//----------------------------------------------------------------------------
void ExtremalQuery::CreateScene ()
{
mScene = new0 Node();
mWireState = new0 WireState();
mRenderer->SetOverrideWireState(mWireState);
mCullState = new0 CullState();
mCullState->Enabled = false;
mRenderer->SetOverrideCullState(mCullState);
const int numVertices = 32;
CreateConvexPolyhedron(numVertices);
mScene->AttachChild(CreateVisualConvexPolyhedron());
// Use small spheres to show the extreme points in the camera's right
// direction.
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
StandardMesh sm(vformat);
VertexColor3Effect* effect = new0 VertexColor3Effect();
// maximum sphere
mMaxSphere = sm.Sphere(8, 8, 0.05f);
mMaxSphere->SetEffectInstance(effect->CreateInstance());
mScene->AttachChild(mMaxSphere);
// minimum sphere
mMinSphere = sm.Sphere(8, 8, 0.05f);
mMinSphere->SetEffectInstance(effect->CreateInstance());
mScene->AttachChild(mMinSphere);
UpdateExtremePoints();
}
//----------------------------------------------------------------------------
void CollisionsMovingSpheres::CreateScene ()
{
mScene = new0 Node();
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
StandardMesh sm(vformat);
mSphere0.Radius = 0.1f;
mSphere1.Radius = 0.2f;
mVelocity0 = Vector3f(0.0f, -1.0f, 0.0f);
mVelocity1 = Vector3f(0.0f, 0.0f, 1.0f);
mMesh0 = sm.Sphere(16, 16, mSphere0.Radius);
mMesh1 = sm.Sphere(16, 16, mSphere1.Radius);
VertexBufferAccessor vba0(mMesh0), vba1(mMesh1);
for (int i = 0; i < vba0.GetNumVertices(); ++i)
{
vba0.Color<Float3>(0, i) = Float3(Mathf::UnitRandom(), 0.0f, 0.0f);
vba1.Color<Float3>(0, i) = Float3(0.0f, 0.0f, Mathf::UnitRandom());
}
VertexColor3Effect* effect = new0 VertexColor3Effect();
mMesh0->SetEffectInstance(effect->CreateInstance());
mMesh1->SetEffectInstance(effect->CreateInstance());
mSphere0.Center = Vector3f(0.0f, 0.75f, 0.0f);
mSphere1.Center = Vector3f(0.0f, -0.75f, 0.0f);
mMesh0->LocalTransform.SetTranslate(mSphere0.Center);
mMesh1->LocalTransform.SetTranslate(mSphere1.Center);
mScene->AttachChild(mMesh0);
mScene->AttachChild(mMesh1);
}
//----------------------------------------------------------------------------
Node* RoughPlaneSolidBox::CreateBox ()
{
mBox = new0 Node();
float xExtent = (float)mModule.XLocExt;
float yExtent = (float)mModule.YLocExt;
float zExtent = (float)mModule.ZLocExt;
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
StandardMesh sm(vformat);
VertexColor3Effect* effect = new0 VertexColor3Effect();
VertexBufferAccessor vba;
Transform transform;
TriMesh* face;
int i;
// +z face
Float3 red(1.0f, 0.0f, 0.0f);
transform.SetTranslate(APoint(0.0f, 0.0f, zExtent));
sm.SetTransform(transform);
face = sm.Rectangle(2, 2, xExtent, yExtent);
vba.ApplyTo(face);
for (i = 0; i < 4; ++i)
{
vba.Color<Float3>(0, 0) = red;
vba.Color<Float3>(0, 1) = red;
vba.Color<Float3>(0, 2) = red;
vba.Color<Float3>(0, 3) = red;
}
face->SetEffectInstance(effect->CreateInstance());
mBox->AttachChild(face);
// -z face
Float3 darkRed(0.5f, 0.0f, 0.0f);
transform.SetTranslate(APoint(0.0f, 0.0f, -zExtent));
transform.SetRotate(HMatrix(AVector::UNIT_Y, AVector::UNIT_X,
-AVector::UNIT_Z, APoint::ORIGIN, true));
sm.SetTransform(transform);
face = sm.Rectangle(2, 2, yExtent, xExtent);
vba.ApplyTo(face);
for (i = 0; i < 4; ++i)
{
