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Builder.cpp
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#include <vsg/io/Logger.h>
#include <vsg/io/read.h>
#include <vsg/nodes/StateGroup.h>
#include <vsg/nodes/VertexIndexDraw.h>
#include <vsg/state/ColorBlendState.h>
#include <vsg/state/DepthStencilState.h>
#include <vsg/state/DescriptorBuffer.h>
#include <vsg/state/DescriptorImage.h>
#include <vsg/state/DescriptorSet.h>
#include <vsg/state/GraphicsPipeline.h>
#include <vsg/state/InputAssemblyState.h>
#include <vsg/state/MultisampleState.h>
#include <vsg/state/RasterizationState.h>
#include <vsg/state/VertexInputState.h>
#include <vsg/state/ViewDependentState.h>
#include <vsg/state/ViewportState.h>
#include <vsg/state/material.h>
#include <vsg/utils/Builder.h>
#include <vsg/utils/GraphicsPipelineConfig.h>
using namespace vsg;
void Builder::assignCompileTraversal(ref_ptr<CompileTraversal> ct)
{
compileTraversal = ct;
}
ref_ptr<StateGroup> Builder::createStateGroup(const StateInfo& stateInfo)
{
if (!sharedObjects)
{
if (options)
sharedObjects = options->sharedObjects;
else
sharedObjects = vsg::SharedObjects::create();
}
if (!shaderSet)
{
//shaderSet = createFlatShadedShaderSet(options);
//shaderSet = createPhysicsBasedRenderingShaderSet(options);
shaderSet = createPhongShaderSet(options);
}
auto graphicsPipelineConfig = vsg::GraphicsPipelineConfig::create(shaderSet);
auto& defines = graphicsPipelineConfig->shaderHints->defines;
// set up graphics pipeline
vsg::Descriptors descriptors;
// set up graphics pipeline
DescriptorSetLayoutBindings descriptorBindings;
if (stateInfo.image)
{
auto sampler = Sampler::create();
sampler->addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
sampler->addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
if (sharedObjects) sharedObjects->share(sampler);
graphicsPipelineConfig->assignTexture(descriptors, "diffuseMap", stateInfo.image, sampler);
if (stateInfo.greyscale) defines.push_back("VSG_GREYSACLE_DIFFUSE_MAP");
}
if (stateInfo.displacementMap)
{
auto sampler = Sampler::create();
sampler->addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
sampler->addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
if (sharedObjects) sharedObjects->share(sampler);
graphicsPipelineConfig->assignTexture(descriptors, "displacementMap", stateInfo.displacementMap, sampler);
}
// set up pass of material
auto mat = vsg::PhongMaterialValue::create();
mat->value().specular = vec4(0.5f, 0.5f, 0.5f, 1.0f);
graphicsPipelineConfig->assignUniform(descriptors, "material", mat);
if (sharedObjects) sharedObjects->share(descriptors);
// set up ViewDependentState
ref_ptr<ViewDescriptorSetLayout> vdsl;
if (sharedObjects)
vdsl = sharedObjects->shared_default<ViewDescriptorSetLayout>();
else
vdsl = ViewDescriptorSetLayout::create();
graphicsPipelineConfig->additionalDescrptorSetLayout = vdsl;
graphicsPipelineConfig->enableArray("vsg_Vertex", VK_VERTEX_INPUT_RATE_VERTEX, 12);
graphicsPipelineConfig->enableArray("vsg_Normal", VK_VERTEX_INPUT_RATE_VERTEX, 12);
graphicsPipelineConfig->enableArray("vsg_TexCoord0", VK_VERTEX_INPUT_RATE_VERTEX, 8);
if (stateInfo.instance_colors_vec4)
{
graphicsPipelineConfig->enableArray("vsg_Color", VK_VERTEX_INPUT_RATE_INSTANCE, 16);
}
if (stateInfo.instance_positions_vec3)
{
graphicsPipelineConfig->enableArray("vsg_position", VK_VERTEX_INPUT_RATE_INSTANCE, 12);
}
if (stateInfo.two_sided)
{
graphicsPipelineConfig->rasterizationState->cullMode = VK_CULL_MODE_NONE;
defines.push_back("VSG_TWO_SIDED_LIGHTING");
}
graphicsPipelineConfig->colorBlendState->attachments = ColorBlendState::ColorBlendAttachments{
{stateInfo.blending, VK_BLEND_FACTOR_SRC_ALPHA, VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA, VK_BLEND_OP_ADD, VK_BLEND_FACTOR_SRC_ALPHA, VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA, VK_BLEND_OP_SUBTRACT, VK_COLOR_COMPONENT_R_BIT | VK_COLOR_COMPONENT_G_BIT | VK_COLOR_COMPONENT_B_BIT | VK_COLOR_COMPONENT_A_BIT}};
if (stateInfo.wireframe)
{
graphicsPipelineConfig->inputAssemblyState->topology = VK_PRIMITIVE_TOPOLOGY_LINE_LIST;
}
// if required initialize GraphicsPipeline/Layout etc.
