1.0f, 0.0f }, // yellow -- 5 times
{ 1.0f, 0.5f, 0.0f }, // orange -- 6 times
{ 1.0f, 0.0f, 0.0f } // red -- 7 or more
};
static const int numColors = countof(depthColors);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
for (i = 0; i < numColors; i++) {
glStencilFunc(i == numColors - 1 ? GL_LEQUAL : GL_EQUAL, i, 0xf);
glColor3fv(depthColors[i]);
glRectf(-1.0f, -1.0f, 1.0f, 1.0f);
}
glDisable(GL_STENCIL_TEST);
}
}
