//-----------------------------------------------------------------------------
// Paints a regular texture
//-----------------------------------------------------------------------------
void CVMTPreviewPanel::DrawRectangle( void )
{
// Get the aspect ratio of the material
int tw = m_Material->GetMappingWidth();
int th = m_Material->GetMappingHeight();
if ( tw <= 0 || th <= 0 )
return;
int w, h;
GetSize( w, h );
if ( w == 0 || h == 0 )
return;
SetupOrthoMatrix( w, h );
SetupLightingState();
CMatRenderContextPtr pRenderContext( MaterialSystem() );
pRenderContext->MatrixMode( MATERIAL_VIEW );
pRenderContext->LoadIdentity();
pRenderContext->MatrixMode( MATERIAL_MODEL );
pRenderContext->LoadIdentity();
IMesh* pMesh = pRenderContext->GetDynamicMesh();
CMeshBuilder meshBuilder;
meshBuilder.Begin( pMesh, MATERIAL_TRIANGLE_STRIP, 4, 4 );
bool bIsUsingLightmap = m_Material->GetPropertyFlag( MATERIAL_PROPERTY_NEEDS_LIGHTMAP );
bool bIsUsingBumpedLightmap = m_Material->GetPropertyFlag( MATERIAL_PROPERTY_NEEDS_BUMPED_LIGHTMAPS );
int nLightmapWidth = m_pLightmapTexture->GetActualWidth();
float flHalfLuxel = 0.5f / nLightmapWidth;
Vector2D halfTexel( 0.5f / tw, 0.5f / th );
Vector vecNormal( 0.0f, 0.0f, 1.0f );
Vector4D vecTangentS( 1.0f, 0.0f, 0.0f, 1.0f );
Vector vecTangentT;
CrossProduct( vecNormal, vecTangentS.AsVector3D(), vecTangentT );
float screenaspect = (float)tw / (float)th;
float aspect = (float)w / (float)h;
float ratio = screenaspect / aspect;
// Screen is wider, need bars at top and bottom
int x2, y2;
int x, y;
x = y = 0;
int nXBorder = w > 15 ? 5 : w / 3;
int nYBorder = h > 15 ? 5 : h / 3;
w -= 2 * nXBorder;
h -= 2 * nYBorder;
if ( ratio > 1.0f )
{
int usetall = (float)w / screenaspect;
y = ( h - usetall ) / 2;
h = usetall;
}
// Screen is narrower, need bars at left/right
else
{
int usewide = (float)h * screenaspect;
x = ( w - usewide ) / 2;
w = usewide;
}
x += nXBorder;
y += nYBorder;
x2 = x+w; y2 = y+h;
float u = halfTexel.x;
float v = halfTexel.y;
float u1_l, u1_r, v1_t, v1_b;
float u2_l, u2_r, v2_t, v2_b;
u1_l = u2_l = u;
u1_r = u2_r = 1.0f - u;
v1_t = v2_t = v;
v1_b = v2_b = 1.0f - v;
if ( bIsUsingLightmap )
{
u1_l = v1_t = flHalfLuxel;
u1_r = v1_b = 0.25 - flHalfLuxel;
if ( bIsUsingBumpedLightmap )
{
u2_l = u2_r = 0.25f;
v2_t = v2_b = 0.0f;
}
}
meshBuilder.Position3f( x, y2, 0.0f );
meshBuilder.Normal3fv( vecNormal.Base() );
meshBuilder.Color4ub( 255, 0, 0, 255 );
meshBuilder.TexCoord2f( 0, u, v );
meshBuilder.TexCoord2f( 1, u1_l, v1_t );
meshBuilder.TexCoord2f( 2, u2_l, v2_t );
meshBuilder.TangentS3fv( vecTangentS.Base() );
meshBuilder.TangentT3fv( vecTangentT.Base() );
meshBuilder.BoneWeight( 0, 1.0f );
meshBuilder.BoneMatrix( 0, 0 );
meshBuilder.UserData( vecTangentS.Base() );
meshBuilder.AdvanceVertex();
meshBuilder.Position3f( x, y, 0.0f );
meshBuilder.Normal3fv( vecNormal.Base() );
meshBuilder.Color4ub( 255, 255, 255, 64 );
meshBuilder.TexCoord2f( 0, u, 1.0f - v );
meshBuilder.TexCoord2f( 1, u1_l, v1_b );
meshBuilder.TexCoord2f( 2, u2_l, v2_b );
meshBuilder.TangentS3fv( vecTangentS.Base() );
meshBuilder.TangentT3fv( vecTangentT.Base() );
meshBuilder.BoneWeight( 0, 1.0f );
meshBuilder.BoneMatrix( 0, 0 );
meshBuilder.UserData( vecTangentS.Base() );
meshBuilder.AdvanceVertex();
meshBuilder.Position3f( x2, y2, 0.0f );
meshBuilder.Normal3fv( vecNormal.Base() );
meshBuilder.Color4ub( 0, 0, 255, 255 );
meshBuilder.TexCoord2f( 0, 1.0f - u, v );
meshBuilder.TexCoord2f( 1, u1_r, v1_t );
meshBuilder.TexCoord2f( 2, u2_r, v2_t );
meshBuilder.TangentS3fv( vecTangentS.Base() );
meshBuilder.TangentT3fv( vecTangentT.Base() );
meshBuilder.BoneWeight( 0, 1.0f );
