void StencilShadow::RenderShadow()
{
#ifndef DISABLE_STENCILSHADOW
DWORD lighting, fog, srcblend, destblend, alphablend, zwrite, zfunc, cullmode;
GL_State(GLS_DEFAULT);
glw_state->device->GetRenderState( D3DRS_LIGHTING, &lighting );
glw_state->device->GetRenderState( D3DRS_FOGENABLE, &fog );
glw_state->device->GetRenderState( D3DRS_SRCBLEND, &srcblend );
glw_state->device->GetRenderState( D3DRS_DESTBLEND, &destblend );
glw_state->device->GetRenderState( D3DRS_ALPHABLENDENABLE, &alphablend );
glw_state->device->GetRenderState( D3DRS_ZWRITEENABLE, &zwrite );
glw_state->device->GetRenderState( D3DRS_ZFUNC, &zfunc );
glw_state->device->GetRenderState( D3DRS_CULLMODE, &cullmode );
pVerts = NULL;
pExtrusions = NULL;
GL_Bind( tr.whiteImage );
glw_state->device->SetRenderState( D3DRS_LIGHTING, FALSE );
glw_state->device->SetRenderState( D3DRS_FOGENABLE, FALSE );
glw_state->device->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_ONE );
glw_state->device->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_ZERO );
// Disable z-buffer writes (note: z-testing still occurs), and enable the
// stencil-buffer
glw_state->device->SetRenderState( D3DRS_ZWRITEENABLE, FALSE );
glw_state->device->SetRenderState( D3DRS_STENCILENABLE, TRUE );
// Don't bother with interpolating color
glw_state->device->SetRenderState( D3DRS_SHADEMODE, D3DSHADE_FLAT );
glw_state->device->SetRenderState( D3DRS_ZFUNC, D3DCMP_LESS );
// Set up stencil compare function, reference value, and masks.
// Stencil test passes if ((ref & mask) cmpfn (stencil & mask)) is true.
// Note: since we set up the stencil-test to always pass, the STENCILFAIL
// renderstate is really not needed.
glw_state->device->SetRenderState( D3DRS_STENCILFUNC, D3DCMP_ALWAYS );
#ifdef _STENCIL_REVERSE
glw_state->device->SetRenderState( D3DRS_STENCILZFAIL, D3DSTENCILOP_INCR );
glw_state->device->SetRenderState( D3DRS_STENCILFAIL, D3DSTENCILOP_KEEP );
glw_state->device->SetRenderState( D3DRS_STENCILPASS, D3DSTENCILOP_KEEP );
#else
glw_state->device->SetRenderState( D3DRS_STENCILZFAIL, D3DSTENCILOP_KEEP );
glw_state->device->SetRenderState( D3DRS_STENCILFAIL, D3DSTENCILOP_KEEP );
glw_state->device->SetRenderState( D3DRS_STENCILPASS, D3DSTENCILOP_INCR );
#endif
// If ztest passes, inc/decrement stencil buffer value
glw_state->device->SetRenderState( D3DRS_STENCILREF, 0x1 );
glw_state->device->SetRenderState( D3DRS_STENCILMASK, 0x7f ); //0xffffffff );
glw_state->device->SetRenderState( D3DRS_STENCILWRITEMASK, 0x7f ); //0xffffffff );
// Make sure that no pixels get drawn to the frame buffer
glw_state->device->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE );
glw_state->device->SetRenderState( D3DRS_COLORWRITEENABLE, 0 );
glw_state->device->SetTexture(0, NULL);
glw_state->device->SetTexture(1, NULL);
// Compute the matrix set
XGMATRIX matComposite, matProjectionViewport, matWorld;
glw_state->device->GetProjectionViewportMatrix( &matProjectionViewport );
XGMatrixMultiply( &matComposite, (XGMATRIX*)glw_state->matrixStack[glwstate_t::MatrixMode_Model]->GetTop(), &matProjectionViewport );
// Transpose and set the composite matrix.
