本文整理汇总了C++中TriangleBuffer类的典型用法代码示例。如果您正苦于以下问题：C++ TriangleBuffer类的具体用法？C++ TriangleBuffer怎么用？C++ TriangleBuffer使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了TriangleBuffer类的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: render
void CubeMapRenderer::render(const CubeMapTextureObject& cubeMapTexture, const ICamera<float>& camera, const TriangleBuffer& buffer)
{
const auto& positions = buffer.getPositions().get();// buffers[0].get();
const auto& normals = buffer.getNormals().get();//buffers[1].get();
if (positions.empty()) {
return;
}
cubeMapTexture.bind();
glEnable(GL_DEPTH_TEST);
glUseProgram(shader.getId());
//cubeMapTexture.bind();
// glUniform1f(shader.getUniformLocation("reflectFactor"), 0.8f);
// glUniform1f(shader.getUniformLocation("refractFactor"), 1.2f);
assert(GL_NO_ERROR == glGetError());
glUniform1i(shader.getUniformLocation("cubeMapTex"), cubeMapTexture.getId());// volumeTexture.getId());
glUniform3fv(shader.getUniformLocation("eyePosition"), 1, camera.getPosition().toArray().data());
assert(GL_NO_ERROR == glGetError());
glUniformMatrix4fv(shader.getUniformLocation("modelviewMatrix"), 1, false, camera.getModelviewMatrix().toArray().data());
glUniformMatrix4fv(shader.getUniformLocation("projectionMatrix"), 1, false, camera.getProjectionMatrix().toArray().data());
assert(GL_NO_ERROR == glGetError());
glVertexAttribPointer(shader.getAttribLocation("position"), 3, GL_FLOAT, GL_FALSE, 0, positions.data());
glVertexAttribPointer(shader.getAttribLocation("normal"), 3, GL_FLOAT, GL_FALSE, 0, normals.data());
assert(GL_NO_ERROR == glGetError());
assert(GL_NO_ERROR == glGetError());
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
for (const auto& b : buffer.getBlocks()) {
const auto& indices = b.getIndices();
glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(indices.size()), GL_UNSIGNED_INT, indices.data());
}
glDisableVertexAttribArray(0);
glDisableVertexAttribArray(1);
glBindFragDataLocation(shader.getId(), 0, "fragColor");
cubeMapTexture.unbind();
glDisable(GL_DEPTH_TEST);
glUseProgram(0);
}示例2: AddToTriangleBuffer
void TorusGenerator::AddToTriangleBuffer(TriangleBuffer& Buffer) const
{
Buffer.RebaseOffset();
Buffer.EstimateVertexCount( ( this->NumPoloidalSeg + 1 ) * ( this->NumToroidalSeg + 1 ) );
Buffer.EstimateIndexCount( ( this->NumPoloidalSeg ) * ( this->NumToroidalSeg + 1 ) * 6 );
Real deltaSection = ( MathTools::GetTwoPi() / this->NumToroidalSeg );
Real deltaCircle = ( MathTools::GetTwoPi() / this->NumPoloidalSeg );
Integer Offset = 0;
for( Whole i = 0 ; i <= this->NumPoloidalSeg ; i++ )
{
for( Whole j = 0 ; j<= this->NumToroidalSeg ; j++ )
{
Vector3 c0( this->TorusPoloidalRadius, 0.0, 0.0 );
Vector3 v0( this->TorusPoloidalRadius + this->TorusToroidalRadius * cosf( j * deltaSection ), this->TorusToroidalRadius * sinf( j * deltaSection ), 0.0 );
Quaternion q( i * deltaCircle, Vector3::Unit_Y() );
Vector3 v = q * v0;
Vector3 c = q * c0;
this->AddPoint( Buffer, v,
( v - c ).GetNormal(),
Vector2( i / (Real)this->NumPoloidalSeg, j / (Real)this->NumToroidalSeg ) );
if( i != this->NumPoloidalSeg ) {
Buffer.AddIndex( Offset + this->NumToroidalSeg + 1 );
Buffer.AddIndex( Offset );
Buffer.AddIndex( Offset + this->NumToroidalSeg );
Buffer.AddIndex( Offset + this->NumToroidalSeg + 1 );
Buffer.AddIndex( Offset + 1 );
Buffer.AddIndex( Offset );
}
Offset++;
}
}
}示例3: render
void LegacyRenderer::render(const ICamera<float>& camera, const PointLight<float>& light, const TriangleBuffer& buffer)