if (sharedObjects)
sharedObjects->share(graphicsPipelineConfig, [](auto gpc) { gpc->init(); });
else
graphicsPipelineConfig->init();
auto descriptorSet = vsg::DescriptorSet::create(graphicsPipelineConfig->descriptorSetLayout, descriptors);
if (sharedObjects) sharedObjects->share(descriptorSet);
auto bindDescriptorSet = vsg::BindDescriptorSet::create(VK_PIPELINE_BIND_POINT_GRAPHICS, graphicsPipelineConfig->layout, 0, descriptorSet);
if (sharedObjects) sharedObjects->share(bindDescriptorSet);
// create StateGroup as the root of the scene/command graph to hold the GraphicsProgram, and binding of Descriptors to decorate the whole graph
auto stateGroup = vsg::StateGroup::create();
stateGroup->add(graphicsPipelineConfig->bindGraphicsPipeline);
stateGroup->add(bindDescriptorSet);
// assign any custom ArrayState that may be required.
stateGroup->prototypeArrayState = shaderSet->getSuitableArrayState(graphicsPipelineConfig->shaderHints->defines);
auto bindViewDescriptorSets = BindViewDescriptorSets::create(VK_PIPELINE_BIND_POINT_GRAPHICS, graphicsPipelineConfig->layout, 1);
if (sharedObjects) sharedObjects->share(bindViewDescriptorSets);
stateGroup->add(bindViewDescriptorSets);
//if (sharedObjects) vsg::debug_stream([&](auto& fout) { sharedObjects->report(fout); });
return stateGroup;
}
void Builder::transform(const mat4& matrix, ref_ptr<vec3Array> vertices, ref_ptr<vec3Array> normals)
{
for (auto& v : *vertices)
{
v = matrix * v;
}
if (normals)
{
mat4 normal_matrix = inverse(matrix);
for (auto& n : *normals)
{
vec4 nv = vec4(n.x, n.y, n.z, 0.0) * normal_matrix;
n = normalize(vec3(nv.x, nv.y, nv.z));
}
}
}
vec3 Builder::y_texcoord(const StateInfo& info) const
{
if ((info.image && info.image->getLayout().origin == Origin::TOP_LEFT) ||
(info.displacementMap && info.displacementMap->getLayout().origin == Origin::TOP_LEFT))
{
return {1.0f, -1.0f, 0.0f};
}
else
{
return {0.0f, 1.0f, 1.0f};
}
}
ref_ptr<Node> Builder::createBox(const GeometryInfo& info, const StateInfo& stateInfo)
{
auto& subgraph = _boxes[info];
if (subgraph)
{
return subgraph;
}
uint32_t instanceCount = 1;
auto positions = info.positions;
if (positions)
{
if (positions->size() >= 1)
instanceCount = static_cast<uint32_t>(positions->size());
else
positions = {};
}
auto colors = info.colors;
if (colors && colors->valueCount() != instanceCount) colors = {};
if (!colors) colors = vec4Array::create(instanceCount, info.color);
// create StateGroup as the root of the scene/command graph to hold the GraphicsProgram, and binding of Descriptors to decorate the whole graph
auto scenegraph = createStateGroup(stateInfo);
auto dx = info.dx;
auto dy = info.dy;
auto dz = info.dz;
auto origin = info.position - dx * 0.5f - dy * 0.5f - dz * 0.5f;
auto [t_origin, t_scale, t_top] = y_texcoord(stateInfo).value;
vec3 v000(origin);
vec3 v100(origin + dx);
vec3 v110(origin + dx + dy);
vec3 v010(origin + dy);
vec3 v001(origin + dz);
vec3 v101(origin + dx + dz);
vec3 v111(origin + dx + dy + dz);
vec3 v011(origin + dy + dz);
vec2 t00(0.0f, t_origin);
vec2 t01(0.0f, t_top);
vec2 t10(1.0f, t_origin);
vec2 t11(1.0f, t_top);