XGMatrixTranspose( &matComposite, &matComposite );
glw_state->device->SetVertexShaderConstant( CV_WORLDVIEWPROJ_0, &matComposite, 4 );
// Set viewport offsets.
float fViewportOffsets[4] = { 0.53125f, 0.53125f, 0.0f, 0.0f };
glw_state->device->SetVertexShaderConstant( CV_VIEWPORT_OFFSETS, &fViewportOffsets, 1 );
glw_state->device->SetVertexShader(m_dwVertexShaderShadow);
#ifdef _STENCIL_REVERSE
qglCullFace( GL_FRONT );
#else
qglCullFace( GL_BACK );
#endif
BuildEdges();
// Draw front-side of shadow volume in stencil/z only
if(m_nIndexes)
renderObject_Shadow( D3DPT_QUADLIST, m_nIndexes, m_shadowIndexes );
#ifdef _STENCIL_REVERSE
if(m_nIndexesCap)
renderObject_Shadow( D3DPT_TRIANGLELIST, m_nIndexesCap, m_shadowIndexesCap );
#endif
// Now reverse cull order so back sides of shadow volume are written.
#ifdef _STENCIL_REVERSE
qglCullFace( GL_BACK );
#else
qglCullFace( GL_FRONT );
#endif
// Decrement stencil buffer value
#ifdef _STENCIL_REVERSE
glw_state->device->SetRenderState( D3DRS_STENCILZFAIL, D3DSTENCILOP_DECR );
#else
glw_state->device->SetRenderState( D3DRS_STENCILPASS, D3DSTENCILOP_DECR );
#endif
// Draw back-side of shadow volume in stencil/z only
if(m_nIndexes)
renderObject_Shadow( D3DPT_QUADLIST, m_nIndexes, m_shadowIndexes );
#ifdef _STENCIL_REVERSE
if(m_nIndexesCap)
renderObject_Shadow( D3DPT_TRIANGLELIST, m_nIndexesCap, m_shadowIndexesCap );
#endif
// Restore render states
glw_state->device->SetRenderState( D3DRS_COLORWRITEENABLE, D3DCOLORWRITEENABLE_ALL );
glw_state->device->SetRenderState( D3DRS_SHADEMODE, D3DSHADE_GOURAUD );
glw_state->device->SetRenderState( D3DRS_STENCILENABLE, FALSE );
glw_state->device->SetRenderState( D3DRS_LIGHTING, lighting );
glw_state->device->SetRenderState( D3DRS_FOGENABLE, fog );
glw_state->device->SetRenderState( D3DRS_SRCBLEND, srcblend );
glw_state->device->SetRenderState( D3DRS_DESTBLEND, destblend );
glw_state->device->SetRenderState( D3DRS_ALPHABLENDENABLE, alphablend );
glw_state->device->SetRenderState( D3DRS_ZWRITEENABLE, zwrite );
glw_state->device->SetRenderState( D3DRS_ZFUNC, zfunc );
glw_state->device->SetRenderState( D3DRS_CULLMODE, cullmode );
#endif
}
void setup_weighted_mesh_vertex_shader( void *p_root_matrix, void *p_bone_matrices, int num_bone_matrices )
{
XGMATRIX dest_matrix;
XGMATRIX inverse_view_matrix;
XGMATRIX temp_matrix;
XGMATRIX projMatrix;
XGMATRIX viewMatrix;
XGMATRIX worldMatrix;
// Projection matrix.
XGMatrixTranspose( &projMatrix, &EngineGlobals.projection_matrix );
// View matrix.