{
const auto& positions = buffer.getPositions().get();// buffers[0].get();
const auto& normals = buffer.getNormals().get();//buffers[1].get();
if (positions.empty()) {
return;
}
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
glEnable(GL_LIGHT0);
const auto& projectionMatrix = camera.getProjectionMatrix();
const auto& modelviewMatrix = camera.getModelviewMatrix();;
std::vector<float> lightPos = { light.getPos().getX(), light.getPos().getY(), light.getPos().getZ(), 1.0 };
glLightfv(GL_LIGHT0, GL_POSITION, lightPos.data());
glLightfv(GL_LIGHT0, GL_DIFFUSE, light.getDiffuse().toArray4().data());
// glLightfv(GL_LIGHT0, GL_SPECULAR, light.getSpecular().toArray4().data());
glLightfv(GL_LIGHT0, GL_AMBIENT, white);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glLoadMatrixf(projectionMatrix.toArray().data());
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glLoadMatrixf(modelviewMatrix.toArray().data());
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, yellow);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, positions.data());
glEnableClientState(GL_NORMAL_ARRAY);
glNormalPointer(GL_FLOAT, 0, normals.data());
//glDrawArrays(GL_TRIANGLES, 0, static_cast<GLsizei>(positions.size()) / 3);
for (const auto& b : buffer.getBlocks()) {
const auto& indices = b.getIndices();
glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(indices.size()), GL_UNSIGNED_INT, indices.data());
}
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glDisable(GL_LIGHTING);
glDisable(GL_LIGHT0);
glDisable(GL_DEPTH_TEST);
}示例4: addToTriangleBuffer
void TorusKnotGenerator::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert(mNumSegSection>0 && mNumSegCircle>0 && "Num seg and circle must be positive");
assert(mRadius>0. && mSectionRadius>0. && "Radius and section radius must be positive");
assert(mP>0 && mQ>0 && "p and q must be positive");
buffer.rebaseOffset();
buffer.estimateVertexCount((mNumSegCircle*mP+1)*(mNumSegSection+1));
buffer.estimateIndexCount((mNumSegCircle*mP)*(mNumSegSection+1)*6);
int offset = 0;
for (int i = 0; i <= mNumSegCircle * mP;i++)
{
Real phi = Math::TWO_PI * i/(Real)mNumSegCircle;
Real x0 = mRadius*(2 + cos(mQ*phi/(Real)mP)) * cos(phi) / 3.f;
Real y0 = mRadius*sin(mQ*phi/(Real)mP) / 3.f;
Real z0 = mRadius*(2 + cos(mQ*phi/(Real)mP)) * sin(phi) / 3.f;
Real phi1 = Math::TWO_PI * (i+1)/(Real)mNumSegCircle;
Real x1 = mRadius*(2 + cos(mQ*phi1/(Real)mP)) * cos(phi1) / 3.f;
Real y1 = mRadius*sin(mQ*phi1/mP) / 3.f;
Real z1 = mRadius*(2 + cos(mQ*phi1/(Real)mP)) * sin(phi1) / 3.f;
Vector3 v0(x0,y0,z0);
Vector3 v1(x1,y1,z1);
Vector3 direction((v1-v0).normalisedCopy());
Quaternion q = Utils::_computeQuaternion(direction);
for (int j =0;j<=mNumSegSection;j++)
{
Real alpha = Math::TWO_PI *j/mNumSegSection;
Vector3 vp = mSectionRadius*(q * Vector3(cos(alpha), sin(alpha),0));
addPoint(buffer, v0+vp,
vp.normalisedCopy(),
Vector2(i/(Real)mNumSegCircle, j/(Real)mNumSegSection));
if (i != mNumSegCircle * mP)
{
buffer.index(offset + mNumSegSection + 1);
buffer.index(offset + mNumSegSection);
buffer.index(offset);
buffer.index(offset + mNumSegSection + 1);
buffer.index(offset);
buffer.index(offset + 1);
}
offset ++;
}
}
}示例5: Modify
void SphereUVModifier::Modify(TriangleBuffer& Buffer)
{
for( VertexIterator VertIt = Buffer.GetVertices().begin() ; VertIt != Buffer.GetVertices().end() ; ++VertIt )
{
