/*
* Render all states in the ShaderCache along with their renderables. This
* is where the actual OpenGL rendering starts.
*/
void OpenGLRenderSystem::render(RenderStateFlags globalstate,
const Matrix4& modelview,
const Matrix4& projection,
const Vector3& viewer)
{
glPushAttrib(GL_ALL_ATTRIB_BITS);
// Set the projection and modelview matrices
glMatrixMode(GL_PROJECTION);
glLoadMatrixd(projection);
glMatrixMode(GL_MODELVIEW);
glLoadMatrixd(modelview);
// global settings that are not set in renderstates
glFrontFace(GL_CW);
glCullFace(GL_BACK);
glPolygonOffset(-1, 1);
// Set polygon stipple pattern from constant
glPolygonStipple(POLYGON_STIPPLE_PATTERN);
glEnableClientState(GL_VERTEX_ARRAY);
glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
if (GLEW_VERSION_1_3) {
glActiveTexture(GL_TEXTURE0);
glClientActiveTexture(GL_TEXTURE0);
}
if (GLEW_ARB_shader_objects) {
glUseProgramObjectARB(0);
glDisableVertexAttribArrayARB(c_attr_TexCoord0);
glDisableVertexAttribArrayARB(c_attr_Tangent);
glDisableVertexAttribArrayARB(c_attr_Binormal);
}
if (globalstate & RENDER_TEXTURE_2D) {
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
// Construct default OpenGL state
OpenGLState current;
// Set up initial GL state. This MUST MATCH the defaults in the OpenGLState
// object, otherwise required state changes may not occur.
glLineStipple(current.m_linestipple_factor,
current.m_linestipple_pattern);
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glDisable(GL_LIGHTING);
glDisable(GL_TEXTURE_2D);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glDisable(GL_BLEND);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glDisable(GL_CULL_FACE);
glShadeModel(GL_FLAT);
glDisable(GL_DEPTH_TEST);
// RENDER_DEPTHWRITE defaults to 0
glDepthMask(GL_FALSE);
// RENDER_MASKCOLOUR defaults to 0
glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
glDisable(GL_ALPHA_TEST);
glDisable(GL_LINE_STIPPLE);
glDisable(GL_POLYGON_STIPPLE);
glDisable(GL_POLYGON_OFFSET_LINE);
glDisable(GL_POLYGON_OFFSET_FILL); // greebo: otherwise tiny gap lines between brushes are visible
glBindTexture(GL_TEXTURE_2D, 0);
glColor4f(1,1,1,1);
glDepthFunc(current.getDepthFunc());
glAlphaFunc(GL_ALWAYS, 0);
glLineWidth(1);
glPointSize(1);
glHint(GL_FOG_HINT, GL_NICEST);
glDisable(GL_FOG);
#if 0
std::size_t count = 0 ;
for (OpenGLStates::iterator i = _state_sorted.begin();
i != _state_sorted.end();
++i)
{
// Render the OpenGLShaderPass
if (!i->second->empty())
{
count++;
}
}
rMessage() << "R1 " << count << " of " << _state_sorted.size() << "\n";
std::size_t curObject = 0;
#endif
// Iterate over the sorted mapping between OpenGLStates and their
// OpenGLShaderPasses (containing the renderable geometry), and render the
// contents of each bucket. Each pass is passed a reference to the "current"
// state, which it can change.
for (OpenGLStates::iterator i = _state_sorted.begin();
i != _state_sorted.end();
++i)
{
// Render the OpenGLShaderPass
if (!i->second->empty())
{
#if 0
rMessage() << curObject << " " << (*i->second);
curObject++;
#endif
i->second->render(current, globalstate, viewer, _time);
}
}
glPopAttrib();
}
