shd8bumpdiff.cpp

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/*
**  Command & Conquer Generals Zero Hour(tm)
**  Copyright 2025 Electronic Arts Inc.
**
**  This program is free software: you can redistribute it and/or modify
**  it under the terms of the GNU General Public License as published by
**  the Free Software Foundation, either version 3 of the License, or
**  (at your option) any later version.
**
**  This program is distributed in the hope that it will be useful,
**  but WITHOUT ANY WARRANTY; without even the implied warranty of
**  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
**  GNU General Public License for more details.
**
**  You should have received a copy of the GNU General Public License
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
 
 /***********************************************************************************************
 ***              C O N F I D E N T I A L  ---  W E S T W O O D  S T U D I O S               ***
 ***********************************************************************************************
 *                                                                                             *
 *                 Project Name : WWSHADE                                                         *
 *                                                                                             *
 *                     $Archive:: wwshade/shd8bumpdiff.cpp                           $*
 *                                                                                             *
 *                      $Author:: Kenny_m
 *                                                                                                                                  
 *                            $Modtime:: 07/08/02 3:40p                                               $*
 *                                                                                             *
 *                    $Revision:: 1                                                          $*
 *                                                                                             *
 *---------------------------------------------------------------------------------------------*
 * Functions:                                                                                  *
 * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 
#include "dx8fvf.h"
#include "dx8wrapper.h"
#include "assetmgr.h"
#include "rinfo.h"
#include "camera.h"
#include "shdmesh.h"
#include "texproject.h"
 
#include "shdbumpdiff.h"
#include "shd8bumpdiff.h"
#include "shd8bumpdiff_constants.h"
#include "shdclassids.h"
 
// shader code declarations
#include "shd8bumpdiff.vsh_code.h"
#include "shd8bumpdiff.psh_code.h"
#include "shd8ssbumpdiff.vsh_code.h"
#include "shd8ssbumpdiff.psh_code.h"
 
 
ShdHWVertexShader      Shd8BumpDiffClass::Vertex_Shader;
ShdHWPixelShader        Shd8BumpDiffClass::Pixel_Shader;
ShdHWPixelShader        Shd8BumpDiffClass::Self_Shadow_Pixel_Shader;
ShdHWVertexShader      Shd8BumpDiffClass::Self_Shadow_Vertex_Shader;
Matrix4x4              Shd8BumpDiffClass::View_Projection_Matrix;
 
Shd8BumpDiffClass::Shd8BumpDiffClass(const ShdDefClass* def)
:   ShdInterfaceClass(def,SHDDEF_CLASSID_BUMPDIFF),
    Texture(NULL),
    NormalMap(NULL)
{
    ShdBumpDiffDefClass* Definition=(ShdBumpDiffDefClass*)def;
 
    Texture=WW3DAssetManager::Get_Instance()->Get_Texture
    (
        Definition->Get_Texture_Name()
    );
 
    NormalMap=WW3DAssetManager::Get_Instance()->Get_Texture
    (
        Definition->Get_Bump_Map_Name()
    );
 
    const Vector3& a=Definition->Get_Ambient();
    Ambient.Set(a.X,a.Y,a.Z,0.0f);
 
    const Vector3& d=Definition->Get_Diffuse();
    Diffuse.Set(d.X,d.Y,d.Z,0.0f);
 
    const Vector2& db=Definition->Get_Diffuse_Bumpiness();
    Bumpiness.Set(db.X,db.Y,0,0);
}
 
Shd8BumpDiffClass::~Shd8BumpDiffClass(void)
{
    REF_PTR_RELEASE(Texture);
    REF_PTR_RELEASE(NormalMap);
}
 
void Shd8BumpDiffClass::Init(void)
{
    // Create vertex shader
    DWORD vertex_shader_declaration[]=
    {
        D3DVSD_STREAM(0),
        (D3DVSD_REG(0, D3DVSDT_FLOAT3)), // vertex position
        (D3DVSD_REG(1, D3DVSDT_FLOAT3)), // vertex normal
        (D3DVSD_REG(2, D3DVSDT_D3DCOLOR)), // vertex color
        (D3DVSD_REG(3, D3DVSDT_FLOAT2)), // vertex texture coords
        (D3DVSD_REG(4, D3DVSDT_FLOAT3)), // vertex S basis
        (D3DVSD_REG(5, D3DVSDT_FLOAT3)), // vertex T basis
        (D3DVSD_REG(6, D3DVSDT_FLOAT3)), // vertex SxT basis
        D3DVSD_END()
    };
 