Vector3 NormalizedPos = VertIt->Position.GetNormal();
Vector2 VecXZ(NormalizedPos.X,NormalizedPos.Z);
VertIt->UV.X = Vector2::Unit_X().AngleTo(VecXZ) / MathTools::GetTwoPi();
VertIt->UV.Y = ( MathTools::ATan(NormalizedPos.Y / VecXZ.Length()) + MathTools::GetHalfPi() ) / MathTools::GetPi();
}
}示例6: _latheBodyImpl
//-----------------------------------------------------------------------
void Lathe::_latheBodyImpl(TriangleBuffer& buffer, const Shape* shapeToExtrude) const
{
int numSegShape = shapeToExtrude->getSegCount();
assert(numSegShape>1 && "Shape must contain at least two points");
int offset =0;
//int numSeg = mClosed?mNumSeg+1:mNumSeg;
int numSeg = mNumSeg+1;
buffer.rebaseOffset();
buffer.estimateIndexCount(numSeg*numSegShape*6);
buffer.estimateVertexCount((numSegShape+1)*(numSeg+1));
Radian angleEnd(mAngleEnd);
if (mAngleBegin>mAngleEnd)
angleEnd+=(Radian)Math::TWO_PI;
for (int i=0;i<numSeg;i++)
{
Radian angle;
if (mClosed)
angle = i/(Real)mNumSeg*Math::TWO_PI;
else
angle = mAngleBegin + i/(Real)mNumSeg*(angleEnd-mAngleBegin);
Quaternion q;
q.FromAngleAxis(angle,Vector3::UNIT_Y);
for (int j=0;j<=numSegShape;j++)
{
const Vector2& v0 = shapeToExtrude->getPoint(j);
Vector3 vp(v0.x,v0.y,0);
const Vector2& vp2direction = shapeToExtrude->getAvgDirection(j);
Vector2 vp2normal = vp2direction.perpendicular();
Vector3 normal(vp2normal.x, vp2normal.y, 0);
normal.normalise();
if (shapeToExtrude->getOutSide() == SIDE_RIGHT)
normal = -normal;
addPoint(buffer, q*vp,
q*normal,
Vector2(i/(Real)mNumSeg, j/(Real)numSegShape));
if (j <numSegShape && i <numSeg-1)
{
if (shapeToExtrude->getOutSide() == SIDE_RIGHT)
{
buffer.triangle(offset + numSegShape + 2, offset, offset + numSegShape + 1);
buffer.triangle(offset + numSegShape + 2, offset + 1, offset);
}
else
{
buffer.triangle(offset + numSegShape + 2, offset + numSegShape + 1, offset);
buffer.triangle(offset + numSegShape + 2, offset, offset + 1);
}
}
offset ++;
}
}
}示例7: addToTriangleBuffer
void Lathe::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert( mShapeToExtrude && "Shape must not be null!");
int numSegShape = mShapeToExtrude->getSegCount();
assert(numSegShape>1 && "Shape must contain at least two points");
int offset =0;
buffer.rebaseOffset();
buffer.estimateIndexCount(mNumSeg*numSegShape*6);
buffer.estimateVertexCount((numSegShape+1)*(mNumSeg+1));
for (int i=0;i<=mNumSeg;i++)
{
Real angle = i/(Real)mNumSeg*Math::TWO_PI;
Quaternion q;
q.FromAngleAxis((Radian)angle,Vector3::UNIT_Y);
for (int j=0;j<=numSegShape;j++)
{
Vector2 v0 = mShapeToExtrude->getPoint(j);
Vector3 vp(v0.x,v0.y,0);
Vector2 vp2direction = mShapeToExtrude->getAvgDirection(j);
Vector2 vp2normal = vp2direction.perpendicular();
Vector3 normal(vp2normal.x, vp2normal.y, 0);
normal.normalise();
if (mShapeToExtrude->getOutSide() == SIDE_LEFT)
{
normal = -normal;
}
addPoint(buffer, q*vp,
q*normal,
Vector2(i/(Real)mNumSeg, j/(Real)numSegShape));
if (j <numSegShape && i <mNumSeg)
{
buffer.index(offset + numSegShape + 2);
buffer.index(offset);
buffer.index(offset + numSegShape + 1);
buffer.index(offset + numSegShape + 2);
buffer.index(offset + 1);
buffer.index(offset);
}
offset ++;
}
}
}示例8: addToTriangleBuffer
void SphereGenerator::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert(mNumRings>0 && mNumSegments>0 && "Num seg must be positive");
assert(mRadius>0 && "Radius must be positive");
buffer.rebaseOffset();
buffer.estimateVertexCount((mNumRings+1)*(mNumSegments+1));
