Mesh* MeshBuilder::GenerateRing(const std::string &meshName, Color color, float innerRadius, unsigned numSlices)
{
std::vector<Vertex> vertex_buffer_data;
std::vector<GLuint> index_buffer_data;
Vertex v;
float anglePerSlice = 360.f / numSlices;
for (unsigned i = 0; i < numSlices + 1; ++i)
{
float theta = i * anglePerSlice;
v.pos.Set(CircleX(theta), 0, CircleZ(theta));
v.color = color;
vertex_buffer_data.push_back(v);
v.pos.Set(innerRadius * CircleX(theta), 0, innerRadius*CircleZ(theta));
v.color = color;
vertex_buffer_data.push_back(v);
}
for (unsigned i = 0; i < numSlices + 1; ++i)
{
index_buffer_data.push_back(2 * i);
index_buffer_data.push_back(2 * i + 1);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vertex_buffer_data.size()*sizeof(Vertex), &vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ARRAY_BUFFER, index_buffer_data.size()*sizeof(GLuint), &index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateCone(const std::string &meshName, Color color, unsigned numSlice)
{
std::vector<Vertex> vertex_buffer_data;
std::vector<GLuint> index_buffer_data;
Vertex v;
//Cone shape
float anglePerSlice = 360.f / numSlice;
for (unsigned slice = 0; slice < numSlice + 1; ++slice)
{
float theta = slice * anglePerSlice;
v.pos.Set(CircleX(theta), 0, CircleZ(theta));
v.color = color;
v.normal.Set (CircleX(theta), 1, CircleZ(theta));
vertex_buffer_data.push_back(v);
}
v.pos.Set(0, 1 , 0);
v.color = color;
vertex_buffer_data.push_back(v);
for (unsigned slice = 0; slice < numSlice + 1; slice++)
{
index_buffer_data.push_back(slice);
index_buffer_data.push_back(numSlice + 1);
}
//Circle
for (unsigned slice = 0; slice < numSlice + 1; ++slice)
{
float theta = slice * anglePerSlice;
v.pos.Set(CircleX(theta), 0, CircleZ(theta));
v.color = color;
v.normal = (0, -1, 0);
vertex_buffer_data.push_back(v);
}
for (unsigned slice = 0; slice < numSlice + 1; ++slice)
{
v.pos.Set(0, 0, 0);
v.color = color;
vertex_buffer_data.push_back(v);
}
for (unsigned slice = 0; slice < numSlice + 1; slice++)
{
index_buffer_data.push_back(slice);
index_buffer_data.push_back(numSlice);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vertex_buffer_data.size() * sizeof(Vertex), &vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, index_buffer_data.size() * sizeof(GLuint), &index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateCone(const std::string &meshName, Color color, unsigned numSlices)
{
std::vector<Vertex> cone_vertex_buffer_data;
std::vector<GLuint> cone_index_buffer_data;
Vertex cone;
float anglePerSlice = 360.f / numSlices;
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
float theta = slice * anglePerSlice;
cone.pos.Set(CircleX(theta), 0, CircleZ(theta));
cone.color = color;
cone.normal.Set(0, 1, 0);
cone_vertex_buffer_data.push_back(cone);
}
cone.pos.Set(0, 1, 0);
cone.color = color;
cone.normal.Set(0, 1, 0);
cone_vertex_buffer_data.push_back(cone);
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
cone_index_buffer_data.push_back(slice);
cone_index_buffer_data.push_back(numSlices + 1);
}
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
float theta = slice * anglePerSlice;
cone.pos.Set(CircleX(theta), 0, CircleZ(theta));
cone.color = color;
cone.normal.Set(0, -1, 0);
cone_vertex_buffer_data.push_back(cone);
}
for (unsigned slice = numSlices + 1; slice > 0; --slice)
{
cone_index_buffer_data.push_back(slice);
cone_index_buffer_data.push_back(numSlices + 1);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, cone_vertex_buffer_data.size() * sizeof(Vertex), &cone_vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ARRAY_BUFFER, cone_index_buffer_data.size() * sizeof(GLuint), &cone_index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = cone_index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateRing(const std::string &meshName, Color color, float outerRadius, float innerRadius, unsigned numSlices)
