source/renderer/RenderModifiers.cpp

   1 /* Copyright (C) 2012 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * Implementation of common RenderModifiers
  20  */
  21
  22 #include "precompiled.h"
  23
  24 #include "lib/ogl.h"
  25 #include "maths/Vector3D.h"
  26 #include "maths/Vector4D.h"
  27 #include "maths/Matrix3D.h"
  28
  29 #include "ps/Game.h"
  30
  31 #include "graphics/GameView.h"
  32 #include "graphics/LightEnv.h"
  33 #include "graphics/LOSTexture.h"
  34 #include "graphics/Model.h"
  35 #include "graphics/TextureManager.h"
  36
  37 #include "renderer/RenderModifiers.h"
  38 #include "renderer/Renderer.h"
  39 #include "renderer/ShadowMap.h"
  40
  41 #include <boost/algorithm/string.hpp>
  42
  43 ///////////////////////////////////////////////////////////////////////////////////////////////
  44 // LitRenderModifier implementation
  45
  46 LitRenderModifier::LitRenderModifier()
  47         : m_Shadow(0), m_LightEnv(0)
  48 {
  49 }
  50
  51 LitRenderModifier::~LitRenderModifier()
  52 {
  53 }
  54
  55 // Set the shadow map for subsequent rendering
  56 void LitRenderModifier::SetShadowMap(const ShadowMap* shadow)
  57 {
  58         m_Shadow = shadow;
  59 }
  60
  61 // Set the light environment for subsequent rendering
  62 void LitRenderModifier::SetLightEnv(const CLightEnv* lightenv)
  63 {
  64         m_LightEnv = lightenv;
  65 }
  66
  67 ///////////////////////////////////////////////////////////////////////////////////////////////
  68 // ShaderRenderModifier implementation
  69
  70 ShaderRenderModifier::ShaderRenderModifier()
  71 {
  72 }
  73
  74 void ShaderRenderModifier::BeginPass(const CShaderProgramPtr& shader)
  75 {
  76         shader->Uniform(str_transform, g_Renderer.GetViewCamera().GetViewProjection());
  77         shader->Uniform(str_cameraPos, g_Renderer.GetViewCamera().GetOrientation().GetTranslation());
  78
  79         if (GetShadowMap() && shader->GetTextureBinding(str_shadowTex).Active())
  80         {
  81                 shader->BindTexture(str_shadowTex, GetShadowMap()->GetTexture());
  82                 shader->Uniform(str_shadowTransform, GetShadowMap()->GetTextureMatrix());
  83                 int width = GetShadowMap()->GetWidth();
  84                 int height = GetShadowMap()->GetHeight();
  85                 shader->Uniform(str_shadowScale, width, height, 1.0f / width, 1.0f / height);
  86         }
  87
  88         if (GetLightEnv())
  89         {
  90                 shader->Uniform(str_ambient, GetLightEnv()->m_UnitsAmbientColor);
  91                 shader->Uniform(str_sunDir, GetLightEnv()->GetSunDir());
  92                 shader->Uniform(str_sunColor, GetLightEnv()->m_SunColor);
  93
  94                 shader->Uniform(str_fogColor, GetLightEnv()->m_FogColor);
  95                 shader->Uniform(str_fogParams, GetLightEnv()->m_FogFactor, GetLightEnv()->m_FogMax, 0.f, 0.f);
  96         }
  97
  98         if (shader->GetTextureBinding(str_losTex).Active())
  99         {
 100                 CLOSTexture& los = g_Renderer.GetScene().GetLOSTexture();
 101                 shader->BindTexture(str_losTex, los.GetTextureSmooth());
 102                 // Don't bother sending the whole matrix, we just need two floats (scale and translation)
 103                 shader->Uniform(str_losTransform, los.GetTextureMatrix()[0], los.GetTextureMatrix()[12], 0.f, 0.f);
 104         }
 105
 106         m_BindingInstancingTransform = shader->GetUniformBinding(str_instancingTransform);
 107         m_BindingShadingColor = shader->GetUniformBinding(str_shadingColor);
 108         m_BindingPlayerColor = shader->GetUniformBinding(str_playerColor);
 109 }
 110
 111 void ShaderRenderModifier::PrepareModel(const CShaderProgramPtr& shader, CModel* model)
 112 {
 113         if (m_BindingInstancingTransform.Active())
 114                 shader->Uniform(m_BindingInstancingTransform, model->GetTransform());
 115
 116         if (m_BindingShadingColor.Active())
 117                 shader->Uniform(m_BindingShadingColor, model->GetShadingColor());
 118
 119         if (m_BindingPlayerColor.Active())
 120                 shader->Uniform(m_BindingPlayerColor, g_Game->GetPlayerColor(model->GetPlayerID()));
 121 }