ref_ptr<vec3Array> vertices;
ref_ptr<vec3Array> normals;
ref_ptr<vec2Array> texcoords;
ref_ptr<ushortArray> indices;
if (stateInfo.wireframe)
{
vec3 n0 = normalize(v000 - v111);
vec3 n1 = normalize(v100 - v011);
vec3 n2 = normalize(v110 - v001);
vec3 n3 = normalize(v010 - v101);
vec3 n4 = -n2;
vec3 n5 = -n3;
vec3 n6 = -n0;
vec3 n7 = -n1;
// set up vertex and index arrays
vertices = vec3Array::create(
{v000, v100, v110, v010,
v001, v101, v111, v011});
normals = vec3Array::create(
{n0, n1, n2, n3,
n4, n5, n6, n7});
texcoords = vec2Array::create(
{t00, t10, t11, t01,
t00, t10, t11, t01});
indices = ushortArray::create(
{0, 1, 1, 2, 2, 3, 3, 0,
0, 4, 1, 5, 2, 6, 3, 7,
4, 5, 5, 6, 6, 7, 7, 4});
}
else
{
vec3 n0 = normalize(cross(dx, dz));
vec3 n1 = normalize(cross(dy, dz));
vec3 n2 = -n0;
vec3 n3 = -n1;
vec3 n4 = normalize(cross(dy, dx));
vec3 n5 = -n4;
// set up vertex and index arrays
vertices = vec3Array::create(
{v000, v100, v101, v001, // front
v100, v110, v111, v101, // right
v110, v010, v011, v111, // far
v010, v000, v001, v011, // left
v010, v110, v100, v000, // bottom
v001, v101, v111, v011}); // top
normals = vec3Array::create(
{n0, n0, n0, n0,
n1, n1, n1, n1,
n2, n2, n2, n2,
n3, n3, n3, n3,
n4, n4, n4, n4,
n5, n5, n5, n5});
texcoords = vec2Array::create(
{t00, t10, t11, t01,
t00, t10, t11, t01,
t00, t10, t11, t01,
t00, t10, t11, t01,
t00, t10, t11, t01,
t00, t10, t11, t01});
indices = ushortArray::create(
{0, 1, 2, 0, 2, 3,
4, 5, 6, 4, 6, 7,
8, 9, 10, 8, 10, 11,
12, 13, 14, 12, 14, 15,
16, 17, 18, 16, 18, 19,
20, 21, 22, 20, 22, 23});
}
if (info.transform != identity)
{
transform(info.transform, vertices, normals);
}
// setup geometry
auto vid = VertexIndexDraw::create();
DataList arrays;
arrays.push_back(vertices);
if (normals) arrays.push_back(normals);
if (texcoords) arrays.push_back(texcoords);
if (colors) arrays.push_back(colors);
if (positions) arrays.push_back(positions);
vid->assignArrays(arrays);
vid->assignIndices(indices);
vid->indexCount = static_cast<uint32_t>(indices->size());
vid->instanceCount = instanceCount;
scenegraph->addChild(vid);
if (compileTraversal) compileTraversal->compile(scenegraph);
subgraph = scenegraph;
return subgraph;
}
ref_ptr<Node> Builder::createCapsule(const GeometryInfo& info, const StateInfo& stateInfo)
{
auto& subgraph = _capsules[info];
if (subgraph)
{
return subgraph;
}
uint32_t instanceCount = 1;
auto positions = info.positions;
if (positions)
{
if (positions->size() >= 1)
instanceCount = static_cast<uint32_t>(positions->size());
else
positions = {};
}
auto colors = info.colors;
if (colors && colors->valueCount() != instanceCount) colors = {};
if (!colors) colors = vec4Array::create(instanceCount, info.color);
auto [t_origin, t_scale, t_top] = y_texcoord(stateInfo).value;
// create StateGroup as the root of the scene/command graph to hold the GraphicsProgram, and binding of Descriptors to decorate the whole graph
auto scenegraph = createStateGroup(stateInfo);
auto dx = info.dx * 0.5f;
auto dy = info.dy * 0.5f;
auto dz = info.dz * 0.5f;
auto bottom = info.position - dz;
auto top = info.position + dz;