{
std::vector<Vertex> vertex_buffer_data;
std::vector<GLuint> index_buffer_data;
Vertex v;
float scaleRatio = 10;
float anglePerSlice = 360.0f / numSlices;
//Top
for (unsigned i = 0; i < numSlices + 1; ++i)
{
float theta = i * anglePerSlice;
v.pos.Set((innerRadius / scaleRatio)*CircleX(theta), 0, (innerRadius / scaleRatio)*CircleZ(theta));
v.color = color;
v.normal.Set(0, 1, 0);
vertex_buffer_data.push_back(v);
v.pos.Set((outerRadius / scaleRatio)*CircleX(theta), 0, (outerRadius / scaleRatio)*CircleZ(theta));
v.normal.Set(0, 1, 0);
v.color = color;
vertex_buffer_data.push_back(v);
}
//Underside
for (unsigned i = 0; i < numSlices + 1; ++i)
{
float theta = i * -anglePerSlice;
v.pos.Set((innerRadius / scaleRatio)*CircleX(theta), -0.01, (innerRadius / scaleRatio)*CircleZ(theta));
v.color = color;
v.normal.Set(0, -1, 0);
vertex_buffer_data.push_back(v);
v.pos.Set((outerRadius / scaleRatio)*CircleX(theta), -0.01, (outerRadius / scaleRatio)*CircleZ(theta));
v.normal.Set(0, -1, 0);
v.color = color;
vertex_buffer_data.push_back(v);
}
for (unsigned i = 0; i < vertex_buffer_data.size(); ++i)
{
index_buffer_data.push_back(2 * i);
index_buffer_data.push_back(2 * i + 1);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vertex_buffer_data.size() * sizeof(Vertex), &vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, index_buffer_data.size() * sizeof(GLuint), &index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateCone(const std::string &meshName, Color color, unsigned numStacks)
{
std::vector<Vertex> vertex_buffer_data;
std::vector<GLuint> index_buffer_data;
Vertex v;
float height = 1;
float radius = 1;
float increments = 360.0f / numStacks;
for (int theta = 0; theta <= 360; theta += increments) //top
{
v.pos.Set(radius * CircleX(theta), -height, radius * CircleZ(theta));
v.color = color;
v.normal.Set(v.pos.x, 1, v.pos.z);
v.normal.Normalize();
vertex_buffer_data.push_back(v);
v.pos.Set(0, height, 0);
v.color = color;
v.normal.Set(v.pos.x, 1, v.pos.z);
v.normal.Normalize();
vertex_buffer_data.push_back(v);
}
for (int theta = 0; theta <= 360; theta += increments) //bottom
{
v.pos.Set(0, -height, 0);
v.color = color;
v.normal.Set(0, -1, 0);
vertex_buffer_data.push_back(v);
v.color = color;
v.pos.Set(radius * CircleX(theta), -height, radius * CircleZ(theta));
v.normal.Set(0, -1, 0);
vertex_buffer_data.push_back(v);
}
for (unsigned i = 0; i < vertex_buffer_data.size(); ++i)
{
index_buffer_data.push_back(2 * i);
index_buffer_data.push_back(2 * i + 1);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vertex_buffer_data.size() * sizeof(Vertex), &vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, index_buffer_data.size() * sizeof(GLuint), &index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateRing(const std::string &meshName, Color color, float innerRadius, unsigned numSlices)
{
std::vector<Vertex> ring_vertex_buffer_data;
std::vector<GLuint> ring_index_buffer_data;
Vertex ring;
float anglePerSlice = 360.f / numSlices;
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
float theta = slice * anglePerSlice;
ring.pos.Set(CircleX(theta), 0, CircleZ(theta));
ring.color = color;
ring.normal.Set(0, 1, 0);
ring_vertex_buffer_data.push_back(ring);
ring.pos.Set(innerRadius * CircleX(theta), 0, innerRadius * CircleZ(theta));
ring.color = color;
ring.normal.Set(0, 1, 0);
ring_vertex_buffer_data.push_back(ring);
}
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
ring_index_buffer_data.push_back(2 * slice);