buffer.estimateIndexCount(mNumRings*(mNumSegments+1)*6);
Real fDeltaRingAngle = (Math::PI / mNumRings);
Real fDeltaSegAngle = (Math::TWO_PI / mNumSegments);
int offset = 0;
// Generate the group of rings for the sphere
for(unsigned int ring = 0; ring <= mNumRings; ring++ ) {
Real r0 = mRadius * sinf (ring * fDeltaRingAngle);
Real y0 = mRadius * cosf (ring * fDeltaRingAngle);
// Generate the group of segments for the current ring
for(unsigned int seg = 0; seg <= mNumSegments; seg++) {
Real x0 = r0 * sinf(seg * fDeltaSegAngle);
Real z0 = r0 * cosf(seg * fDeltaSegAngle);
// Add one vertex to the strip which makes up the sphere
addPoint(buffer, Vector3(x0, y0, z0),
Vector3(x0, y0, z0).normalisedCopy(),
Vector2((Real) seg / (Real) mNumSegments, (Real) ring / (Real) mNumRings));
if (ring != mNumRings) {
// each vertex (except the last) has six indices pointing to it
buffer.index(offset + mNumSegments + 1);
buffer.index(offset);
buffer.index(offset + mNumSegments);
buffer.index(offset + mNumSegments + 1);
buffer.index(offset + 1);
buffer.index(offset);
offset ++;
}
}; // end for seg
} // end for ring
}示例9: _latheCapImpl
//-----------------------------------------------------------------------
void Lathe::_latheCapImpl(TriangleBuffer& buffer) const
{
std::vector<int> indexBuffer;
PointList pointList;
buffer.rebaseOffset();
Triangulator t;
Shape shapeCopy;
MultiShape multishapeCopy;
if (mShapeToExtrude)
{
shapeCopy = *mShapeToExtrude;
shapeCopy.close();
t.setShapeToTriangulate(&shapeCopy);
}
else
{
multishapeCopy = *mMultiShapeToExtrude;
multishapeCopy.close();
t.setMultiShapeToTriangulate(mMultiShapeToExtrude);
}
t.triangulate(indexBuffer, pointList);
buffer.estimateIndexCount(2*indexBuffer.size());
buffer.estimateVertexCount(2*pointList.size());
//begin cap
buffer.rebaseOffset();
Quaternion q;
q.FromAngleAxis(mAngleBegin, Vector3::UNIT_Y);
for (size_t j =0;j<pointList.size();j++)
{
Vector2 vp2 = pointList[j];
Vector3 vp(vp2.x, vp2.y, 0);
Vector3 normal = Vector3::UNIT_Z;
addPoint(buffer, q*vp,
q*normal,
vp2);
}
for (size_t i=0;i<indexBuffer.size()/3;i++)
{
buffer.index(indexBuffer[i*3]);
buffer.index(indexBuffer[i*3+1]);
buffer.index(indexBuffer[i*3+2]);
}
//end cap
buffer.rebaseOffset();
q.FromAngleAxis(mAngleEnd, Vector3::UNIT_Y);
for (size_t j =0;j<pointList.size();j++)
{
Vector2 vp2 = pointList[j];
Vector3 vp(vp2.x, vp2.y, 0);
Vector3 normal = -Vector3::UNIT_Z;
addPoint(buffer, q*vp,
q*normal,
vp2);
}
for (size_t i=0;i<indexBuffer.size()/3;i++)
{
buffer.index(indexBuffer[i*3]);
buffer.index(indexBuffer[i*3+2]);
buffer.index(indexBuffer[i*3+1]);
}
}示例10: addToTriangleBuffer
void CylinderGenerator::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert(mHeight>0. && mRadius>0. && "height and radius must be positive");
assert(mNumSegBase>0 && mNumSegHeight>0 && "Num seg must be positive integers");
buffer.rebaseOffset();
if (mCapped)
{
buffer.estimateVertexCount((mNumSegHeight+1)*(mNumSegBase+1)+2*(mNumSegBase+1)+2);
buffer.estimateIndexCount(mNumSegHeight*(mNumSegBase+1)*6+6*mNumSegBase);
} else {
buffer.estimateVertexCount((mNumSegHeight+1)*(mNumSegBase+1));
buffer.estimateIndexCount(mNumSegHeight*(mNumSegBase+1)*6);
}
Real deltaAngle = (Math::TWO_PI / mNumSegBase);
Real deltaHeight = mHeight/(Real)mNumSegHeight;
int offset = 0;
for (int i = 0; i <=mNumSegHeight; i++)
for (int j = 0; j<=mNumSegBase; j++)
{
Real x0 = mRadius * cosf(j*deltaAngle);