vba.Color<Float3>(0, 0) = darkRed;
vba.Color<Float3>(0, 1) = darkRed;
vba.Color<Float3>(0, 2) = darkRed;
vba.Color<Float3>(0, 3) = darkRed;
}
face->SetEffectInstance(effect->CreateInstance());
mBox->AttachChild(face);
// +y face
Float3 green(0.0f, 1.0f, 0.0f);
transform.SetTranslate(APoint(0.0f, yExtent, 0.0f));
transform.SetRotate(HMatrix(AVector::UNIT_Z, AVector::UNIT_X,
AVector::UNIT_Y, APoint::ORIGIN, true));
sm.SetTransform(transform);
face = sm.Rectangle(2, 2, zExtent, xExtent);
vba.ApplyTo(face);
for (i = 0; i < 4; ++i)
{
vba.Color<Float3>(0, 0) = green;
vba.Color<Float3>(0, 1) = green;
vba.Color<Float3>(0, 2) = green;
vba.Color<Float3>(0, 3) = green;
}
face->SetEffectInstance(effect->CreateInstance());
mBox->AttachChild(face);
// -y face
Float3 darkGreen(0.0f, 1.0f, 0.0f);
transform.SetTranslate(APoint(0.0f, -yExtent, 0.0f));
transform.SetRotate(HMatrix(AVector::UNIT_X, AVector::UNIT_Z,
-AVector::UNIT_Y, APoint::ORIGIN, true));
sm.SetTransform(transform);
face = sm.Rectangle(2, 2, xExtent, zExtent);
vba.ApplyTo(face);
for (i = 0; i < 4; ++i)
{
vba.Color<Float3>(0, 0) = darkGreen;
vba.Color<Float3>(0, 1) = darkGreen;
vba.Color<Float3>(0, 2) = darkGreen;
vba.Color<Float3>(0, 3) = darkGreen;
}
face->SetEffectInstance(effect->CreateInstance());
mBox->AttachChild(face);
// +x face
Float3 blue(0.0f, 0.0f, 1.0f);
transform.SetTranslate(APoint(xExtent, 0.0f, 0.0f));
transform.SetRotate(HMatrix(AVector::UNIT_Y, AVector::UNIT_Z,
AVector::UNIT_X, APoint::ORIGIN, true));
sm.SetTransform(transform);
face = sm.Rectangle(2, 2, yExtent, zExtent);
vba.ApplyTo(face);
for (i = 0; i < 4; ++i)
{
vba.Color<Float3>(0, 0) = blue;
vba.Color<Float3>(0, 1) = blue;
vba.Color<Float3>(0, 2) = blue;
vba.Color<Float3>(0, 3) = blue;
}
face->SetEffectInstance(effect->CreateInstance());
mBox->AttachChild(face);
// -x face
Float3 darkBlue(0.0f, 0.0f, 1.0f);
transform.SetTranslate(APoint(-xExtent, 0.0f, 0.0f));
transform.SetRotate(HMatrix(AVector::UNIT_Z, AVector::UNIT_Y,
-AVector::UNIT_X, APoint::ORIGIN, true));
sm.SetTransform(transform);
face = sm.Rectangle(2, 2, zExtent, yExtent);
vba.ApplyTo(face);
for (i = 0; i < 4; ++i)
{
vba.Color<Float3>(0, 0) = darkBlue;
vba.Color<Float3>(0, 1) = darkBlue;
vba.Color<Float3>(0, 2) = darkBlue;
vba.Color<Float3>(0, 3) = darkBlue;
}
face->SetEffectInstance(effect->CreateInstance());
mBox->AttachChild(face);
MoveBox();
return mBox;
}
//----------------------------------------------------------------------------
void PolygonOffsets::CreateScene ()
{
mScene = new0 Node();
mWireState = new0 WireState();
mRenderer->SetOverrideWireState(mWireState);
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
int vstride = vformat->GetStride();
// Vertices to be shared by rectangles 1 and 3.
VertexBuffer* vbuffer0 = new0 VertexBuffer(4, vstride);
VertexBufferAccessor vba(vformat, vbuffer0);
vba.Position<Float3>(0) = Float3(-1.0f, 0.0f, -1.0f);
vba.Position<Float3>(1) = Float3(-1.0f, 0.0f, +1.0f);
vba.Position<Float3>(2) = Float3(+1.0f, 0.0f, +1.0f);
vba.Position<Float3>(3) = Float3(+1.0f, 0.0f, -1.0f);
vba.Color<Float3>(0, 0) = Float3(1.0f, 0.0f, 0.0f);
vba.Color<Float3>(0, 1) = Float3(1.0f, 0.0f, 0.0f);
vba.Color<Float3>(0, 2) = Float3(1.0f, 0.0f, 0.0f);
vba.Color<Float3>(0, 3) = Float3(1.0f, 0.0f, 0.0f);
// Vertices to be shared by rectangles 2 and 4.