ring_index_buffer_data.push_back(2 * slice + 1);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, ring_vertex_buffer_data.size() * sizeof(Vertex), &ring_vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ARRAY_BUFFER, ring_index_buffer_data.size() * sizeof(GLuint), &ring_index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = ring_index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateCylinder(const std::string &meshName, Color color, unsigned numStacks, unsigned numSlices)
{
std::vector<Vertex> cylinder_vertex_buffer_data;
std::vector<GLuint> cylinder_index_buffer_data;
Vertex cylinder;
float height = 5.f;
float stackHeight = height / numStacks;
float angleperslice = 360.f / numSlices;
for (unsigned stack = 0; stack < numStacks + 1; ++stack) // stack
{
for (float theta = 0; theta <= 360; theta += 10) // slice
{
//add_normal(x(theta), 0, z(theta))
cylinder.normal.Set(CircleX(theta), 0, CircleZ(theta));
cylinder.pos.Set(CircleX(theta), (-height / 2) + stack * stackHeight, CircleZ(theta));
cylinder.normal.Set(CircleX(theta), 0, CircleZ(theta));
cylinder.pos.Set(CircleX(theta), (-height / 2) + (stack + 1) * stackHeight, CircleZ(theta));
cylinder_vertex_buffer_data.push_back(cylinder);
cylinder.color = color;
}
}
for (float theta = 0; theta <= 360; theta += 10) // top
{
cylinder.normal.Set(0, 1, 0);
cylinder.pos.Set(0, -height / 2, 0);
cylinder.normal.Set(0, 1, 0);
cylinder.pos.Set(CircleX(theta), height / 2, CircleZ(theta));
cylinder_vertex_buffer_data.push_back(cylinder);
cylinder.color = color;
}
for (float theta = 0; theta <= 360; theta += 10) // bottom
{
cylinder.normal.Set(0, -1, 0);
cylinder.pos.Set(0, -height / 2, 0);
cylinder.normal.Set(0, -1, 0);
cylinder.pos.Set(CircleX(theta), -height / 2, CircleZ(theta));
cylinder_vertex_buffer_data.push_back(cylinder);
cylinder.color = color;
}
for (unsigned stack = 0; stack < numStacks + 1; stack += 1) // stack
{
for (unsigned slice = 0; slice * angleperslice <= 360; slice += 1) // slice
{
cylinder_index_buffer_data.push_back(stack * (numSlices + 1) + slice); // Note: numslice is used because it represent one 'round'
cylinder_index_buffer_data.push_back((stack + 1) * (numSlices + 1) + slice);
}
}
for (unsigned slice = numSlices + 1; slice > 0; --slice)
{
cylinder_index_buffer_data.push_back(slice);
cylinder_index_buffer_data.push_back(numSlices + 1);
}
for (unsigned slice = numSlices + 1; slice > 0; --slice)
{
cylinder_index_buffer_data.push_back(slice);
cylinder_index_buffer_data.push_back(numSlices + 1);
}
//OTHER CODE
//float anglePerSlice = 360.f / numSlices;
//for (unsigned slice = 0; slice < numSlices + 1; ++slice)
//{
// float theta = slice * anglePerSlice;
// cylinder.pos.Set(CircleX(theta), -0.5f, CircleZ(theta));
// cylinder.color = color;
// cylinder.normal.Set(CircleX(theta), 0, CircleZ(theta));
// cylinder_vertex_buffer_data.push_back(cylinder);
// cylinder.pos.Set(CircleX(theta), 0.5f, CircleZ(theta));
// cylinder.color = color;
// cylinder.normal.Set(CircleX(theta), 0, CircleZ(theta));
// cylinder_vertex_buffer_data.push_back(cylinder);
//}
//
//for (unsigned slice = 0; slice < numSlices + 1; ++slice)
//{
// cylinder_index_buffer_data.push_back(2 * slice);
// cylinder_index_buffer_data.push_back(2 * slice + 1);
//}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, cylinder_vertex_buffer_data.size() * sizeof(Vertex), &cylinder_vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ARRAY_BUFFER, cylinder_index_buffer_data.size() * sizeof(GLuint), &cylinder_index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = cylinder_index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateHemisphere(const std::string &meshName, Color color, unsigned numStacks, unsigned numSlices)
{
std::vector<Vertex> hemisphere_vertex_buffer_data;
std::vector<GLuint> hemisphere_index_buffer_data;
Vertex hemisphere;
float anglePerStack = 180.f / numStacks;
float anglePerSlice = 360.f / numSlices;