Real z0 = mRadius * sinf(j*deltaAngle);
addPoint(buffer, Vector3(x0, i*deltaHeight, z0),
Vector3(x0,0,z0).normalisedCopy(),
Vector2(j/(Real)mNumSegBase, i/(Real)mNumSegHeight));
if (i != mNumSegHeight)
{
buffer.index(offset + mNumSegBase + 1);
buffer.index(offset);
buffer.index(offset + mNumSegBase);
buffer.index(offset + mNumSegBase + 1);
buffer.index(offset + 1);
buffer.index(offset);
}
offset ++;
}
if (mCapped)
{
//low cap
int centerIndex = offset;
addPoint(buffer, Vector3::ZERO,
Vector3::NEGATIVE_UNIT_Y,
Vector2::UNIT_Y);
offset++;
for (int j=0;j<=mNumSegBase;j++)
{
Real x0 = mRadius * cosf(j*deltaAngle);
Real z0 = mRadius * sinf(j*deltaAngle);
addPoint(buffer, Vector3(x0, 0.0f, z0),
Vector3::NEGATIVE_UNIT_Y,
Vector2(j/(Real)mNumSegBase,0.0));
if (j!=mNumSegBase)
{
buffer.index(centerIndex);
buffer.index(offset);
buffer.index(offset+1);
}
offset++;
}
// high cap
centerIndex = offset;
addPoint(buffer, Vector3(0,mHeight,0),
Vector3::UNIT_Y,
Vector2::ZERO);
offset++;
for (int j=0;j<=mNumSegBase;j++)
{
Real x0 = mRadius * cosf(j*deltaAngle);
Real z0 = mRadius * sinf(j*deltaAngle);
addPoint(buffer, Vector3(x0, mHeight, z0),
Vector3::UNIT_Y,
Vector2(j/(Real)mNumSegBase,1.));
if (j!=mNumSegBase)
{
buffer.index(centerIndex);
buffer.index(offset+1);
buffer.index(offset);
}
offset++;
}
}
}示例11: glEnable
void DamBreakSample::demonstrate(const int width, const int height, const Crystal::Graphics::ICamera<float>& camera)
{
this->width = width;
this->height = height;
this->rotationMatrix = camera.getRotationMatrix();
glEnable(GL_DEPTH_TEST);
interaction.simulate(1.0f / 60.0f);
PointLight<float> light;
light.setPos(Vector3d<float>(10.0f, 10.0f, -10.0f));
light.setDiffuse(ColorRGBA<float>(1.0f, 0.0f, 0.0f, 1.0f));
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
for (auto r : rigids) {
const auto matrix = r->getTransformMatrix();
auto p = r->getShape()->clone(r->getShape()->getId());
p->transform(matrix);
glViewport(0, 0, width, height);
TriangleBuffer triangleBuffer;
triangleBuffer.add(*p);
//renderer.render(camera, lineBuffer);
Material material;
material.setAmbient(ColorRGBA<float>(0.2, 0.2, 0.2, 0.0));
smoothRenderer.render(camera, triangleBuffer, light, material);
glViewport(0, 0, fb.getWidth(), fb.getHeight());
fb.bind();
idRenderer.render(camera, triangleBuffer);
fb.unbind();
delete p;
}
glClearColor(0.7f, 0.7f, 0.7f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
for (auto r : rigids) {
const auto matrix = r->getTransformMatrix();
auto p = r->getShape()->clone(r->getShape()->getId());
p->transform(matrix);
glViewport(0, 0, width, height);
TriangleBuffer triangleBuffer;
triangleBuffer.add(*p);
//renderer.render(camera, lineBuffer);
Material material;
smoothRenderer.render(camera, triangleBuffer, light, material);
//glViewport(0, 0, fb.getWidth(), fb.getHeight());
delete p;
}
glViewport(0, 0, width, height);
const auto& particles = fluid->getParticles();
float minPressure = +FLT_MAX;
float maxPressure = -FLT_MAX;
for (auto p : particles) {
minPressure = std::min<float>(minPressure, p->getDensity());
maxPressure = std::max<float>(maxPressure, p->getDensity());
}
colorMap.setMinMax(900.0f, 1400.0f);
//colorMap.setMinMax(800.0f, 2000.0f);
PointBuffer buffer;
for (auto p : particles) {
const auto pos = p->getPosition();
auto color = colorMap.getColor(p->getDensity());
color.setAlpha(0.5f);
Crystal::Graphics::Point point(pos, color, 500.0f);
buffer.add(point);
}
pointRenderer.render(camera, buffer);
