//----------------------------------------------------------------------------
void Fluids3D::CreateScene ()
{
// Get fluid solver parameters.
const int bound0M1 = mSmoke->GetIMax();
const int bound1M1 = mSmoke->GetJMax();
const int bound2M1 = mSmoke->GetKMax();
const int bound0 = bound0M1 + 1;
const int bound1 = bound1M1 + 1;
const int bound2 = bound2M1 + 1;
const int quantity = bound0*bound1*bound2;
const float* x = mSmoke->GetX();
const float* y = mSmoke->GetY();
const float* z = mSmoke->GetZ();
#ifdef USE_PARTICLES
// Create the vertex format.
VertexFormat* vformat = VertexFormat::Create(3,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT4, 0);
#else
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT4, 0);
#endif
// Create the vertex buffer for the cube.
#ifdef USE_PARTICLES
const int numVertices = 4*quantity;
#else
const int numVertices = quantity;
#endif
int vstride = vformat->GetStride();
VertexBuffer* vbuffer = new0 VertexBuffer(numVertices, vstride);
int i0, i1, i2, index;
#ifdef USE_PARTICLES
const float delta = mSmoke->GetDx();
Float4* posSize = new1<Float4>(quantity);
for (i2 = 0, index = 0; i2 < bound2; ++i2)
{
for (i1 = 0; i1 < bound1; ++i1)
{
for (i0 = 0; i0 < bound0; ++i0, ++index)
{
posSize[index] = Float4(x[i0], y[i1], z[i2], delta);
}
}
}
mCube = new0 Particles(vformat, vbuffer, 4, posSize, 1.0f);
UpdateVertexBuffer();
IndexBuffer* ibuffer = mCube->GetIndexBuffer();
#else
VertexBufferAccessor vba(vformat, vbuffer);
for (i2 = 0, index = 0; i2 < bound2; ++i2)
{
for (i1 = 0; i1 < bound1; ++i1)
{
for (i0 = 0; i0 < bound0; ++i0, ++index)
{
vba.Position<Float3>(index) = Float3(x[i0], y[i1], z[i2]);
}
}
}
// Create the index buffer for the cube.
const int numIndices =
6*bound0M1*bound1M1*bound2 +
6*bound0M1*bound1*bound2M1 +
6*bound0*bound1M1*bound2M1;
IndexBuffer* ibuffer = new0 IndexBuffer(numIndices, sizeof(int));
int* indices = (int*)ibuffer->GetData();
const int bound01 = bound0*bound1;
int j0, j1, j2, j3;
for (i2 = 0; i2 < bound2; ++i2)
{
for (i1 = 0; i1 < bound1M1; ++i1)
{
for (i0 = 0; i0 < bound0M1; ++i0)
{
j0 = i0 + bound0*(i1 + bound1*i2);
j1 = j0 + 1;
j2 = j1 + bound0;
j3 = j2 - 1;
*indices++ = j0;
*indices++ = j1;
*indices++ = j2;
*indices++ = j0;
*indices++ = j2;
*indices++ = j3;
}
}
}
for (i1 = 0; i1 < bound1; ++i1)
{
for (i2 = 0; i2 < bound2M1; ++i2)
{
for (i0 = 0; i0 < bound0M1; ++i0)
{
j0 = i0 + bound0*(i1 + bound1*i2);
j1 = j0 + 1;
j2 = j1 + bound01;
j3 = j2 - 1;
*indices++ = j0;
*indices++ = j1;
*indices++ = j2;
*indices++ = j0;
*indices++ = j2;
*indices++ = j3;
}
}
}
for (i0 = 0; i0 < bound0; ++i0)
{
for (i1 = 0; i1 < bound1M1; ++i1)
{
for (i2 = 0; i2 < bound2M1; ++i2)
{
j0 = i0 + bound0*(i1 + bound1*i2);
j1 = j0 + bound0;
j2 = j1 + bound01;
j3 = j2 - bound0;
*indices++ = j0;
*indices++ = j1;
*indices++ = j2;
*indices++ = j0;
*indices++ = j2;
*indices++ = j3;
}
}
}
mCube = new0 TriMesh(vformat, vbuffer, ibuffer);
UpdateVertexBuffer();
#endif
mNumIndices = ibuffer->GetNumElements();
mIndices = new1<int>(mNumIndices);
memcpy(mIndices, ibuffer->GetData(), mNumIndices*sizeof(int));
// Create the cube effect.
#ifdef USE_PARTICLES
std::string path = Environment::GetPathR("Disk.wmtf");
Texture2D* texture = Texture2D::LoadWMTF(path);
VisualEffectInstance* instance =
VertexColor4TextureEffect::CreateUniqueInstance(texture,
Shader::SF_NEAREST, Shader::SC_CLAMP_EDGE, Shader::SC_CLAMP_EDGE);
#else
VertexColor4Effect* effect = new0 VertexColor4Effect();
VisualEffectInstance* instance = effect->CreateInstance();
#endif
const VisualPass* pass = instance->GetPass(0);
AlphaState* astate = pass->GetAlphaState();
astate->BlendEnabled = true;
CullState* cstate = pass->GetCullState();
cstate->Enabled = false;
DepthState* dstate = pass->GetDepthState();
dstate->Enabled = false;
dstate->Writable = false;
mCube->SetEffectInstance(instance);
mScene = new0 Node();
mScene->AttachChild(mCube);
}
//----------------------------------------------------------------------------
void BillboardNodes::CreateScene ()
{
mScene = new0 Node();
mCullState = new0 CullState();
mRenderer->SetOverrideCullState(mCullState);
mWireState = new0 WireState();
mRenderer->SetOverrideWireState(mWireState);
// All triangle meshes have this common vertex format. Use StandardMesh
// to create these meshes.