XGMatrixTranspose( &viewMatrix, &EngineGlobals.view_matrix );
viewMatrix.m[3][0] = 0.0f;
viewMatrix.m[3][1] = 0.0f;
viewMatrix.m[3][2] = 0.0f;
viewMatrix.m[3][3] = 1.0f;
// World space transformation matrix. (3x3 rotation plus 3 element translation component).
worldMatrix.m[0][0] = ((float*)p_root_matrix )[0];
worldMatrix.m[0][1] = ((float*)p_root_matrix )[1];
worldMatrix.m[0][2] = ((float*)p_root_matrix )[2];
worldMatrix.m[0][3] = ((float*)p_root_matrix )[3];
worldMatrix.m[1][0] = ((float*)p_root_matrix )[4];
worldMatrix.m[1][1] = ((float*)p_root_matrix )[5];
worldMatrix.m[1][2] = ((float*)p_root_matrix )[6];
worldMatrix.m[1][3] = ((float*)p_root_matrix )[7];
worldMatrix.m[2][0] = ((float*)p_root_matrix )[8];
worldMatrix.m[2][1] = ((float*)p_root_matrix )[9];
worldMatrix.m[2][2] = ((float*)p_root_matrix )[10];
worldMatrix.m[2][3] = ((float*)p_root_matrix )[11];
worldMatrix.m[3][0] = 0.0f;
worldMatrix.m[3][1] = 0.0f;
worldMatrix.m[3][2] = 0.0f;
worldMatrix.m[3][3] = 1.0f;
// Calculate composite world->view->projection matrix.
XGMatrixMultiply( &temp_matrix, &viewMatrix, &worldMatrix );
XGMatrixMultiply( &dest_matrix, &projMatrix, &temp_matrix );
// Switch to 192 constant mode, removing the lock on the reserved constants c-38 and c-37.
// D3DDevice_SetShaderConstantMode( D3DSCM_192CONSTANTS | D3DSCM_NORESERVEDCONSTANTS );
// Load up the combined world, camera & projection matrix.
D3DDevice_SetVertexShaderConstantFast( VSCONST_REG_TRANSFORM_OFFSET, (void*)&dest_matrix, VSCONST_REG_TRANSFORM_SIZE );
D3DDevice_SetVertexShaderConstantFast( VSCONST_REG_WORLD_TRANSFORM_OFFSET, (void*)&worldMatrix, VSCONST_REG_WORLD_TRANSFORM_SIZE );
// We want to transform the light directions by the inverse of the world transform - this means we don't have to transform
// the normal by the world transform for every vertex in the vertex shader. However, the function D3DXVec3TransformNormal
// (used below) does the inverse transform for us, so need to actually figure the inverse...
// XGMATRIX inverse_world_transform = worldMatrix;
// D3DXMatrixInverse( &inverse_world_transform, NULL, &worldMatrix );
float directional_light_color[24];
CopyMemory( directional_light_color, EngineGlobals.directional_light_color, sizeof( float ) * 24 );
XGVec3TransformNormal((XGVECTOR3*)&directional_light_color[0], (XGVECTOR3*)&EngineGlobals.directional_light_color[0], &worldMatrix );
XGVec3TransformNormal((XGVECTOR3*)&directional_light_color[8], (XGVECTOR3*)&EngineGlobals.directional_light_color[8], &worldMatrix );
XGVec3TransformNormal((XGVECTOR3*)&directional_light_color[16], (XGVECTOR3*)&EngineGlobals.directional_light_color[16], &worldMatrix );
XGVec3Normalize((XGVECTOR3*)&directional_light_color[0], (XGVECTOR3*)&directional_light_color[0] );
XGVec3Normalize((XGVECTOR3*)&directional_light_color[8], (XGVECTOR3*)&directional_light_color[8] );
XGVec3Normalize((XGVECTOR3*)&directional_light_color[16], (XGVECTOR3*)&directional_light_color[16] );
// Load up the directional light data.
D3DDevice_SetVertexShaderConstantFast( VSCONST_REG_DIR_LIGHT_OFFSET, (void*)directional_light_color, 6 );
// Load up the ambient light color.
D3DDevice_SetVertexShaderConstantFast( VSCONST_REG_AMB_LIGHT_OFFSET, (void*)EngineGlobals.ambient_light_color, 1 );
// Calculate and load up the model-relative camera position.