}示例12: addToTriangleBuffer
void CapsuleGenerator::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert(mNumRings>0 && mNumSegments>0 && mNumSegHeight>0 && "Num seg must be positive integers");
assert(mHeight>0. && mRadius>0. && "mHeight and radius must be positive");
buffer.rebaseOffset();
buffer.estimateVertexCount((2*mNumRings+2)*(mNumSegments+1) + (mNumSegHeight-1)*(mNumSegments+1));
buffer.estimateIndexCount((2*mNumRings+1)*(mNumSegments+1)*6 + (mNumSegHeight-1)*(mNumSegments+1)*6);
Real fDeltaRingAngle = (Math::HALF_PI / mNumRings);
Real fDeltaSegAngle = (Math::TWO_PI / mNumSegments);
Real sphereRatio = mRadius / (2 * mRadius + mHeight);
Real cylinderRatio = mHeight / (2 * mRadius + mHeight);
int offset = 0;
// Top half sphere
// Generate the group of rings for the sphere
for(unsigned int ring = 0; ring <= mNumRings; ring++ )
{
Real r0 = mRadius * sinf ( ring * fDeltaRingAngle);
Real y0 = mRadius * cosf (ring * fDeltaRingAngle);
// Generate the group of segments for the current ring
for(unsigned int seg = 0; seg <= mNumSegments; seg++)
{
Real x0 = r0 * cosf(seg * fDeltaSegAngle);
Real z0 = r0 * sinf(seg * fDeltaSegAngle);
// Add one vertex to the strip which makes up the sphere
addPoint(buffer, Vector3(x0, 0.5f*mHeight + y0, z0),
Vector3(x0, y0, z0).normalisedCopy(),
Vector2((Real) seg / (Real) mNumSegments, (Real) ring / (Real) mNumRings * sphereRatio));
// each vertex (except the last) has six indices pointing to it
buffer.index(offset + mNumSegments + 1);
buffer.index(offset + mNumSegments);
buffer.index(offset);
buffer.index(offset + mNumSegments + 1);
buffer.index(offset);
buffer.index(offset + 1);
offset ++;
} // end for seg
} // end for ring
// Cylinder part
Real deltaAngle = (Math::TWO_PI / mNumSegments);
Real deltamHeight = mHeight/(Real)mNumSegHeight;
for (unsigned short i = 1; i < mNumSegHeight; i++)
for (unsigned short j = 0; j<=mNumSegments; j++)
{
Real x0 = mRadius * cosf(j*deltaAngle);
Real z0 = mRadius * sinf(j*deltaAngle);
addPoint(buffer, Vector3(x0, 0.5f*mHeight-i*deltamHeight, z0),
Vector3(x0,0,z0).normalisedCopy(),
Vector2(j/(Real)mNumSegments, i/(Real)mNumSegHeight * cylinderRatio + sphereRatio));
buffer.index(offset + mNumSegments + 1);
buffer.index(offset + mNumSegments);
buffer.index(offset);
buffer.index(offset + mNumSegments + 1);
buffer.index(offset);
buffer.index(offset + 1);
offset ++;
}
// Bottom half sphere
// Generate the group of rings for the sphere
for(unsigned int ring = 0; ring <= mNumRings; ring++)
{
Real r0 = mRadius * sinf (Math::HALF_PI + ring * fDeltaRingAngle);
Real y0 = mRadius * cosf (Math::HALF_PI + ring * fDeltaRingAngle);
// Generate the group of segments for the current ring
for(unsigned int seg = 0; seg <= mNumSegments; seg++)
{
Real x0 = r0 * cosf(seg * fDeltaSegAngle);
Real z0 = r0 * sinf(seg * fDeltaSegAngle);
// Add one vertex to the strip which makes up the sphere
addPoint(buffer, Vector3(x0, -0.5f*mHeight + y0, z0),
Vector3(x0, y0, z0).normalisedCopy(),
Vector2((Real) seg / (Real) mNumSegments, (Real) ring / (Real) mNumRings*sphereRatio + cylinderRatio + sphereRatio));
if (ring != mNumRings)
{
// each vertex (except the last) has six indices pointing to it
buffer.index(offset + mNumSegments + 1);
buffer.index(offset + mNumSegments);
buffer.index(offset);
buffer.index(offset + mNumSegments + 1);
buffer.index(offset);
buffer.index(offset + 1);
}
offset ++;
//.........这里部分代码省略.........
