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Diffstat (limited to 'engine/gl_warp.cpp')
| -rw-r--r-- | engine/gl_warp.cpp | 352 |
1 files changed, 352 insertions, 0 deletions
diff --git a/engine/gl_warp.cpp b/engine/gl_warp.cpp new file mode 100644 index 0000000..881ac7a --- /dev/null +++ b/engine/gl_warp.cpp @@ -0,0 +1,352 @@ +//========= Copyright Valve Corporation, All rights reserved. ============// +// +// Purpose: +// +// $NoKeywords: $ +// +//===========================================================================// +// gl_warp.c -- sky and water polygons + +#include "render_pch.h" +#include "gl_water.h" +#include "zone.h" +#include "gl_model_private.h" +#include "gl_matsysiface.h" +#include "utlvector.h" +#include "materialsystem/imesh.h" +#include "materialsystem/imaterial.h" +#include "tier2/tier2.h" +#include "materialsystem/imaterialsystemhardwareconfig.h" +#include "tier0/vprof.h" + +// memdbgon must be the last include file in a .cpp file!!! +#include "tier0/memdbgon.h" + +#define SQRT3INV (0.57735f) // a little less than 1 / sqrt(3) + +static ConVar r_drawskybox( "r_drawskybox", "1", FCVAR_CHEAT ); + +extern ConVar mat_loadtextures; +static IMaterial *skyboxMaterials[6] = { NULL, NULL, NULL, NULL, NULL, NULL }; + +// 1 = s, 2 = t, 3 = 2048 +int st_to_vec[6][3] = +{ + {3,-1,2}, + {-3,1,2}, + + {1,3,2}, + {-1,-3,2}, + + {-2,-1,3}, // 0 degrees yaw, look straight up + {2,-1,-3} // look straight down +}; + +// s = [0]/[2], t = [1]/[2] + +int skytexorder[6] = {0,2,1,3,4,5}; +#define SIGN(d) ((d)<0?-1:1) +static int gFakePlaneType[6] = {1,-1,2,-2,3,-3}; + +// (This is pasted from vtf.cpp - just for reference. It shows how the faces +// of the engine's skybox are oriented and mapped). +// +// The vert ordering is lower-left, top-left, top-right, bottom-right. +// +// These were constructed for the engine skybox, which looks like this +// (assuming X goes forward, Y goes left, and Z goes up). +// +// 6 ------------- 5 +// / / +// / | / | +// / | / | +// 2 ------------- 1 | +// | | +// | | +// | 7 ------|------ 4 +// | / | / +// | / | / +// / / +// 3 ------------- 0 +// +//int g_skybox_rightFaceVerts[4] = { 7, 6, 5, 4 }; +//int g_skybox_leftFaceVerts[4] = { 0, 1, 2, 3 }; +//int g_skybox_backFaceVerts[4] = { 3, 2, 6, 7 }; +//int g_skybox_frontFaceVerts[4] = { 4, 5, 1, 0 }; +//int g_skybox_upFaceVerts[4] = { 6, 2, 1, 5 }; +//int g_skybox_downFaceVerts[4] = { 3, 7, 4, 0 }; + + +//----------------------------------------------------------------------------- +// Purpose: +//----------------------------------------------------------------------------- +void R_UnloadSkys( void ) +{ + int i; + + for ( i = 0; i < 6; i++ ) + { + if( skyboxMaterials[i] ) + { + skyboxMaterials[ i ]->DecrementReferenceCount(); + skyboxMaterials[ i ] = NULL; + } + } +} + +//----------------------------------------------------------------------------- +// Purpose: +// Input : *name - +// Output : Returns true on success, false on failure. +//----------------------------------------------------------------------------- +bool R_LoadNamedSkys( const char *skyname ) +{ + char name[ MAX_OSPATH ]; + IMaterial *skies[ 6 ]; + bool success = true; + const char *skyboxsuffix[ 6 ] = { "rt", "bk", "lf", "ft", "up", "dn" }; + + bool bUseDx8Skyboxes = ( g_pMaterialSystemHardwareConfig->GetDXSupportLevel() < 90 ); + for ( int i = 0; i < 6; i++ ) + { + skies[i] = NULL; + if ( bUseDx8Skyboxes ) + { + Q_snprintf( name, sizeof( name ), "skybox/%s_dx80%s", skyname, skyboxsuffix[i] ); + skies[i] = materials->FindMaterial( name, TEXTURE_GROUP_SKYBOX, false ); + if( IsErrorMaterial( skies[i] ) ) + { + skies[i] = NULL; + } + } + + if ( skies[i] == NULL ) + { + Q_snprintf( name, sizeof( name ), "skybox/%s%s", skyname, skyboxsuffix[i] ); + skies[i] = materials->FindMaterial( name, TEXTURE_GROUP_SKYBOX ); + } + if( !IsErrorMaterial( skies[i] ) ) + continue; + + success = false; + break; + } + + if ( !success ) + { + return false; + } + + // Increment references + for ( int i = 0; i < 6; i++ ) + { + // Unload any old skybox + if ( skyboxMaterials[ i ] ) + { + skyboxMaterials[ i ]->DecrementReferenceCount(); + skyboxMaterials[ i ] = NULL; + } + + // Use the new one + assert( skies[ i ] ); + skyboxMaterials[i] = skies[ i ]; + skyboxMaterials[i]->IncrementReferenceCount(); + } + + return true; +} + +//----------------------------------------------------------------------------- +// Purpose: +//----------------------------------------------------------------------------- +void R_LoadSkys( void ) +{ + bool success = true; + + char requestedsky[ 128 ]; + + ConVarRef skyname( "sv_skyname" ); + if ( skyname.IsValid() ) + { + Q_strncpy( requestedsky, skyname.GetString(), sizeof( requestedsky ) ); + } + else + { + ConDMsg( "Unable to find skyname ConVar!!!