//----------------------------------------------------------------------------
void ScreenPolygons::CreateScene ()
{
// The screen camera is designed to map (x,y,z) in [0,1]^3 to (x',y,'z')
// in [-1,1]^2 x [0,1].
mScreenCamera = new0 Camera(false);
mScreenCamera->SetFrustum(0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f);
mScreenCamera->SetFrame(APoint::ORIGIN, AVector::UNIT_Z, AVector::UNIT_Y,
AVector::UNIT_X);
// Load the biped just for some model to display.
#ifdef WM5_LITTLE_ENDIAN
std::string path = Environment::GetPathR("SkinnedBipedPN.wmof");
#else
std::string path = Environment::GetPathR("SkinnedBipedPN.be.wmof");
#endif
InStream source;
source.Load(path);
mScene = DynamicCast<Node>(source.GetObjectAt(0));
assertion(mScene != 0, "Error in biped stream.\n");
// The background is a textured screen polygon (z = 1).
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0);
int vstride = vformat->GetStride();
VertexBuffer* vbuffer = new0 VertexBuffer(4, vstride);
VertexBufferAccessor vba(vformat, vbuffer);
vba.Position<Float3>(0) = Float3(0.0f, 0.0f, 1.0f);
vba.Position<Float3>(1) = Float3(1.0f, 0.0f, 1.0f);
vba.Position<Float3>(2) = Float3(1.0f, 1.0f, 1.0f);
vba.Position<Float3>(3) = Float3(0.0f, 1.0f, 1.0f);
vba.TCoord<Float2>(0, 0) = Float2(0.0f, 0.0f);
vba.TCoord<Float2>(0, 1) = Float2(1.0f, 0.0f);
vba.TCoord<Float2>(0, 2) = Float2(1.0f, 1.0f);
vba.TCoord<Float2>(0, 3) = Float2(0.0f, 1.0f);
IndexBuffer* ibuffer = new0 IndexBuffer(6, sizeof(int));
int* indices = (int*)ibuffer->GetData();
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 0;
indices[4] = 2;
indices[5] = 3;
mBackPoly = new0 TriMesh(vformat, vbuffer, ibuffer);
path = Environment::GetPathR("RedSky.wmtf");
Texture2DEffect* effect = new0 Texture2DEffect(Shader::SF_LINEAR);
Texture2D* texture = Texture2D::LoadWMTF(path);
mBackPoly->SetEffectInstance(effect->CreateInstance(texture));
// The middle polygon, which may be translated via '+' or '-'.
vbuffer = new0 VertexBuffer(4, vstride);
vba.ApplyTo(vformat, vbuffer);
vba.Position<Float3>(0) = Float3(0.0f, 0.3f, 0.0f);
vba.Position<Float3>(1) = Float3(1.0f, 0.3f, 0.0f);
vba.Position<Float3>(2) = Float3(1.0f, 0.7f, 0.0f);
vba.Position<Float3>(3) = Float3(0.0f, 0.7f, 0.0f);
vba.TCoord<Float2>(0, 0) = Float2(0.0f, 0.3f);
vba.TCoord<Float2>(0, 1) = Float2(1.0f, 0.3f);
vba.TCoord<Float2>(0, 2) = Float2(1.0f, 0.7f);
vba.TCoord<Float2>(0, 3) = Float2(0.0f, 0.7f);
mMidPoly = new0 TriMesh(vformat, vbuffer, ibuffer);
path = Environment::GetPathR("BallTexture.wmtf");
texture = Texture2D::LoadWMTF(path);
mMidPoly->SetEffectInstance(effect->CreateInstance(texture));
mLinearZ = 1.0f;
mDepthZ = 1.0f;
mMidPoly->LocalTransform.SetTranslate(APoint(0.0f, 0.0f, mLinearZ));
// A portion of the foreground is a textured screen polygon (z = 0).