    Pixel_Shader.Create(shd8bumpdiff_psh_code);
 
    Vertex_Shader.Create
    (
        shd8bumpdiff_vsh_code,
        vertex_shader_declaration
    );
 
    Self_Shadow_Pixel_Shader.Create(shd8ssbumpdiff_psh_code);
    Self_Shadow_Vertex_Shader.Create
    (
        shd8ssbumpdiff_vsh_code,
        vertex_shader_declaration
    );
}
 
void Shd8BumpDiffClass::Shutdown(void)
{
    Vertex_Shader.Destroy();
    Pixel_Shader.Destroy();
    Self_Shadow_Pixel_Shader.Destroy();
    Self_Shadow_Vertex_Shader.Destroy();
}
 
void Shd8BumpDiffClass::Apply_Shared(int cur_pass, RenderInfoClass& rinfo)
{
    // set vertex shader
    if (cur_pass==0)
    {
        DX8Wrapper::Set_Vertex_Shader(Vertex_Shader.Peek_Shader());
    }
    else
    {
        DX8Wrapper::Set_Vertex_Shader(Self_Shadow_Vertex_Shader.Peek_Shader());
    }
 
    // set vertex shader constants
    DX8Wrapper::Set_Vertex_Shader_Constant(CV_CONST, D3DXVECTOR4(0.0f, 1.0f, 0.5f, 2.0f), 1);
 
    // set pixel shader
    if (cur_pass==0)
    {
        DX8Wrapper::Set_Pixel_Shader(Pixel_Shader.Peek_Shader());
    }
    else
    {
        DX8Wrapper::Set_Pixel_Shader(Self_Shadow_Pixel_Shader.Peek_Shader());
    }
 
    // set constants
    DX8Wrapper::Set_Vertex_Shader_Constant(CV_CONST, D3DXVECTOR4(0.0f, 1.0f, 0.5f, 2.0f), 1);
 
    // calculate shader view projection matrix
    Matrix4x4 view_matrix;
    DX8Wrapper::Get_Transform(D3DTS_VIEW, view_matrix);
 
    Matrix4x4 proj_matrix;
    DX8Wrapper::Get_Transform(D3DTS_PROJECTION, proj_matrix);
 
    Matrix4x4::Multiply(proj_matrix, view_matrix, &View_Projection_Matrix);
}
 
void Shd8BumpDiffClass::Apply_Instance(int cur_pass, RenderInfoClass& rinfo)
{
    if (cur_pass==0)
    {
        DX8Wrapper::Set_Texture(0, NormalMap);
        DX8Wrapper::Set_Texture(1, Texture);
    }
    else
    {
        ZTextureClass* ztex=DX8Wrapper::Get_Shadow_Map(0);
 
 
        DX8Wrapper::Set_Texture(0, Texture);
 
        DX8Wrapper::Set_Vertex_Shader_Constant(CV_TEXMAP,&Self_Shadow_Transform,4);
    }
 
    // set vertex shader constants
    Matrix4x4 world;
    DX8Wrapper::Get_Transform(D3DTS_WORLD, world);
 
    Matrix4x4 world_view_proj_matrix;
 
    Matrix4x4::Multiply(View_Projection_Matrix,world,&world_view_proj_matrix);
 
    DX8Wrapper::Set_Vertex_Shader_Constant(CV_WORLD_VIEW_PROJECTION, &world_view_proj_matrix, 4);
    DX8Wrapper::Set_Vertex_Shader_Constant(CV_WORLD, &world, 4);
 
    ShdHWVertexShader::Light
    (
        rinfo,
        Ambient,
        Diffuse
    );
 
    DX8Wrapper::Set_Vertex_Shader_Constant(CV_BUMPINESS, &Bumpiness, 1);
}
 
unsigned Shd8BumpDiffClass::Get_Vertex_Stream_Count() const
{
    return 1;
}
 
unsigned Shd8BumpDiffClass::Get_Vertex_Size(unsigned stream) const
{
    return sizeof(VertexFormatXYZNDUV1TG3);
}
 
void Shd8BumpDiffClass::Copy_Vertex_Stream
(
    unsigned stream, 
    void* dest_buffer, 
    const VertexStreamStruct& vss, 
    unsigned vertex_count
)
{
   VertexFormatXYZNDUV1TG3* verts=(VertexFormatXYZNDUV1TG3*)dest_buffer;
 
