void generateStars(float side, int star_count)
{
// simple effect to render a star billboard
vl::ref<vl::Effect> effect = new vl::Effect;
// speedup tip: this allows VL to batch all the stars together greatly speeding up the rendering and avoiding switching textures back and forth with the trees.
effect->setRenderRank(1);
effect->shader()->enable(vl::EN_BLEND);
effect->shader()->enable(vl::EN_DEPTH_TEST);
effect->shader()->gocTextureSampler(0)->setTexture( new vl::Texture("images/sun.png", vl::TF_RGBA, true) );
vl::ref<vl::Geometry> star = generateQuad();
for(int i=0; i<star_count; i++)
{
// new billboard
vl::ref<vl::Billboard> billboard = new vl::Billboard;
// set spherical billboard type: orient the object always towards the camera.
billboard->setType(vl::BT_SphericalBillboard);
// add billboard to the transform tree
rendering()->as<vl::Rendering>()->transform()->addChild(billboard.get());
// compute a random point on the skydome
vl::real x = vl::random(-1.0f,+1.0f);
vl::real y = vl::random(0,2.0f);
vl::real z = vl::random(-1.0f,+1.0f);
vl::vec3 n(x,y,z);
n.normalize();
n = n * sqrt(side*side/2.0f);
n.y() *= 0.2f;
// set the billboard position and rotation center.
billboard->setPosition( n );
// add the star actor
sceneManager()->tree()->addActor(star.get(), effect.get(), billboard.get());
}
}
void prepare()
{
VulkanExampleBase::prepare();
setupVertexDescriptions();
loadTextures();
generateQuad();
prepareUniformBuffers();
setupDescriptorSetLayout();
preparePipelines();
setupDescriptorPool();
setupDescriptorSet();
buildCommandBuffers();
prepared = true;
}
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
}
void prepare()
{
VulkanExampleBase::prepare();
generateQuad();
loadMeshes();
setupVertexDescriptions();
prepareUniformBuffers();
prepareTextureTarget(TEX_DIM, TEX_DIM, DEPTH_FORMAT);
setupDescriptorSetLayout();
preparePipelines();
setupDescriptorPool();
setupDescriptorSets();
prepareOffscreenFramebuffer();
void generateTrees(float side, int tree_count)
{
// simple effect to render a tree billboard
vl::ref<vl::Effect> effect = new vl::Effect;
// speedup tip: this allows VL to batch all the trees together greatly speeding up the rendering and avoiding switching textures back and forth with the stars.
effect->setRenderRank(2);
effect->shader()->setRenderState( new vl::Light, 0 );
effect->shader()->enable(vl::EN_BLEND);
effect->shader()->enable(vl::EN_DEPTH_TEST);
effect->shader()->gocDepthMask()->set(false);
effect->shader()->enable(vl::EN_LIGHTING);
effect->shader()->gocLight(0)->setLinearAttenuation(0.025f);
effect->shader()->gocTextureSampler(0)->setTexture( new vl::Texture("images/tree.png") );
vl::ref<vl::Geometry> tree = generateQuad();
tree->transform( vl::mat4::getTranslation(0,+0.5f,0) );
tree->transform( vl::mat4::getScaling(1.0f,+2.0f,1.0f) );
tree->computeNormals();
for(int i=0; i<tree_count; i++)
{
// new billboard
vl::ref<vl::Billboard> billboard = new vl::Billboard;
// set axis-aligned billboard type: rotate the billboard towards the camera but only around the specified axis.
billboard->setType(vl::BT_AxisAlignedBillboard);
billboard->setAxis(vl::vec3(0,1.0f,0));
// bind billboard to the transform tree
rendering()->as<vl::Rendering>()->transform()->addChild(billboard.get());
// generate a random position
vl::real x = vl::random(-side/2.0f,+side/2.0f);
vl::real y = 0;
vl::real z = vl::random(-side/2.0f,+side/2.0f);
billboard->setPosition( vl::vec3(x,y,z) );
// add the tree actor
sceneManager()->tree()->addActor(tree.get(), effect.get(), billboard.get());
}
}