vbuffer = new0 VertexBuffer(5, vstride);
vba.ApplyTo(vformat, vbuffer);
vba.Position<Float3>(0) = Float3(0.0f, 0.0f, 0.0f);
vba.Position<Float3>(1) = Float3(0.5f, 0.0f, 0.0f);
vba.Position<Float3>(2) = Float3(0.75f, 0.5f, 0.0f);
vba.Position<Float3>(3) = Float3(0.5f, 0.75f, 0.0f);
vba.Position<Float3>(4) = Float3(0.0f, 0.5f, 0.0f);
vba.TCoord<Float2>(0, 0) = Float2(0.0f, 0.0f);
vba.TCoord<Float2>(0, 1) = Float2(0.67f, 0.0f);
vba.TCoord<Float2>(0, 2) = Float2(1.0f, 0.67f);
vba.TCoord<Float2>(0, 3) = Float2(0.67f, 1.0f);
vba.TCoord<Float2>(0, 4) = Float2(0.0f, 0.67f);
ibuffer = new0 IndexBuffer(9, sizeof(int));
indices = (int*)ibuffer->GetData();
indices[0] = 0;
indices[1] = 1;
indices[2] = 2;
indices[3] = 0;
indices[4] = 2;
indices[5] = 3;
indices[6] = 0;
indices[7] = 3;
indices[8] = 4;
mForePoly = new0 TriMesh(vformat, vbuffer, ibuffer);
path = Environment::GetPathR("Flower.wmtf");
Texture2DEffect* foreEffect = new0 Texture2DEffect(Shader::SF_LINEAR);
texture = Texture2D::LoadWMTF(path);
mForePoly->SetEffectInstance(foreEffect->CreateInstance(texture));
// Make the foreground semitransparent.
foreEffect->GetAlphaState(0, 0)->BlendEnabled = true;
}
//----------------------------------------------------------------------------
void ParticleSystems::CreateScene ()
{
mScene = new0 Node();
mWireState = new0 WireState();
mRenderer->SetOverrideWireState(mWireState);
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0);
int vstride = vformat->GetStride();
const int numParticles = 32;
VertexBuffer* vbuffer = new0 VertexBuffer(4*numParticles, vstride);
Float4* positionSizes = new1<Float4>(numParticles);
for (int i = 0; i < numParticles; ++i)
{
positionSizes[i][0] = Mathf::SymmetricRandom();
positionSizes[i][1] = Mathf::SymmetricRandom();
positionSizes[i][2] = Mathf::SymmetricRandom();
positionSizes[i][3] = 0.25f*Mathf::UnitRandom();
}
Particles* particles = new0 Particles(vformat, vbuffer, sizeof(int),
positionSizes, 1.0f);
particles->AttachController(new0 BloodCellController());
mScene->AttachChild(particles);
// Create an image with transparency.
const int xsize = 32, ysize = 32;
Texture2D* texture = new0 Texture2D(Texture::TF_A8R8G8B8, xsize,
ysize, 1);
unsigned char* data = (unsigned char*)texture->GetData(0);
float factor = 1.0f/(xsize*xsize + ysize*ysize);
for (int y = 0, i = 0; y < ysize; ++y)
{
for (int x = 0; x < xsize; ++x)
{
// The image is red.
data[i++] = 0;
data[i++] = 0;
data[i++] = 255;
// Semitransparent within a disk, dropping off to zero outside the
// disk.
int dx = 2*x - xsize;
int dy = 2*y - ysize;
float value = factor*(dx*dx + dy*dy);
if (value < 0.125f)
{
value = Mathf::Cos(4.0f*Mathf::PI*value);
}
else
{
value = 0.0f;
}
data[i++] = (unsigned char)(255.0f*value);
}
}
Texture2DEffect* effect = new0 Texture2DEffect(Shader::SF_LINEAR);
effect->GetAlphaState(0, 0)->BlendEnabled = true;
effect->GetDepthState(0, 0)->Enabled = false;
particles->SetEffectInstance(effect->CreateInstance(texture));
}