\n" ); + return; + } + + // See if user's sky will work + if ( !R_LoadNamedSkys( requestedsky ) ) + { + // Assume failure + success = false; + + // See if user requested other than the default + if ( Q_stricmp( requestedsky, "sky_urb01" ) ) + { + // Try the default + skyname.SetValue( "sky_urb01" ); + + // See if we could load that one now + if ( R_LoadNamedSkys( skyname.GetString() ) ) + { + ConDMsg( "Unable to load sky %s, but successfully loaded %s\n", requestedsky, skyname.GetString() ); + success = true; + } + } + } + + if ( !success ) + { + ConDMsg( "Unable to load sky %s\n", requestedsky ); + } +} + +//----------------------------------------------------------------------------- +// Purpose: +//----------------------------------------------------------------------------- +#pragma warning (disable : 4701) +void MakeSkyVec( float s, float t, int axis, float zFar, Vector& position, Vector2D &texCoord ) +{ + Vector v, b; + int j, k; + float width; + + width = zFar * SQRT3INV; + + if ( s < -1 ) + s = -1; + else if ( s > 1 ) + s = 1; + if ( t < -1 ) + t = -1; + else if ( t > 1 ) + t = 1; + + b[0] = s*width; + b[1] = t*width; + b[2] = width; + + for (j=0 ; j<3 ; j++) + { + k = st_to_vec[axis][j]; + if (k < 0) + v[j] = -b[-k - 1]; + else + v[j] = b[k - 1]; + v[j] += CurrentViewOrigin()[j]; + } + + // avoid bilerp seam + s = (s+1)*0.5; + t = (t+1)*0.5; + + if (s < 1.0/512) + s = 1.0/512; + else if (s > 511.0/512) + s = 511.0/512; + if (t < 1.0/512) + t = 1.0/512; + else if (t > 511.0/512) + t = 511.0/512; + + t = 1.0 - t; + VectorCopy( v, position ); + texCoord[0] = s; + texCoord[1] = t; +} +#pragma warning (default : 4701) + +//----------------------------------------------------------------------------- +// Purpose: +//----------------------------------------------------------------------------- +void R_DrawSkyBox( float zFar, int nDrawFlags /*= 0x3F*/ ) +{ + VPROF("R_DrawSkyBox"); + tmZoneFiltered( TELEMETRY_LEVEL0, 50, TMZF_NONE, "%s %x", __FUNCTION__, nDrawFlags ); + + int i; + Vector normal; + + if ( !r_drawskybox.GetInt() || !mat_loadtextures.GetInt() ) + { + return; + } + + CMatRenderContextPtr pRenderContext( materials ); + + for (i=0 ; i<6 ; i++, nDrawFlags >>= 1 ) + { + // Don't draw this panel of the skybox if the flag isn't set: + if ( !(nDrawFlags & 1) ) + continue; + + VectorCopy( vec3_origin, normal ); + switch( gFakePlaneType[i] ) + { + case 1: + normal[0] = 1; + break; + + case -1: + normal[0] = -1; + break; + + case 2: + normal[1] = 1; + break; + + case -2: + normal[1] = -1; + break; + + case 3: + normal[2] = 1; + break; + + case -3: + normal[2] = -1; + break; + } + + // Normals are reversed so looking at face dots to 1.0, looking away from is -1.0 + // Reject backfacing surfaces on the inside of the cube to avoid binding their texture + // Assuming a 90 fov looking at face is 0 degrees, so reject at 107 + if ( DotProduct( CurrentViewForward(), normal ) < -0.29289f ) + continue; + + Vector positionArray[4]; + Vector2D texCoordArray[4]; + if (skyboxMaterials[skytexorder[i]]) + { + pRenderContext->Bind( skyboxMaterials[skytexorder[i]] ); + + MakeSkyVec( -1.0f, -1.0f, i, zFar, positionArray[0], texCoordArray[0] ); + MakeSkyVec( -1.0f, 1.0f, i, zFar, positionArray[1], texCoordArray[1] ); + MakeSkyVec( 1.0f, 1.0f, i, zFar, positionArray[2], texCoordArray[2] ); + MakeSkyVec( 1.0f, -1.0f, i, zFar, positionArray[3], texCoordArray[3] ); + + IMesh* pMesh = pRenderContext->GetDynamicMesh(); + + CMeshBuilder meshBuilder; + meshBuilder.Begin( pMesh, MATERIAL_TRIANGLES, 4, 6 ); + + // meshbuilder Begin can fail if dynamic mesh is not available (eg, alt-tabbed away) + if ( meshBuilder.BaseVertexData() == NULL ) + continue; + + for (int j = 0; j < 4; ++j) + { + meshBuilder.Position3fv( positionArray[j].Base() ); + meshBuilder.TexCoord2fv( 0, texCoordArray[j].Base() ); + meshBuilder.AdvanceVertex(); + } + CIndexBuilder &indexBuilder = meshBuilder; + indexBuilder.FastQuad( 0 ); + + meshBuilder.End(); + pMesh->Draw(); + } + } +} |