bool withEnds = true;
unsigned int num_columns = 20;
unsigned int num_rows = 6;
unsigned int num_vertices = num_columns * 2;
unsigned int num_indices = (num_columns - 1) * 6;
if (withEnds)
{
num_vertices += num_columns * num_rows * 2;
num_indices += (num_columns - 1) * (num_rows - 1) * 6 * 2;
}
auto vertices = vec3Array::create(num_vertices);
auto normals = vec3Array::create(num_vertices);
auto texcoords = vec2Array::create(num_vertices);
auto indices = ushortArray::create(num_indices);
vec3 v = dy;
vec3 n = normalize(dy);
vertices->set(0, bottom + v);
normals->set(0, n);
texcoords->set(0, vec2(0.0, t_origin));
vertices->set(num_columns * 2 - 2, bottom + v);
normals->set(num_columns * 2 - 2, n);
texcoords->set(num_columns * 2 - 2, vec2(1.0, t_origin));
vertices->set(1, top + v);
normals->set(1, n);
texcoords->set(1, vec2(0.0, t_top));
vertices->set(num_columns * 2 - 1, top + v);
normals->set(num_columns * 2 - 1, n);
texcoords->set(num_columns * 2 - 1, vec2(1.0, t_top));
for (unsigned int c = 1; c < num_columns - 1; ++c)
{
unsigned int vi = c * 2;
float r = float(c) / float(num_columns - 1);
float alpha = (r)*2.0f * PIf;
v = dx * (-sinf(alpha)) + dy * (cosf(alpha));
n = normalize(v);
vertices->set(vi, bottom + v);
normals->set(vi, n);
texcoords->set(vi, vec2(r, t_origin));
vertices->set(vi + 1, top + v);
normals->set(vi + 1, n);
texcoords->set(vi + 1, vec2(r, t_top));
}
unsigned int i = 0;
for (unsigned int c = 0; c < num_columns - 1; ++c)
{
unsigned lower = c * 2;
unsigned upper = lower + 1;
indices->set(i++, lower);
indices->set(i++, lower + 2);
indices->set(i++, upper);
indices->set(i++, upper);
indices->set(i++, lower + 2);
indices->set(i++, upper + 2);
}
if (withEnds)
{
unsigned int base_vi = num_columns * 2;
// bottom
{
for (unsigned int r = 0; r < num_rows; ++r)
{
float beta = ((float(r) / float(num_rows - 1)) - 1.0f) * PIf * 0.5f;
float ty = t_origin + t_scale * float(r) / float(num_rows - 1);
float cos_beta = cosf(beta);
vec3 dz_sin_beta = dz * sinf(beta);
v = dy * cos_beta + dz_sin_beta;
n = normalize(v);
unsigned int left_i = base_vi + r * num_columns;
vertices->set(left_i, bottom + v);
normals->set(left_i, n);
texcoords->set(left_i, vec2(0.0f, ty));
unsigned int right_i = left_i + num_columns - 1;
vertices->set(right_i, bottom + v);
normals->set(right_i, n);
texcoords->set(right_i, vec2(1.0f, ty));
for (unsigned int c = 1; c < num_columns - 1; ++c)
{
unsigned int vi = left_i + c;
float alpha = (float(c) / float(num_columns - 1)) * 2.0f * PIf;
v = dx * (-sinf(alpha) * cos_beta) + dy * (cosf(alpha) * cos_beta) + dz_sin_beta;
n = normalize(v);
vertices->set(vi, bottom + v);
normals->set(vi, n);
texcoords->set(vi, vec2(float(c) / float(num_columns - 1), ty));
}
}
for (unsigned int r = 0; r < num_rows - 1; ++r)
{
for (unsigned int c = 0; c < num_columns - 1; ++c)
{
unsigned lower = base_vi + num_columns * r + c;
unsigned upper = lower + num_columns;
indices->set(i++, lower);
indices->set(i++, lower + 1);
indices->set(i++, upper);
indices->set(i++, upper);
indices->set(i++, lower + 1);
indices->set(i++, upper + 1);
}
}
