Node::Ptr
createTransparentObject(float scale, float rotationY, file::AssetLibrary::Ptr assets)
{
assert(assets);
assert(NUM_OBJECTS > 0);
auto randomAxis = Vector3::create((float)rand(), (float)rand(), (float)rand())->normalize();
const float randomAng = 2.0f * (float)PI * rand() / (float)RAND_MAX;
return scene::Node::create()
->addComponent(Transform::create(
Matrix4x4::create()
->appendRotation(randomAng, randomAxis)
->appendScale(scale)
->appendTranslation(1.0f)
->appendRotationY(rotationY)
))
->addComponent(Surface::create(
assets->geometry("cube"),
material::BasicMaterial::create()
->diffuseColor(Color::hslaToRgba(0.5f * rotationY / (float)PI, 1.0f, 0.5f, 0.5f))
->isTransparent(true, true)
->triangleCulling(render::TriangleCulling::BACK),
assets->effect("effect/Basic.effect")
));
}
void
addStar(Node::Ptr root, file::AssetLibrary::Ptr assets, std::vector<Star>& stars)
{
const unsigned int MAX_NUM_STARS = 20;
if (stars.size() == MAX_NUM_STARS)
{
std::cerr << "cannot add more stars." << std::endl;
return;
}
unsigned int numBranches = 4 + rand() % 4;
float outRadius = 0.9f + 0.2f * (rand() / float(RAND_MAX) - 0.5f);
float inRadius = outRadius * (0.5f + 0.1f * (rand() / float(RAND_MAX) - 0.5f));
auto starNode = Node::create("star_" + std::to_string(stars.size()))
->addComponent(Surface::create(
createStarLineGeometry(numBranches, inRadius, outRadius, assets->context()),
material::Material::create("material")
->set("diffuseColor", Color::hslaToRgba(rand() / float(RAND_MAX), 0.75f, 0.6f, 1.0f))
->set("lineThickness", 1.0f + 3.0f * (rand() / float(RAND_MAX))),
assets->effect("line")
))
->addComponent(Transform::create(Matrix4x4::create()->appendRotationZ(2.0f * float(M_PI) * rand() / (float) RAND_MAX)));
stars.push_back(Star());
stars.back().node = starNode;
stars.back().angRate = 0.01f + 0.05f * (rand() / float(RAND_MAX));
root->addChild(stars.back().node);
}
Node::Ptr
createPhysicsObject(unsigned int id, file::AssetLibrary::Ptr assets, bool isCube)
{
const float mass = MIN_MASS + (rand() / (float)RAND_MAX) * (MAX_MASS - MIN_MASS);
const float size = MIN_SCALE + (rand() / (float)RAND_MAX) * (MAX_SCALE - MIN_SCALE);
const float startX = MIN_DROP_POS->x() + (rand() / (float)RAND_MAX) * (MAX_DROP_POS->x() - MIN_DROP_POS->x());
const float startY = MIN_DROP_POS->y() + (rand() / (float)RAND_MAX) * (MAX_DROP_POS->y() - MIN_DROP_POS->y());
const float startZ = MIN_DROP_POS->z() + (rand() / (float)RAND_MAX) * (MAX_DROP_POS->z() - MIN_DROP_POS->z());
const float halfSize = 0.5f * size;
const float hue = (id % 10) * 0.1f;
auto diffColor = Color::hslaToRgba(hue, 1.0f, 0.5f, 1.0f);
auto specColor = Color::hslaToRgba(hue, 1.0f, 0.8f, 1.0f);
const float shininess = 2.0f * (rand() / (float)RAND_MAX) * 6.0f;
bullet::Collider::Ptr collider = nullptr;
if (isCube)
{
auto boxColliderData = bullet::ColliderData::create(
mass,
bullet::BoxShape::create(halfSize, halfSize, halfSize)
);
collider = bullet::Collider::create(boxColliderData);
}
else
{
auto sphColliderData = bullet::ColliderData::create(
mass,
bullet::SphereShape::create(halfSize)
);
collider = bullet::Collider::create(sphColliderData);
}
return scene::Node::create("node_" + std::to_string(id))
->addComponent(Transform::create(
Matrix4x4::create()
->appendScale(size)
->appendTranslation(startX, startY, startZ)
))
->addComponent(Surface::create(
assets->geometry(isCube ? "cube" : "sphere"),
material::PhongMaterial::create()
->specularColor(specColor)
->shininess(shininess)
->diffuseColor(diffColor),
assets->effect("phong")
))
->addComponent(collider);
}
void
generateStars(unsigned int numStars,
file::AssetLibrary::Ptr assets,
std::vector<Node::Ptr>& starNodes)
{
if (assets == nullptr)
throw std::invalid_argument("assets");
starNodes.clear();
starNodes.resize(numStars, nullptr);
for (unsigned int i = 0; i < numStars; ++i)
{
starNodes[i] = Node::create("star_" + std::to_string(i))
->addComponent(Transform::create())
->addComponent(Surface::create(
assets->geometry("smallStar"),
Material::create()
->set("diffuseColor", generateColor())
->set("colorMask", true)
->set("depthMask", false)
->set("depthFunc", CompareMode::ALWAYS)
->set("stencilFunc", CompareMode::EQUAL)
->set("stencilRef", 1)
->set("stencilMask", (unsigned int)0xff)
->set("stencilFailOp", StencilOperation::KEEP),
assets->effect("basic")
));
const float minX = -1.0f;
const float rangeX = 1.0f - minX;
const float minY = -1.0f;
const float rangeY = 1.0f - minY;
starNodes[i]->component<Transform>()->matrix()
->appendScale(0.25f, 0.25f, 0.25f)
->appendRotationZ(2.0f * (float)PI * (rand() / (float)RAND_MAX))
->appendTranslation(
minX + (rand() / (float)RAND_MAX)*rangeX,
minY + (rand() / (float)RAND_MAX)*rangeY,
0.0f
);
}
}