meshBuilder.BoneMatrix( 0, 0 );
meshBuilder.UserData( vecTangentS.Base() );
meshBuilder.AdvanceVertex();
meshBuilder.Position3f( x2, y, 0.0f );
meshBuilder.Normal3fv( vecNormal.Base() );
meshBuilder.Color4ub( 0, 255, 0, 64 );
meshBuilder.TexCoord2f( 0, 1.0f - u, 1.0f - v );
meshBuilder.TexCoord2f( 1, u1_r, v1_b );
meshBuilder.TexCoord2f( 2, u2_r, v2_b );
meshBuilder.TangentS3fv( vecTangentS.Base() );
meshBuilder.TangentT3fv( vecTangentT.Base() );
meshBuilder.BoneWeight( 0, 1.0f );
meshBuilder.BoneMatrix( 0, 0 );
meshBuilder.UserData( vecTangentS.Base() );
meshBuilder.AdvanceVertex();
meshBuilder.FastIndex( 0 );
meshBuilder.FastIndex( 1 );
meshBuilder.FastIndex( 2 );
meshBuilder.FastIndex( 3 );
meshBuilder.End();
pMesh->Draw();
}
//-----------------------------------------------------------------------------
// Draw a sphere
//-----------------------------------------------------------------------------
void CVMTPreviewPanel::RenderSphere( const Vector &vCenter, float flRadius, int nTheta, int nPhi )
{
int nVertices = nTheta * nPhi;
int nIndices = 2 * ( nTheta + 1 ) * ( nPhi - 1 );
CMatRenderContextPtr pRenderContext( MaterialSystem() );
IMesh* pMesh = pRenderContext->GetDynamicMesh();
CMeshBuilder meshBuilder;
meshBuilder.Begin( pMesh, MATERIAL_TRIANGLE_STRIP, nVertices, nIndices );
bool bIsUsingLightmap = m_Material->GetPropertyFlag( MATERIAL_PROPERTY_NEEDS_LIGHTMAP );
bool bIsUsingBumpedLightmap = m_Material->GetPropertyFlag( MATERIAL_PROPERTY_NEEDS_BUMPED_LIGHTMAPS );
int nLightmapWidth = m_pLightmapTexture->GetActualWidth();
float flHalfLuxel = 0.5f / nLightmapWidth;
//
// Build the index buffer.
//
int i, j;
for ( i = 0; i < nPhi; ++i )
{
for ( j = 0; j < nTheta; ++j )
{
float u = j / ( float )(nTheta - 1);
float v = i / ( float )(nPhi - 1);
float theta = ( j != nTheta-1 ) ? 2.0f * M_PI * u : 0.0f;
float phi = M_PI * v;
Vector vecPos;
vecPos.x = flRadius * sin(phi) * cos(theta);
vecPos.y = flRadius * sin(phi) * sin(theta);
vecPos.z = flRadius * cos(phi);
Vector vecNormal = vecPos;
VectorNormalize( vecNormal );
Vector4D vecTangentS;
Vector vecTangentT;
vecTangentS.Init( vecPos.z, -vecPos.x, 0.0f, 1.0f );
if ( VectorNormalize( vecTangentS.AsVector3D() ) == 0.0f )
{
vecTangentS.Init( 1.0f, 0.0f, 0.0f, 1.0f );
}
CrossProduct( vecNormal, vecTangentS.AsVector3D(), vecTangentT );
unsigned char red = (int)( u * 255.0f );
unsigned char green = (int)( v * 255.0f );
unsigned char blue = (int)( v * 255.0f );
unsigned char alpha = (int)( v * 255.0f );
vecPos += vCenter;
float u1, u2, v1, v2;
u1 = u2 = u;
v1 = v2 = v;
if ( bIsUsingLightmap )
{
u1 = RemapVal( u1, 0.0f, 1.0f, flHalfLuxel, 0.25 - flHalfLuxel );
if ( bIsUsingBumpedLightmap )
{
u2 = 0.25f;
v2 = 0.0f;
}
}
meshBuilder.Position3fv( vecPos.Base() );
meshBuilder.Normal3fv( vecNormal.Base() );
meshBuilder.Color4ub( red, green, blue, alpha );
meshBuilder.TexCoord2f( 0, 2.0f * u, v );
meshBuilder.TexCoord2f( 1, u1, v1 );
meshBuilder.TexCoord2f( 2, u2, v2 );
meshBuilder.TangentS3fv( vecTangentS.Base() );
meshBuilder.TangentT3fv( vecTangentT.Base() );
meshBuilder.BoneWeight( 0, 1.0f );
meshBuilder.BoneMatrix( 0, 0 );
meshBuilder.UserData( vecTangentS.Base() );
meshBuilder.AdvanceVertex();
}
}
//
// Emit the triangle strips.
//
int idx = 0;
for ( i = 0; i < nPhi - 1; ++i )
{
for ( j = 0; j < nTheta; ++j )
{
idx = nTheta * i + j;
meshBuilder.FastIndex( idx );
meshBuilder.FastIndex( idx + nTheta );
}
//
// Emit a degenerate triangle to skip to the next row without
// a connecting triangle.
//
if ( i < nPhi - 2 )
{
meshBuilder.FastIndex( idx + 1 );
meshBuilder.FastIndex( idx + 1 + nTheta );
}
}
meshBuilder.End();
pMesh->Draw();
}