base_vi += num_columns * num_rows;
}
// top
{
for (unsigned int r = 0; r < num_rows; ++r)
{
float beta = ((float(r) / float(num_rows - 1))) * PIf * 0.5f;
float ty = t_origin + t_scale * float(r) / float(num_rows - 1);
float cos_beta = cosf(beta);
vec3 dz_sin_beta = dz * sinf(beta);
v = dy * cos_beta + dz_sin_beta;
n = normalize(v);
unsigned int left_i = base_vi + r * num_columns;
vertices->set(left_i, top + v);
normals->set(left_i, n);
texcoords->set(left_i, vec2(0.0f, ty));
unsigned int right_i = left_i + num_columns - 1;
vertices->set(right_i, top + v);
normals->set(right_i, n);
texcoords->set(right_i, vec2(1.0f, ty));
for (unsigned int c = 1; c < num_columns - 1; ++c)
{
unsigned int vi = left_i + c;
float alpha = (float(c) / float(num_columns - 1)) * 2.0f * PIf;
v = dx * (-sinf(alpha) * cos_beta) + dy * (cosf(alpha) * cos_beta) + dz_sin_beta;
n = normalize(v);
vertices->set(vi, top + v);
normals->set(vi, n);
texcoords->set(vi, vec2(float(c) / float(num_columns - 1), ty));
}
}
for (unsigned int r = 0; r < num_rows - 1; ++r)
{
for (unsigned int c = 0; c < num_columns - 1; ++c)
{
unsigned lower = base_vi + num_columns * r + c;
unsigned upper = lower + num_columns;
indices->set(i++, lower);
indices->set(i++, lower + 1);
indices->set(i++, upper);
indices->set(i++, upper);
indices->set(i++, lower + 1);
indices->set(i++, upper + 1);
}
}
}
}
if (info.transform != identity)
{
transform(info.transform, vertices, normals);
}
// setup geometry
auto vid = VertexIndexDraw::create();
DataList arrays;
arrays.push_back(vertices);
if (normals) arrays.push_back(normals);
if (texcoords) arrays.push_back(texcoords);
if (colors) arrays.push_back(colors);
if (positions) arrays.push_back(positions);
vid->assignArrays(arrays);
vid->assignIndices(indices);
vid->indexCount = static_cast<uint32_t>(indices->size());
vid->instanceCount = instanceCount;
scenegraph->addChild(vid);
if (compileTraversal) compileTraversal->compile(scenegraph);
subgraph = scenegraph;
return subgraph;
}
ref_ptr<Node> Builder::createCone(const GeometryInfo& info, const StateInfo& stateInfo)
{
auto& subgraph = _cones[info];
if (subgraph)
{
return subgraph;
}
uint32_t instanceCount = 1;
auto positions = info.positions;
if (positions)
{
if (positions->size() >= 1)
instanceCount = static_cast<uint32_t>(positions->size());
else
positions = {};
}
auto colors = info.colors;
if (colors && colors->valueCount() != instanceCount) colors = {};
if (!colors) colors = vec4Array::create(instanceCount, info.color);
auto [t_origin, t_scale, t_top] = y_texcoord(stateInfo).value;
// create StateGroup as the root of the scene/command graph to hold the GraphicsProgram, and binding of Descriptors to decorate the whole graph
auto scenegraph = createStateGroup(stateInfo);
auto dx = info.dx * 0.5f;
auto dy = info.dy * 0.5f;
auto dz = info.dz * 0.5f;
auto bottom = info.position - dz;
auto top = info.position + dz;
ref_ptr<vec3Array> vertices;
ref_ptr<vec3Array> normals;
ref_ptr<vec2Array> texcoords;
ref_ptr<ushortArray> indices;
auto edge = [&](float alpha) -> vec3 {
return dy * (cosf(alpha)) - dx * (sinf(alpha));
};