    for (unsigned i=0; i<vertex_count; ++i) 
    {
        if (vss.Locations) 
        {
            verts[i].x=vss.Locations[i][0];
            verts[i].y=vss.Locations[i][1];
            verts[i].z=vss.Locations[i][2];
        }
        else 
        {
            verts[i].x=0.0f;
            verts[i].y=0.0f;
            verts[i].z=0.0f;
        }
 
        if (vss.DiffuseInt) 
        {
            verts[i].diffuse=vss.DiffuseInt[i];
        }
        else 
        {
            verts[i].diffuse=0xffffffff;
        }
    
        if (vss.Normals) 
        {
            verts[i].nx=vss.Normals[i][0];
            verts[i].ny=vss.Normals[i][1];
            verts[i].nz=vss.Normals[i][2];
        }
        else 
        {
            verts[i].nx=0.0f;
            verts[i].ny=0.0f;
            verts[i].nz=0.0f;
        }
 
        if (vss.UV[0])
        {
            verts[i].u1=vss.UV[0][i].U;
            verts[i].v1=vss.UV[0][i].V;
        }
        else 
        {
            verts[i].u1=0.0f;
            verts[i].v1=0.0f;
        }
 
        if (vss.S)
        {
            verts[i].Sx=vss.S[i].X;
            verts[i].Sy=vss.S[i].Y;
            verts[i].Sz=vss.S[i].Z;
        }
        else
        {
            verts[i].Sx=0.0f;
            verts[i].Sy=0.0f;
            verts[i].Sz=0.0f;
        }
 
        if (vss.T)
        {
            verts[i].Tx=vss.T[i].X;
            verts[i].Ty=vss.T[i].Y;
            verts[i].Tz=vss.T[i].Z;
        }
        else
        {
            verts[i].Tx=0.0f;
            verts[i].Ty=0.0f;
            verts[i].Tz=0.0f;
        }
 
        if (vss.SxT)
        {
            verts[i].SxTx=vss.SxT[i].X;
            verts[i].SxTy=vss.SxT[i].Y;
            verts[i].SxTz=vss.SxT[i].Z;
        }
        else
        {
            verts[i].SxTx=0.0f;
            verts[i].SxTy=0.0f;
            verts[i].SxTz=0.0f;
        }
    }
}
 
bool Shd8BumpDiffClass::Pass_Selection
(
    ShdMeshClass* mesh, 
    RenderInfoClass* rinfo,
    int pass
)
{
    if (mesh->Is_Applying_Shadow_Map())
    {
        if (pass==1) // just do once
        {
            // is rendering self shadowed object
            Setup_Self_Shadow_Info(*mesh,*rinfo);
        }
        return (pass==1);
    }
 
    return (pass==0);
}
 
 
/**********************************************************************************************

void Shd8BumpDiffClass::Setup_Self_Shadow_Info(ShdMeshClass& mesh, RenderInfoClass& rinfo)
{
    Matrix4x4 tex_mat=mesh.Peek_Texture_Projector()->Peek_Mapper()->Get_Texture_Transform();
 
    //set special texture matrix for shadow mapping
    ZTextureClass* smap=DX8Wrapper::Get_Shadow_Map(0); // todo KJM assign shadow map from rinfo
 
    if (!smap) return;
 
    float off_x=0.5f+(0.5f/(float)smap->Get_Width());
    float off_y=0.5f+(0.5f/(float)smap->Get_Height());
 
    unsigned int bits=Get_Num_Depth_Bits(smap->Get_Texture_Format());
    float range=(float)(0xFFFFFFFF>>(32-bits));
    float bias=0.0f;//-0.001f*range;
    Matrix4x4 sb_mat
    (
        Vector4(0.5f,     0.0f,     0.0f,    0.0f),
        Vector4(0.0f,    -0.5f,     0.0f,    0.0f),
        Vector4(0.0f,     0.0f,    range,    0.0f),
        Vector4(off_x,     off_y,        bias,   1.0f) 
    );
 
    Matrix4x4 view2tex;
    Matrix4x4::Multiply(sb_mat,tex_mat,&view2tex);
 
    Matrix4x4 world;
    world.Init(mesh.Get_Transform());
 
    Matrix4x4 view;
    view.Init(rinfo.Camera.Get_View_Matrix());
 
    Matrix4x4 vw_mat;
    Matrix4x4::Multiply(world,view,&vw_mat);
 
    Matrix4x4::Multiply(view2tex,vw_mat,&Self_Shadow_Transform);
}