示例13: addToTriangleBuffer
void IcoSphereGenerator::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert(mRadius>0. && "Radius must me positive");
assert(mNumIterations>0 && "numIterations must be positive");
std::vector<Vector3> vertices;
int offset = 0;
/// Step 1 : Generate icosahedron
Real phi = .5f*(1.f+sqrt(5.f));
Real invnorm = 1/sqrt(phi*phi+1);
vertices.push_back(invnorm*Vector3(-1, phi, 0));//0
vertices.push_back(invnorm*Vector3( 1, phi, 0));//1
vertices.push_back(invnorm*Vector3(0, 1, -phi));//2
vertices.push_back(invnorm*Vector3(0, 1, phi));//3
vertices.push_back(invnorm*Vector3(-phi,0, -1));//4
vertices.push_back(invnorm*Vector3(-phi,0, 1));//5
vertices.push_back(invnorm*Vector3( phi,0, -1));//6
vertices.push_back(invnorm*Vector3( phi,0, 1));//7
vertices.push_back(invnorm*Vector3(0, -1, -phi));//8
vertices.push_back(invnorm*Vector3(0, -1, phi));//9
vertices.push_back(invnorm*Vector3(-1, -phi,0));//10
vertices.push_back(invnorm*Vector3( 1, -phi,0));//11
int firstFaces[] = {0,1,2,
0,3,1,
0,4,5,
1,7,6,
1,6,2,
1,3,7,
0,2,4,
0,5,3,
2,6,8,
2,8,4,
3,5,9,
3,9,7,
11,6,7,
10,5,4,
10,4,8,
10,9,5,
11,8,6,
11,7,9,
10,8,11,
10,11,9
};
std::vector<int> faces(firstFaces, firstFaces + sizeof(firstFaces)/sizeof(*firstFaces));
int size = 60;
/// Step 2 : tessellate
for (unsigned short iteration = 0; iteration<mNumIterations; iteration++)
{
size*=4;
std::vector<int> newFaces;
newFaces.clear();
//newFaces.resize(size);
for (int i=0; i<size/12; i++)
{
int i1 = faces[i*3];
int i2 = faces[i*3+1];
int i3 = faces[i*3+2];
int i12 = vertices.size();
int i23 = i12+1;
int i13 = i12+2;
Vector3 v1 = vertices[i1];
Vector3 v2 = vertices[i2];
Vector3 v3 = vertices[i3];
//make 1 vertice at the center of each edge and project it onto the sphere
vertices.push_back((v1+v2).normalisedCopy());
vertices.push_back((v2+v3).normalisedCopy());
vertices.push_back((v1+v3).normalisedCopy());
//now recreate indices
newFaces.push_back(i1);
newFaces.push_back(i12);
newFaces.push_back(i13);
newFaces.push_back(i2);
newFaces.push_back(i23);
newFaces.push_back(i12);
newFaces.push_back(i3);
newFaces.push_back(i13);
newFaces.push_back(i23);
newFaces.push_back(i12);
newFaces.push_back(i23);
newFaces.push_back(i13);
}
faces.swap(newFaces);
}
/// Step 3 : generate texcoords
std::vector<Vector2> texCoords;
for (unsigned short i=0;i<vertices.size();i++)
{
const Vector3& vec = vertices[i];
Real u, v;
Real r0 = sqrtf(vec.x*vec.x+vec.z*vec.z);
Real alpha;
alpha = atan2f(vec.z,vec.x);
u = alpha/Math::TWO_PI+.5f;
v = atan2f(vec.y, r0)/Math::PI + .5f;
//.........这里部分代码省略.........
示例14: addToTriangleBuffer
void PlaneGenerator::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert(mNumSegX>0 && mNumSegY>0 && "Num seg must be positive");
assert(!mNormal.isZeroLength() && "Normal must not be null");
assert(mSizeX>0. && mSizeY>0. && "Size must be positive");
buffer.rebaseOffset();
buffer.estimateVertexCount((mNumSegX+1)*(mNumSegY+1));
buffer.estimateIndexCount(mNumSegX*mNumSegY*6);
int offset = 0;
Vector3 vX = mNormal.perpendicular();
Vector3 vY = mNormal.crossProduct(vX);
Vector3 delta1 = mSizeX / (Real)mNumSegX * vX;
Vector3 delta2 = mSizeY / (Real)mNumSegY * vY;
// build one corner of the square
Vector3 orig = -0.5f*mSizeX*vX - 0.5f*mSizeY*vY;
for (unsigned short i1 = 0; i1<=mNumSegX; i1++)
for (unsigned short i2 = 0; i2<=mNumSegY; i2++)
{
addPoint(buffer, orig+i1*delta1+i2*delta2,
mNormal,
Vector2(i1/(Real)mNumSegX, i2/(Real)mNumSegY));
}
bool reverse = false;
if (delta1.crossProduct(delta2).dotProduct(mNormal)>0)
reverse= true;
for (unsigned short n1 = 0; n1<mNumSegX; n1++)
{
for (unsigned short n2 = 0; n2<mNumSegY; n2++)
{
if (reverse)
{
buffer.index(offset+0);
buffer.index(offset+(mNumSegY+1));
buffer.index(offset+1);
buffer.index(offset+1);
buffer.index(offset+(mNumSegY+1));
buffer.index(offset+(mNumSegY+1)+1);
}
else
{
buffer.index(offset+0);
buffer.index(offset+1);