VertexBuffer* vbuffer1 = new0 VertexBuffer(4, vstride);
vba.ApplyTo(vformat, vbuffer1);
vba.Position<Float3>(0) = Float3(-1.0f, 0.0f, -1.0f);
vba.Position<Float3>(1) = Float3(-1.0f, 0.0f, +1.0f);
vba.Position<Float3>(2) = Float3(+1.0f, 0.0f, +1.0f);
vba.Position<Float3>(3) = Float3(+1.0f, 0.0f, -1.0f);
vba.Color<Float3>(0, 0) = Float3(0.0f, 1.0f, 0.0f);
vba.Color<Float3>(0, 1) = Float3(0.0f, 1.0f, 0.0f);
vba.Color<Float3>(0, 2) = Float3(0.0f, 1.0f, 0.0f);
vba.Color<Float3>(0, 3) = Float3(0.0f, 1.0f, 0.0f);
// Indices to be shared by all rectangles.
IndexBuffer* ibuffer = new0 IndexBuffer(6, sizeof(int));
int* indices = (int*)ibuffer->GetData();
indices[0] = 0; indices[1] = 1; indices[2] = 3;
indices[3] = 3; indices[4] = 1; indices[5] = 2;
// Effect to be shared by the first three rectangles.
VertexColor3Effect* effect = new0 VertexColor3Effect();
// rectangle 1
TriMesh* mesh = new0 TriMesh(vformat, vbuffer0, ibuffer);
mesh->SetEffectInstance(effect->CreateInstance());
mesh->LocalTransform.SetTranslate(APoint(+2.0f, -4.0f, 0.0f));
mScene->AttachChild(mesh);
// rectangle 2
mesh = new0 TriMesh(vformat, vbuffer1, ibuffer);
mesh->SetEffectInstance(effect->CreateInstance());
mesh->LocalTransform.SetTranslate(APoint(+2.0f, -4.0f, 0.0f));
mesh->LocalTransform.SetUniformScale(0.5f);
mScene->AttachChild(mesh);
// rectangle 3
mesh = new0 TriMesh(vformat, vbuffer0, ibuffer);
mesh->SetEffectInstance(effect->CreateInstance());
mesh->LocalTransform.SetTranslate(APoint(-2.0f, -4.0f, 0.0f));
mScene->AttachChild(mesh);
// rectangle 4
mesh = new0 TriMesh(vformat, vbuffer1, ibuffer);
mesh->LocalTransform.SetTranslate(APoint(-2.0f, -4.0f, 0.0f));
mesh->LocalTransform.SetUniformScale(0.5f);
mScene->AttachChild(mesh);
// Set up the polygon offset for rectangle 4.
effect = new0 VertexColor3Effect();
OffsetState* ostate = effect->GetOffsetState(0, 0);
ostate->FillEnabled = true;
ostate->Scale = -1.0f;
ostate->Bias = -2.0f;
mesh->SetEffectInstance(effect->CreateInstance());
}
//----------------------------------------------------------------------------
void BspNodes::CreateScene ()
{
// Create the scene graph.
//
// 1. The rectangles represent the BSP planes of the BSP tree. They
// share a VertexColor3Effect. You can see a plane from either side
// (backface culling disabled). The planes do not interfere with view
// of the solid objects (wirestate enabled).
//
// 2. The sphere, tetrahedron, and cube share a TextureEffect. These
// objects are convex. The backfacing triangles are discarded
// (backface culling enabled). The front facing triangles are drawn
// correctly by convexity, so depthbuffer reads are disabled and
// depthbuffer writes are enabled. The BSP-based sorting of objects
// guarantees that front faces of convex objects in the foreground
// are drawn after the front faces of convex objects in the background,
// which allows us to set the depthbuffer state as we have. That is,
// BSPNode sorts from back to front.
//
// 3. The torus has backface culling enabled and depth buffering enabled.
// This is necessary, because the torus is not convex.
//
// 4. Generally, if all objects are opaque, then you want to draw from
// front to back with depth buffering fully enabled. You need to
// reverse-order the elements of the visible set before drawing. If
// any of the objects are semitransparent, then drawing back to front
// is the correct order to handle transparency. However, you do not
// get the benefit of early z-rejection for opaque objects. A better
// BSP sorter needs to be built to produce a visible set with opaque
// objects listed first (front-to-back order) and semitransparent
// objects listed last (back-to-front order).