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0);
StandardMesh stdMesh(vformat);
// Create the ground. It covers a square with vertices (1,1,0), (1,-1,0),
// (-1,1,0), and (-1,-1,0). Multiply the texture coordinates by a factor
// to enhance the wrap-around.
mGround = stdMesh.Rectangle(2, 2, 16.0f, 16.0f);
VertexBufferAccessor vba(mGround);
int i;
for (i = 0; i < vba.GetNumVertices(); ++i)
{
Float2& tcoord = vba.TCoord<Float2>(0, i);
tcoord[0] *= 128.0f;
tcoord[1] *= 128.0f;
}
// Create a texture effect for the ground.
std::string path = Environment::GetPathR("Horizontal.wmtf");
Texture2D* texture = Texture2D::LoadWMTF(path);
VisualEffectInstance* instance = Texture2DEffect::CreateUniqueInstance(
texture, Shader::SF_LINEAR_LINEAR, Shader::SC_REPEAT,
Shader::SC_REPEAT);
mGround->SetEffectInstance(instance);
mScene->AttachChild(mGround);
// Create a rectangle mesh. The mesh is in the xy-plane. Do not apply
// local transformations to the mesh. Use the billboard node transforms
// to control the mesh location and orientation.
mRectangle = stdMesh.Rectangle(2, 2, 0.125f, 0.25f);
// Create a texture effect for the rectangle and for the torus.
Texture2DEffect* geomEffect = new0 Texture2DEffect(Shader::SF_LINEAR);
path = Environment::GetPathR("RedSky.wmtf");
texture = Texture2D::LoadWMTF(path);
mRectangle->SetEffectInstance(geomEffect->CreateInstance(texture));
// Create a billboard node that causes a rectangle to always be facing
// the camera. This is the type of billboard for an avatar.
mBillboard0 = new0 BillboardNode(mCamera);
mBillboard0->AttachChild(mRectangle);
mScene->AttachChild(mBillboard0);
// The billboard rotation is about its model-space up-vector (0,1,0). In
// this application, world-space up is (0,0,1). Locally rotate the
// billboard so it's up-vector matches the world's.
mBillboard0->LocalTransform.SetTranslate(APoint(-0.25f, 0.0f, 0.25f));
mBillboard0->LocalTransform.SetRotate(HMatrix(AVector::UNIT_X,
Mathf::HALF_PI));
// Create a torus mesh. Do not apply local transformations to the mesh.
// Use the billboard node transforms to control the mesh location and
// orientation.
mTorus = StandardMesh(vformat, false).Torus(16, 16, 1.0f, 0.25f);
mTorus->LocalTransform.SetUniformScale(0.1f);
// Create a texture effect for the torus. It uses the RedSky image that
// the rectangle uses.
mTorus->SetEffectInstance(geomEffect->CreateInstance(texture));
// Create a billboard node that causes an object to always be oriented
// the same way relative to the camera.
mBillboard1 = new0 BillboardNode(mCamera);
mBillboard1->AttachChild(mTorus);
mScene->AttachChild(mBillboard1);
// The billboard rotation is about its model-space up-vector (0,1,0). In
// this application, world-space up is (0,0,1). Locally rotate the
// billboard so it's up-vector matches the world's.
mBillboard1->LocalTransform.SetTranslate(APoint(0.25f, 0.0f, 0.25f));
mBillboard1->LocalTransform.SetRotate(HMatrix(AVector::UNIT_X,
Mathf::HALF_PI));
#ifdef DEMONSTRATE_VIEWPORT_BOUNDING_RECTANGLE
// 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].
mSSCamera = new0 Camera(false);
mSSCamera->SetFrustum(0.0f, 1.0f, 0.0f, 1.0f, 0.0f, 1.0f);
mSSCamera->SetFrame(APoint::ORIGIN, AVector::UNIT_Z, AVector::UNIT_Y,
AVector::UNIT_X);
// Create a semitransparent screen rectangle.
VertexFormat* ssVFormat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT4, 0);
int ssVStride = ssVFormat->GetStride();
VertexBuffer* ssVBuffer = new0 VertexBuffer(4, ssVStride);
VertexBufferAccessor ssVba(ssVFormat, ssVBuffer);
Float4 ssColor(0.0f, 0.0f, 1.0f, 0.25f);
ssVba.Position<Float3>(0) = Float3(0.0f, 0.0f, 0.0f);
ssVba.Position<Float3>(1) = Float3(1.0f, 0.0f, 0.0f);
ssVba.Position<Float3>(2) = Float3(1.0f, 1.0f, 0.0f);
ssVba.Position<Float3>(3) = Float3(0.0f, 1.0f, 0.0f);
ssVba.Color<Float4>(0, 0) = ssColor;
ssVba.Color<Float4>(0, 1) = ssColor;
ssVba.Color<Float4>(0, 2) = ssColor;
ssVba.Color<Float4>(0, 3) = ssColor;
IndexBuffer* ssIBuffer = new0 IndexBuffer(6, sizeof(int));
int* indices = (int*)ssIBuffer->GetData();
indices[0] = 0; indices[1] = 1; indices[2] = 2;
indices[3] = 0; indices[4] = 2; indices[5] = 3;
mSSRectangle = new0 TriMesh(ssVFormat, ssVBuffer, ssIBuffer);
mSSRectangle->Update();
// Create a vertex color effect for the screen rectangle.
VertexColor4Effect* ssEffect = new0 VertexColor4Effect();
mSSRectangle->SetEffectInstance(ssEffect->CreateInstance());
// Alpha blending must be enabled to obtain the semitransparency.
ssEffect->GetAlphaState(0, 0)->BlendEnabled = true;
#endif
}