buffer.index(offset+(mNumSegY+1));
buffer.index(offset+1);
buffer.index(offset+(mNumSegY+1)+1);
buffer.index(offset+(mNumSegY+1));
}
offset++;
}
offset++;
}
}示例15: addToTriangleBuffer
void CapsuleGenerator::addToTriangleBuffer(TriangleBuffer& buffer) const
{
assert(numRings>0 && numSegments>0 && numSegHeight>0 && "Num seg must be positive integers");
assert(height>0. && radius>0. && "Height and radius must be positive");
buffer.rebaseOffset();
buffer.estimateVertexCount((2*numRings+2)*(numSegments+1) + (numSegHeight-1)*(numSegments+1));
buffer.estimateIndexCount((2*numRings+1)*(numSegments+1)*6 + (numSegHeight-1)*(numSegments+1)*6);
Ogre::Real fDeltaRingAngle = (Ogre::Math::HALF_PI / numRings);
Ogre::Real fDeltaSegAngle = (Ogre::Math::TWO_PI / numSegments);
Ogre::Real sphereRatio = radius / (2 * radius + height);
Ogre::Real cylinderRatio = height / (2 * radius + height);
int offset = 0;
// Top half sphere
// Generate the group of rings for the sphere
for(unsigned int ring = 0; ring <= numRings; ring++ )
{
Ogre::Real r0 = radius * sinf ( ring * fDeltaRingAngle);
Ogre::Real y0 = radius * cosf (ring * fDeltaRingAngle);
// Generate the group of segments for the current ring
for(unsigned int seg = 0; seg <= numSegments; seg++)
{
Ogre::Real x0 = r0 * cosf(seg * fDeltaSegAngle);
Ogre::Real z0 = r0 * sinf(seg * fDeltaSegAngle);
// Add one vertex to the strip which makes up the sphere
buffer.position( x0, 0.5*height + y0, z0);
if (enableNormals)
buffer.normal(Ogre::Vector3(x0, y0, z0).normalisedCopy());
for (unsigned int tc=0;tc<numTexCoordSet;tc++)
buffer.textureCoord((Ogre::Real) seg / (Ogre::Real) numSegments * uTile, (Ogre::Real) ring / (Ogre::Real) numRings * vTile * sphereRatio);
// each vertex (except the last) has six indices pointing to it
buffer.index(offset + numSegments + 1);
buffer.index(offset + numSegments);
buffer.index(offset);
buffer.index(offset + numSegments + 1);
buffer.index(offset);
buffer.index(offset + 1);
offset ++;
} // end for seg
} // end for ring
// Cylinder part
Ogre::Real deltaAngle = (Ogre::Math::TWO_PI / numSegments);
Ogre::Real deltaHeight = height/(Ogre::Real)numSegHeight;
for (int i = 1; i < numSegHeight; i++)
for (int j = 0; j<=numSegments; j++)
{
Ogre::Real x0 = radius * cosf(j*deltaAngle);
Ogre::Real z0 = radius * sinf(j*deltaAngle);
buffer.position(x0, 0.5*height-i*deltaHeight, z0);
buffer.normal(Ogre::Vector3(x0,0,z0).normalisedCopy());
buffer.textureCoord(j/(Ogre::Real)numSegments*uTile, i/(Ogre::Real)numSegHeight*vTile * cylinderRatio + sphereRatio);
buffer.index(offset + numSegments + 1);
buffer.index(offset + numSegments);
buffer.index(offset);
buffer.index(offset + numSegments + 1);
buffer.index(offset);
buffer.index(offset + 1);
offset ++;
}
// Bottom half sphere
// Generate the group of rings for the sphere
for(unsigned int ring = 0; ring <= numRings; ring++)
{
Ogre::Real r0 = radius * sinf (Ogre::Math::HALF_PI + ring * fDeltaRingAngle);
Ogre::Real y0 = radius * cosf (Ogre::Math::HALF_PI + ring * fDeltaRingAngle);
// Generate the group of segments for the current ring
for(unsigned int seg = 0; seg <= numSegments; seg++)
{
Ogre::Real x0 = r0 * cosf(seg * fDeltaSegAngle);
Ogre::Real z0 = r0 * sinf(seg * fDeltaSegAngle);
// Add one vertex to the strip which makes up the sphere
buffer.position( x0, -0.5*height + y0, z0);
if (enableNormals)
buffer.normal(Ogre::Vector3(x0, y0, z0).normalisedCopy());
for (unsigned int tc=0;tc<numTexCoordSet;tc++)
buffer.textureCoord((Ogre::Real) seg / (Ogre::Real) numSegments * uTile, (Ogre::Real) ring / (Ogre::Real) numRings * vTile*sphereRatio + cylinderRatio + sphereRatio);
if (ring != numRings)
{
// each vertex (except the last) has six indices pointing to it
buffer.index(offset + numSegments + 1);
buffer.index(offset + numSegments);
buffer.index(offset);
buffer.index(offset + numSegments + 1);
buffer.index(offset);
//.........这里部分代码省略.........