//
// scene
// ground
// bsp0
// bsp1
// bsp3
// torus
// rectangle3
// sphere
// rectangle1
// tetrahedron
// rectangle0
// bsp2
// cube
// rectangle2
// octahedron
mScene = new0 Node();
// 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.
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_TEXCOORD, VertexFormat::AT_FLOAT2, 0);
StandardMesh sm(vformat);
VertexBufferAccessor vba;
TriMesh* ground = sm.Rectangle(2, 2, 16.0f, 16.0f);
vba.ApplyTo(ground);
for (int i = 0; i < vba.GetNumVertices(); ++i)
{
Float2& tcoord = vba.TCoord<Float2>(0, i);
tcoord[0] *= 128.0f;
tcoord[1] *= 128.0f;
}
std::string path = Environment::GetPathR("Horizontal.wmtf");
Texture2D* texture = Texture2D::LoadWMTF(path);
ground->SetEffectInstance(Texture2DEffect::CreateUniqueInstance(texture,
Shader::SF_LINEAR_LINEAR, Shader::SC_REPEAT, Shader::SC_REPEAT));
mScene->AttachChild(ground);
// Partition the region above the ground into 5 convex pieces. Each plane
// is perpendicular to the ground (not required generally).
VertexColor3Effect* vceffect = new0 VertexColor3Effect();
vceffect->GetCullState(0, 0)->Enabled = false;
vceffect->GetWireState(0, 0)->Enabled = true;
Vector2f v0(-1.0f, 1.0f);
Vector2f v1(1.0f, -1.0f);
Vector2f v2(-0.25f, 0.25f);
Vector2f v3(-1.0f, -1.0f);
Vector2f v4(0.0f, 0.0f);
Vector2f v5(1.0f, 0.5f);
Vector2f v6(-0.75f, -7.0f/12.0f);
Vector2f v7(-0.75f, 0.75f);
Vector2f v8(1.0f, 1.0f);
BspNode* bsp0 = CreateNode(v0, v1, vceffect, Float3(1.0f, 0.0f, 0.0f));
BspNode* bsp1 = CreateNode(v2, v3, vceffect, Float3(0.0f, 0.5f, 0.0f));
BspNode* bsp2 = CreateNode(v4, v5, vceffect, Float3(0.0f, 0.0f, 1.0f));
BspNode* bsp3 = CreateNode(v6, v7, vceffect, Float3(0.0f, 0.0f, 0.0f));
bsp0->AttachPositiveChild(bsp1);
bsp0->AttachNegativeChild(bsp2);
bsp1->AttachPositiveChild(bsp3);
// Attach an object in each convex region.
float height = 0.1f;
Vector2f center;
TriMesh* mesh;
// The texture effect for the convex objects.
Texture2DEffect* cvxeffect =
new0 Texture2DEffect(Shader::SF_LINEAR_LINEAR);
cvxeffect->GetDepthState(0, 0)->Enabled = false;
cvxeffect->GetDepthState(0, 0)->Writable = true;
// The texture effect for the torus.
Texture2DEffect* toreffect =
new0 Texture2DEffect(Shader::SF_LINEAR_LINEAR);
// The texture image shared by the objects.
path = Environment::GetPathR("Flower.wmtf");
texture = Texture2D::LoadWMTF(path);
// Region 0: Create a torus mesh.
mesh = sm.Torus(16, 16, 1.0f, 0.25f);
mesh->SetEffectInstance(toreffect->CreateInstance(texture));
mesh->LocalTransform.SetUniformScale(0.1f);
center = (v2 + v6 + v7)/3.0f;
mesh->LocalTransform.SetTranslate(APoint(center[0], center[1], height));
bsp3->AttachPositiveChild(mesh);
// Region 1: Create a sphere mesh.
mesh = sm.Sphere(32, 16, 1.0f);
mesh->SetEffectInstance(cvxeffect->CreateInstance(texture));
mesh->LocalTransform.SetUniformScale(0.1f);
center = (v0 + v3 + v6 + v7)/4.0f;
mesh->LocalTransform.SetTranslate(APoint(center[0], center[1], height));
bsp3->AttachNegativeChild(mesh);
// Region 2: Create a tetrahedron.
