bool GeoMipMapping::Render()
{
//渲染所有patch
for (int z = 0; z < m_iNumPatchesPerSide; z++)
{
for (int x = 0; x < m_iNumPatchesPerSide; x++)
{
RenderPatch(x, z);
}
}
return true;
}
void Renderer::RenderFace(bsp_face *face) {
const bsp_face ¤t_face = *face;
Shader *shader = shaderLoader::GetShader(current_face.texture);
if (shader->q3_shader_.stages_.size() ==
0) // skip no shader / no draw. should be sorted out before.
{
return;
}
// does everything in here need to be done every time? move into the
// conditional below?
SetupShader(shader, current_face.lm_index);
if (current_shader_ != shader) {
glUseProgram(shader->shader_);
current_shader_ = shader;
}
if (shader->time_idx_ != -1) {
glUniform1f(shader->time_idx_, time_);
}
glUniformMatrix4fv(shader->projection_idx_, 1, false,
glm::value_ptr(projectionmatrix_));
glUniformMatrix4fv(shader->model_idx_, 1, false,
glm::value_ptr(modelmatrix_));
if (current_face.type == POLYGON || current_face.type == MESH) {
// RenderPolygon(face);
} else if (current_face.type == PATCH) {
RenderPatch(face);
} else if (current_face.type == BILLBOARD) {
// RenderBillboard();
}
}
//--------------------------------------------------------------
// Name: CGEOMIPMAPPING::Render - public
// Description: Render the geomipmapping system
// Arguments: None
// Return Value: None
//--------------------------------------------------------------
void CGEOMIPMAPPING::Render( void )
{
int x, z;
//reset the counting variables
m_iPatchesPerFrame = 0;
m_iVertsPerFrame= 0;
m_iTrisPerFrame = 0;
//enable back-face culling
glEnable( GL_CULL_FACE );
//render the multitexturing terrain
if( m_bMultitexture && m_bDetailMapping && m_bTextureMapping )
{
glDisable( GL_BLEND );
//bind the primary color texture to the first texture unit
glActiveTextureARB( GL_TEXTURE0_ARB );
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, m_texture.GetID( ) );
//bind the detail color texture to the second texture unit
glActiveTextureARB( GL_TEXTURE1_ARB );
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, m_detailMap.GetID( ) );
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB );
glTexEnvi( GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 2 );
//render the patches
for( z=0; z<m_iNumPatchesPerSide; z++ )
{
for( x=0; x<m_iNumPatchesPerSide; x++ )
{
if( m_pPatches[GetPatchNumber( x, z )].m_bVisible )
{
RenderPatch( x, z, true, true );
m_iPatchesPerFrame++;
}
}
}
}
//no hardware multitexturing available, or the user only wants to render
//the detail texture or the color texture
else
{
if( m_bTextureMapping )
{
//bind the primary color texture (FOR THE PRIMARY TEXTURE PASS)
glActiveTextureARB( GL_TEXTURE0_ARB );
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, m_texture.GetID( ) );
//render the color texture
for( z=0; z<m_iNumPatchesPerSide; z++ )
{
for( x=0; x<m_iNumPatchesPerSide; x++ )
{
if( m_pPatches[GetPatchNumber( x, z )].m_bVisible )
{
RenderPatch( x, z, true, true );
m_iPatchesPerFrame++;
}
}
}
}
if( !( m_bTextureMapping && !m_bDetailMapping ) )
{
//if the user wants detail mapping, we need to set some things up
if( m_bDetailMapping )
{
//bind the detail texture
glActiveTextureARB( GL_TEXTURE0_ARB );
glEnable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, m_detailMap.GetID( ) );
//only use blending if a texture pass was made
if( m_bTextureMapping )
{
glEnable( GL_BLEND );
glBlendFunc( GL_ZERO, GL_SRC_COLOR );
}
}
//render either the detail map on top of the texture,
//only the detail map, or neither
for( z=0; z<m_iNumPatchesPerSide; z++ )
{
for( x=0; x<m_iNumPatchesPerSide; x++ )
{
if( m_pPatches[GetPatchNumber( x, z )].m_bVisible )
{
RenderPatch( x, z, true, true );
m_iPatchesPerFrame++;
}
}
}
}
}
glDisable( GL_BLEND );
//unbind the texture occupying the second texture unit
glActiveTextureARB( GL_TEXTURE1_ARB );
glDisable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, 0 );
//unbind the texture occupying the first texture unit
glActiveTextureARB( GL_TEXTURE0_ARB );
glDisable( GL_TEXTURE_2D );
glBindTexture( GL_TEXTURE_2D, 0 );
}