//Hemisphere
for (unsigned stack = 0; stack < numStacks + 1; ++stack)
{
float phi = 0.f + stack * anglePerStack;
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
float theta = slice * anglePerSlice;
hemisphere.pos.Set(SphereX(phi, theta), SphereY(phi, theta), SphereZ(phi, theta));
hemisphere.normal.Set(SphereX(phi, theta), SphereY(phi, theta), SphereZ(phi, theta));
hemisphere.color = color;
hemisphere_vertex_buffer_data.push_back(hemisphere);
hemisphere.normal.Set(SphereX(phi + 10, theta), SphereY(phi + 10, theta), SphereZ(phi + 10, theta));
}
}
//Bottom
for (float theta = 0; theta <= 360; theta += 10)
{
hemisphere.normal.Set(0, -1, 0);
hemisphere.pos.Set(0, 0, 0);
hemisphere.normal.Set(0, -1, 0);
hemisphere.pos.Set(CircleX(theta), 0, CircleZ(theta));
hemisphere.color = color;
hemisphere_vertex_buffer_data.push_back(hemisphere);
}
for (unsigned stack = 0; stack < numStacks; ++stack)
{
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
hemisphere_index_buffer_data.push_back(stack * (numSlices + 1) + slice);
hemisphere_index_buffer_data.push_back((stack + 1) * (numSlices + 1) + slice);
}
}
for (unsigned slice = 0; slice < numSlices + 1; ++slice)
{
hemisphere_index_buffer_data.push_back(slice);
hemisphere_index_buffer_data.push_back(numSlices + 1);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, hemisphere_vertex_buffer_data.size() * sizeof(Vertex), &hemisphere_vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ARRAY_BUFFER, hemisphere_index_buffer_data.size() * sizeof(GLuint), &hemisphere_index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = hemisphere_index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
Mesh* MeshBuilder::GenerateCylinder(const std::string &meshName, Color color, unsigned numStacks)
{
std::vector<Vertex> vertex_buffer_data;
std::vector<GLuint> index_buffer_data;
Vertex v;
float height = 1;
float radius = 1;
int stackHeight = height / numStacks;
float angleperSlice = 360.f / numStacks;
for (unsigned slice = 0; slice < numStacks + 1; ++slice)
{
float theta = angleperSlice * slice;
v.pos.Set(CircleX(theta), 0, CircleZ(theta));
v.normal.Set(CircleX(theta), 0, CircleZ(theta));
v.color = color;
vertex_buffer_data.push_back(v);
v.pos.Set(CircleX(theta), height, CircleZ(theta));
v.color = color;
v.normal.Set(CircleX(theta), height, CircleZ(theta));
vertex_buffer_data.push_back(v);
};
for (int theta = 0; theta <= 360; theta += 10) //top
{
v.pos.Set(radius * CircleX(theta), height, radius * CircleZ(theta));
v.color = color;
v.normal.Set(0, 1, 0);
vertex_buffer_data.push_back(v);
v.pos.Set(0, height, 0);
v.color = color;
v.normal.Set(0, 1, 0);
vertex_buffer_data.push_back(v);
}
for (int theta = 0; theta <= 360; theta += 10) //bottom
{
v.pos.Set(0, 0, 0);
v.color = color;
v.normal.Set(0, -1, 0);
vertex_buffer_data.push_back(v);
v.color = color;
v.pos.Set(radius * CircleX(theta), 0, radius * CircleZ(theta));
v.normal.Set(0, -1, 0);
vertex_buffer_data.push_back(v);
}
for (unsigned slice = 0; slice < vertex_buffer_data.size() - 3; ++slice)
{
index_buffer_data.push_back((2 * slice));
index_buffer_data.push_back((2 * slice) + 1);
};
for (unsigned i = 0; i < vertex_buffer_data.size(); ++i)
{
index_buffer_data.push_back(2 * i);
index_buffer_data.push_back(2 * i + 1);
}
Mesh *mesh = new Mesh(meshName);
glBindBuffer(GL_ARRAY_BUFFER, mesh->vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, vertex_buffer_data.size() * sizeof(Vertex), &vertex_buffer_data[0], GL_STATIC_DRAW);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mesh->indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, index_buffer_data.size() * sizeof(GLuint), &index_buffer_data[0], GL_STATIC_DRAW);
mesh->indexSize = index_buffer_data.size();
mesh->mode = Mesh::DRAW_TRIANGLE_STRIP;
return mesh;
}