auto normal = [&](float alpha) -> vec3 {
float delta = 0.001f;
vec3 before = edge(alpha - delta);
vec3 mid = edge(alpha);
vec3 after = edge(alpha + delta);
return normalize(cross(after - before, dz - mid));
};
float alpha = 0.0f;
vec3 v = edge(alpha);
vec3 n = normal(alpha);
if (stateInfo.wireframe)
{
unsigned int num_columns = 20;
unsigned int num_vertices = 1 + num_columns;
unsigned int num_indices = num_columns * 4;
vertices = vec3Array::create(num_vertices);
normals = vec3Array::create(num_vertices);
texcoords = vec2Array::create(num_vertices);
indices = ushortArray::create(num_indices);
vertices->set(0, top);
normals->set(0, normalize(info.dz));
texcoords->set(0, vec2(0.0, 0.0));
for (unsigned int c = 0; c < num_columns; ++c)
{
unsigned int vi = 1 + c;
float r = float(c) / float(num_columns);
alpha = (r)*2.0f * PIf;
v = edge(alpha);
n = normal(alpha);
vertices->set(vi, bottom + v);
normals->set(vi, n);
texcoords->set(vi, vec2(r, t_origin));
}
unsigned int i = 0;
indices->set(i++, 0);
indices->set(i++, num_columns);
indices->set(i++, num_columns);
indices->set(i++, 1);
for (unsigned int c = 1; c < num_columns; ++c)
{
unsigned lower = 1 + c;
indices->set(i++, 0);
indices->set(i++, lower - 1);
indices->set(i++, lower - 1);
indices->set(i++, lower);
}
}
else
{
bool withEnds = true;
unsigned int num_columns = 20;
unsigned int num_vertices = num_columns * 2;
unsigned int num_indices = (num_columns - 1) * 3;
if (withEnds)
{
num_vertices += num_columns;
num_indices += (num_columns - 2) * 3;
}
vertices = vec3Array::create(num_vertices);
normals = vec3Array::create(num_vertices);
texcoords = vec2Array::create(num_vertices);
indices = ushortArray::create(num_indices);
vertices->set(0, bottom + v);
normals->set(0, n);
texcoords->set(0, vec2(0.0, t_origin));
vertices->set(num_columns * 2 - 2, bottom + v);
normals->set(num_columns * 2 - 2, n);
texcoords->set(num_columns * 2 - 2, vec2(1.0, t_origin));
vertices->set(1, top);
normals->set(1, n);
texcoords->set(1, vec2(0.0, t_top));
vertices->set(num_columns * 2 - 1, top);
normals->set(num_columns * 2 - 1, n);
texcoords->set(num_columns * 2 - 1, vec2(1.0, t_top));
for (unsigned int c = 1; c < num_columns - 1; ++c)
{
unsigned int vi = c * 2;
float r = float(c) / float(num_columns - 1);
alpha = (r)*2.0f * PIf;
v = edge(alpha);
n = normal(alpha);
vertices->set(vi, bottom + v);
normals->set(vi, n);
texcoords->set(vi, vec2(r, t_origin));
vertices->set(vi + 1, top);
normals->set(vi + 1, n);
texcoords->set(vi + 1, vec2(r, t_top));
}
unsigned int i = 0;
for (unsigned int c = 0; c < num_columns - 1; ++c)
{
unsigned lower = c * 2;
unsigned upper = lower + 1;
indices->set(i++, lower);
indices->set(i++, lower + 2);
indices->set(i++, upper);
}
if (withEnds)
{
unsigned int bottom_i = num_columns * 2;
v = edge(0.0f);
vec3 bottom_n = normalize(-dz);
vertices->set(bottom_i, bottom + v);
normals->set(bottom_i, bottom_n);
texcoords->set(bottom_i, vec2(0.0, t_origin));
vertices->set(bottom_i + num_columns - 1, bottom + v);
normals->set(bottom_i + num_columns - 1, bottom_n);
texcoords->set(bottom_i + num_columns - 1, vec2(1.0, t_origin));