EngineGlobals.model_relative_cam_position = XGVECTOR3( EngineGlobals.cam_position.x - worldMatrix.m[0][3],
EngineGlobals.cam_position.y - worldMatrix.m[1][3],
EngineGlobals.cam_position.z - worldMatrix.m[2][3] );
XGVec3TransformNormal( &EngineGlobals.model_relative_cam_position, &EngineGlobals.model_relative_cam_position, &worldMatrix );
float specular_attribs[4] = { EngineGlobals.model_relative_cam_position.x,
EngineGlobals.model_relative_cam_position.y,
EngineGlobals.model_relative_cam_position.z,
0.0f };
D3DDevice_SetVertexShaderConstantFast( VSCONST_REG_CAM_POS_OFFSET, (void*)&specular_attribs, 1 );
// Safety check here to limit number of bones to that available.
if( num_bone_matrices > 55 )
{
num_bone_matrices = 55;
}
DWORD* p_bone_element = (DWORD*)p_bone_matrices;
// Begin state block to set vertex shader constants for bone transforms.
DWORD *p_push;
EngineGlobals.p_Device->BeginState(( num_bone_matrices * ( 12 + 1 )) + 3, &p_push );
// 1 here isn't the parameter for SET_TRANSFORM_CONSTANT_LOAD; rather, it's the number of dwords written to that register.
p_push[0] = D3DPUSH_ENCODE( D3DPUSH_SET_TRANSFORM_CONSTANT_LOAD, 1 );
// Here is the actual parameter for SET_TRANSFORM_CONSTANT_LOAD. Always add 96 to the constant register.
p_push[1] = VSCONST_REG_MATRIX_OFFSET + 96;
p_push += 2;
while( num_bone_matrices > 0 )
{
// A 3x4 matrix is 12 dwords. You can encode a maximum of 32 dwords to D3DPUSH_SET_TRANSFORM_CONSTANT before needing another D3DPUSH_ENCODE.
p_push[0] = D3DPUSH_ENCODE( D3DPUSH_SET_TRANSFORM_CONSTANT, 12 );
p_push[1] = p_bone_element[0];
p_push[2] = p_bone_element[4];
p_push[3] = p_bone_element[8];
p_push[4] = p_bone_element[12];
p_push[5] = p_bone_element[1];
p_push[6] = p_bone_element[5];
p_push[7] = p_bone_element[9];
p_push[8] = p_bone_element[13];
p_push[9] = p_bone_element[2];
p_push[10] = p_bone_element[6];
p_push[11] = p_bone_element[10];
p_push[12] = p_bone_element[14];
--num_bone_matrices;
p_bone_element += 16;
p_push += 13;
}
EngineGlobals.p_Device->EndState( p_push );
// Load up the replacement registers for c-38 and c-37
// The z value is 2^24 - to take 1.0f to the max z buffer value for a 24bit z buffer.
static float homogenous_to_screen_reg[8] = { 320.0f, -240.0f, 1.6777215e7f, 0.0f, 320.53125f, 240.53125f, 0.0f, 0.0f };
if( EngineGlobals.is_orthographic )
{
homogenous_to_screen_reg[0] = 128.0f;
homogenous_to_screen_reg[1] = -128.0f;
homogenous_to_screen_reg[2] = 1.6777215e7f;
homogenous_to_screen_reg[4] = 128.53125f;
homogenous_to_screen_reg[5] = 128.53125f;
}
else
{
homogenous_to_screen_reg[0] = (float)EngineGlobals.viewport.Width * 0.5f;
homogenous_to_screen_reg[1] = (float)EngineGlobals.viewport.Height * -0.5f;
homogenous_to_screen_reg[2] = ( EngineGlobals.zstencil_depth == 16 ) ? 65535.0f : 1.6777215e7f;
homogenous_to_screen_reg[4] = (float)NxXbox::EngineGlobals.viewport.X + ((float)NxXbox::EngineGlobals.viewport.Width * 0.5f ) + 0.53125f;
homogenous_to_screen_reg[5] = (float)NxXbox::EngineGlobals.viewport.Y + ((float)NxXbox::EngineGlobals.viewport.Height * 0.5f ) + 0.53125f;
}
D3DDevice_SetVertexShaderConstantFast( 94, (void*)homogenous_to_screen_reg, 2 );
}