mesh = sm.Tetrahedron();
mesh->SetEffectInstance(cvxeffect->CreateInstance(texture));
mesh->LocalTransform.SetUniformScale(0.1f);
center = (v1 + v2 + v3)/3.0f;
mesh->LocalTransform.SetTranslate(APoint(center[0], center[1], height));
bsp1->AttachNegativeChild(mesh);
// Region 3: Create a hexahedron (cube).
mesh = sm.Hexahedron();
mesh->SetEffectInstance(cvxeffect->CreateInstance(texture));
mesh->LocalTransform.SetUniformScale(0.1f);
center = (v1 + v4 + v5)/3.0f;
mesh->LocalTransform.SetTranslate(APoint(center[0], center[1], height));
bsp2->AttachPositiveChild(mesh);
// Region 4: Create an octahedron.
mesh = sm.Octahedron();
mesh->SetEffectInstance(cvxeffect->CreateInstance(texture));
mesh->LocalTransform.SetUniformScale(0.1f);
center = (v0 + v4 + v5 + v8)/4.0f;
mesh->LocalTransform.SetTranslate(APoint(center[0], center[1], height));
bsp2->AttachNegativeChild(mesh);
mScene->AttachChild(bsp0);
}
//----------------------------------------------------------------------------
void FreeFormDeformation::CreatePolylines ()
{
// Generate the polylines that connect adjacent control points.
mPolysegmentRoot = new0 Node();
mTrnNode->AttachChild(mPolysegmentRoot);
VertexColor3Effect* effect = new0 VertexColor3Effect();
VertexFormat* vformat = VertexFormat::Create(2,
VertexFormat::AU_POSITION, VertexFormat::AT_FLOAT3, 0,
VertexFormat::AU_COLOR, VertexFormat::AT_FLOAT3, 0);
int vstride = vformat->GetStride();
VertexBufferAccessor vba;
VertexBuffer* vbuffer;
Polysegment* segment;
int i0, i1, i2;
for (i0 = 0; i0 < mQuantity; ++i0)
{
for (i1 = 0; i1 < mQuantity; ++i1)
{
for (i2 = 0; i2 < mQuantity-1; ++i2)
{
vbuffer = new0 VertexBuffer(2, vstride);
vba.ApplyTo(vformat, vbuffer);
vba.Position<Vector3f>(0) =
mVolume->GetControlPoint(i0, i1, i2);
vba.Position<Vector3f>(1) =
mVolume->GetControlPoint(i0, i1, i2+1);
vba.Color<Float3>(0, 0) = Float3(0.0f, 0.0f, 0.75f);
vba.Color<Float3>(0, 1) = Float3(0.0f, 0.0f, 0.75f);
segment = new0 Polysegment(vformat, vbuffer, true);
segment->SetEffectInstance(effect->CreateInstance());
mPolysegmentRoot->AttachChild(segment);
}
}
for (i2 = 0; i2 < mQuantity; ++i2)
{
for (i1 = 0; i1 < mQuantity-1; ++i1)
{
vbuffer = new0 VertexBuffer(2, vstride);
vba.ApplyTo(vformat, vbuffer);
vba.Position<Vector3f>(0) =
mVolume->GetControlPoint(i0, i1, i2);
vba.Position<Vector3f>(1) =
mVolume->GetControlPoint(i0, i1+1, i2);
vba.Color<Float3>(0, 0) = Float3(0.0f, 0.75f, 0.0f);
vba.Color<Float3>(0, 1) = Float3(0.0f, 0.75f, 0.0f);
segment = new0 Polysegment(vformat, vbuffer, true);
segment->SetEffectInstance(effect->CreateInstance());
mPolysegmentRoot->AttachChild(segment);
}
}
}
for (i0 = 0; i0 < mQuantity-1; ++i0)
{
for (i1 = 0; i1 < mQuantity; ++i1)
{
for (i2 = 0; i2 < mQuantity; ++i2)
{
vbuffer = new0 VertexBuffer(2, vstride);
vba.ApplyTo(vformat, vbuffer);
vba.Position<Vector3f>(0) =
mVolume->GetControlPoint(i0, i1, i2);
vba.Position<Vector3f>(1) =
mVolume->GetControlPoint(i0+1, i1, i2);
vba.Color<Float3>(0,0) = Float3(0.75f, 0.0f, 0.0f);
vba.Color<Float3>(0,1) = Float3(0.75f, 0.0f, 0.0f);
segment = new0 Polysegment(vformat, vbuffer, true);
segment->SetEffectInstance(effect->CreateInstance());
mPolysegmentRoot->AttachChild(segment);
}
}
}
}