for (unsigned int c = 1; c < num_columns - 1; ++c)
{
float r = float(c) / float(num_columns - 1);
alpha = (r)*2.0f * PIf;
v = edge(alpha);
unsigned int vi = bottom_i + c;
vertices->set(vi, bottom + v);
normals->set(vi, bottom_n);
texcoords->set(vi, vec2(r, t_origin));
}
for (unsigned int c = 0; c < num_columns - 2; ++c)
{
indices->set(i++, bottom_i + c);
indices->set(i++, bottom_i + num_columns - 1);
indices->set(i++, bottom_i + c + 1);
}
}
}
if (info.transform != identity)
{
transform(info.transform, vertices, normals);
}
// setup geometry
auto vid = VertexIndexDraw::create();
DataList arrays;
arrays.push_back(vertices);
if (normals) arrays.push_back(normals);
if (texcoords) arrays.push_back(texcoords);
if (colors) arrays.push_back(colors);
if (positions) arrays.push_back(positions);
vid->assignArrays(arrays);
vid->assignIndices(indices);
vid->indexCount = static_cast<uint32_t>(indices->size());
vid->instanceCount = instanceCount;
scenegraph->addChild(vid);
if (compileTraversal) compileTraversal->compile(scenegraph);
subgraph = scenegraph;
return subgraph;
}
ref_ptr<Node> Builder::createCylinder(const GeometryInfo& info, const StateInfo& stateInfo)
{
auto& subgraph = _cylinders[info];
if (subgraph)
{
return subgraph;
}
uint32_t instanceCount = 1;
auto positions = info.positions;
if (positions)
{
if (positions->size() >= 1)
instanceCount = static_cast<uint32_t>(positions->size());
else
positions = {};
}
auto colors = info.colors;
if (colors && colors->valueCount() != instanceCount) colors = {};
if (!colors) colors = vec4Array::create(instanceCount, info.color);
auto [t_origin, t_scale, t_top] = y_texcoord(stateInfo).value;
// create StateGroup as the root of the scene/command graph to hold the GraphicsProgram, and binding of Descriptors to decorate the whole graph
auto scenegraph = createStateGroup(stateInfo);
auto dx = info.dx * 0.5f;
auto dy = info.dy * 0.5f;
auto dz = info.dz * 0.5f;
auto bottom = info.position - dz;
auto top = info.position + dz;
ref_ptr<vec3Array> vertices;
ref_ptr<vec3Array> normals;
ref_ptr<vec2Array> texcoords;
ref_ptr<ushortArray> indices;
if (stateInfo.wireframe)
{
unsigned int num_columns = 20;
unsigned int num_vertices = num_columns * 2;
unsigned int num_indices = num_columns * 6;
vertices = vec3Array::create(num_vertices);
normals = vec3Array::create(num_vertices);
texcoords = vec2Array::create(num_vertices);
indices = ushortArray::create(num_indices);
vec3 v = dy;
vec3 n = normalize(dy);
vertices->set(0, bottom + v);
normals->set(0, n);
texcoords->set(0, vec2(0.0, t_origin));
vertices->set(1, top + v);
normals->set(1, n);
texcoords->set(1, vec2(0.0, t_top));
for (unsigned int c = 1; c < num_columns; ++c)
{
unsigned int vi = c * 2;
float r = float(c) / float(num_columns - 1);
float alpha = (r)*2.0f * PIf;
v = dx * (-sinf(alpha)) + dy * (cosf(alpha));
n = normalize(v);
vertices->set(vi, bottom + v);
normals->set(vi, n);
texcoords->set(vi, vec2(r, t_origin));
vertices->set(vi + 1, top + v);
normals->set(vi + 1, n);
texcoords->set(vi + 1, vec2(r, t_top));
}
unsigned int i = 0;
unsigned int lower = (num_columns - 1) * 2;
unsigned int upper = lower + 1;
indices->set(i++, 0);
indices->set(i++, lower);
indices->set(i++, lower);
indices->set(i++, upper);
indices->set(i++, upper);
indices->set(i++, 1);
for (unsigned int c = 0; c < num_columns - 1; ++c)
{
lower = c * 2;
upper = lower + 1;
indices->set(i++, lower + 2);
indices->set(i++, lower);
indices->set(i++, lower);
indices->set(i++, upper);
indices->set(i++, upper);
indices->set(i++, upper + 2);
}
}
else
{
bool withEnds = true;
unsigned int num_columns = 20;
unsigned int num_vertices = num_columns * 2;
unsigned int num_indices = (num_columns - 1) * 6;
if (withEnds)
{
num_vertices += num_columns * 2;
num_indices += (num_columns - 2) * 6;
}
vertices = vec3Array::create(num_vertices);
normals = vec3Array::create(num_vertices);
texcoords = vec2Array::create(num_vertices);
indices = ushortArray::create(num_indices);
vec3 v = dy;
vec3 n = normalize(dy);
vertices->set(0, bottom + v);
normals->set(0, n);
texcoords->set(0, vec2(0.0, t_origin));
vertices->set(num_columns * 2 - 2, bottom + v);
normals->set(num_columns * 2 - 2, n);
texcoords->set(num_columns * 2 - 2, vec2(1.0, t_origin));
vertices->set(1, top + v);
normals->set(1, n);
texcoords->set(1, vec2(0.0, t_top));
vertices->set(num_columns * 2 - 1, top + v);
normals->set(num_columns * 2 - 1, n);
texcoords->set(num_columns * 2 - 1, vec2(1.0, t_top));
for (unsigned int c = 1; c < num_columns - 1; ++c)
{
unsigned int vi = c * 2;
float r = float(c) / float(num_columns - 1);
float alpha = (r)*2.0f * PIf;
v = dx * (-sinf(alpha)) + dy * (cosf(alpha));
n = normalize(v);
vertices->set(vi, bottom + v);
normals->set(vi, n);
texcoords->set(vi, vec2(r, t_origin));
vertices->set(vi + 1, top + v);
normals->set(vi + 1, n);
texcoords->set(vi + 1, vec2(r, t_top));
}
unsigned int i = 0;
for (unsigned int c = 0; c < num_columns - 1; ++c)
{
unsigned lower = c * 2;
unsigned upper = lower + 1;
indices->set(i++, lower);
indices->set(i++, lower + 2);
indices->set(i++, upper);
indices->set(i++, upper);
indices->set(i++, lower + 2);
indices->set(i++, upper + 2);
}
if (withEnds)
{
v = dy;
unsigned int bottom_i = num_columns * 2;
unsigned int top_i = bottom_i + num_columns;
vec3 top_n = normalize(dz);
vec3 bottom_n = -top_n;
vertices->set(bottom_i, bottom + v);
normals->set(bottom_i, bottom_n);
texcoords->set(bottom_i, vec2(0.0, t_origin));
vertices->set(bottom_i + num_columns - 1, bottom + v);
normals->set(bottom_i + num_columns - 1, bottom_n);
texcoords->set(bottom_i + num_columns - 1, vec2(1.0, t_origin));
vertices->set(top_i, top + v);
normals->set(top_i, top_n);
texcoords->set(top_i, vec2(0.0, t_top));
vertices->set(top_i + num_columns - 1, top + v);
normals->set(top_i + num_columns - 1, top_n);
texcoords->set(top_i + num_columns - 1, vec2(0.0, t_top));
for (unsigned int c = 1; c < num_columns - 1; ++c)
{
float r = float(c) / float(num_columns - 1);
float alpha = (r)*2.0f * PIf;
v = dx * (-sinf(alpha)) + dy * (cosf(alpha));
n = normalize(v);
unsigned int vi = bottom_i + c;
vertices->set(vi, bottom + v);
normals->set(vi, bottom_n);
texcoords->set(vi, vec2(r, t_origin));