static Mesh* createPointsMesh()
{
float scale = 0.2f;
unsigned int vertexCount = 100;
std::vector<float> vertices;
vertices.reserve(vertexCount * 6);
for (unsigned int i = 0; i < vertexCount; ++i)
{
// x, y, z, r, g, b
vertices.push_back(MATH_RANDOM_MINUS1_1() * scale);
vertices.push_back(MATH_RANDOM_MINUS1_1() * scale);
vertices.push_back(MATH_RANDOM_MINUS1_1() * scale);
vertices.push_back(MATH_RANDOM_0_1());
vertices.push_back(MATH_RANDOM_0_1());
vertices.push_back(MATH_RANDOM_0_1());
}
VertexFormat::Element elements[] =
{
VertexFormat::Element(VertexFormat::POSITION, 3),
VertexFormat::Element(VertexFormat::COLOR, 3)
};
Mesh* mesh = Mesh::createMesh(VertexFormat(elements, 2), vertexCount, false);
if (mesh == NULL)
{
GP_ERROR("Failed to create mesh.");
return NULL;
}
mesh->setPrimitiveType(Mesh::POINTS);
mesh->setVertexData(&vertices[0], 0, vertexCount);
return mesh;
}
void BillboardSample::loadBillboards()
{
Mesh* mesh = Mesh::createQuad(-(BILLBOARD_WIDTH / 2.0f), -(BILLBOARD_HEIGHT / 2.0f), BILLBOARD_WIDTH, BILLBOARD_HEIGHT);
mesh->setBoundingSphere(BoundingSphere(Vector3::zero(), BILLBOARD_HEIGHT));
Effect* effect = Effect::createFromFile("res/shaders/textured.vert", "res/shaders/textured.frag", "TEXTURE_DISCARD_ALPHA");
// Create the model and node and bind the material
for ( unsigned int i = 0; i < BILLBOARD_COUNT; i++ )
{
Node* node = Node::create();
Model* model = Model::create(mesh);
node->setDrawable(model);
_scene->addNode(node);
Material* material = Material::create(effect);
material->getStateBlock()->setDepthTest(true);
material->getStateBlock()->setBlend(false);
material->getParameter("u_diffuseTexture")->setValue("res/png/grass.png" , true);
material->setParameterAutoBinding("u_worldViewProjectionMatrix", RenderState::WORLD_VIEW_PROJECTION_MATRIX);
model->setMaterial(material);
SAFE_RELEASE(model);
SAFE_RELEASE(material);
// Randomly postiion within the domain
float tx = MATH_RANDOM_0_1() * GROUND_WIDTH - (GROUND_WIDTH / 2.0f);
float tz = MATH_RANDOM_0_1() * GROUND_HEIGHT - (GROUND_HEIGHT / 2.0f);
node->translate(tx, (BILLBOARD_HEIGHT / 2.0f), tz);
_billboards.push_back(node);
}
SAFE_RELEASE(effect);
SAFE_RELEASE(mesh);
}
static Mesh* createTriangleStripMesh()
{
float scale = 0.02f;
unsigned int vertexCount = 20;
std::vector<float> vertices;
vertices.reserve(vertexCount * 6);
float x = -0.2f;
float y = -0.05f;
float step = fabs(x) * 2.0f / (float)vertexCount;
for (unsigned int i = 0; i < vertexCount; ++i)
{
// x, y, z, r, g, b
vertices.push_back(x);
vertices.push_back(y + MATH_RANDOM_MINUS1_1() * scale);
vertices.push_back(MATH_RANDOM_MINUS1_1() * scale * 2);
vertices.push_back(MATH_RANDOM_0_1());
vertices.push_back(MATH_RANDOM_0_1());
vertices.push_back(MATH_RANDOM_0_1());
x += step;
y *= -1.0f;
}
VertexFormat::Element elements[] =
{
VertexFormat::Element(VertexFormat::POSITION, 3),
VertexFormat::Element(VertexFormat::COLOR, 3)
};
Mesh* mesh = Mesh::createMesh(VertexFormat(elements, 2), vertexCount, false);
if (mesh == NULL)
{
GP_ERROR("Failed to create mesh.");
return NULL;
}
mesh->setPrimitiveType(Mesh::TRIANGLE_STRIP);
//
mesh->setVertexData(&vertices[0], 0, vertexCount);
return mesh;
}
void PostProcessSample::update(float elapsedTime)
{
_modelNode->rotateY(elapsedTime * MATH_DEG_TO_RAD(0.25f));
// Only the last sample will check live updating of material parameters
if (_compositorIndex == _compositors.size() - 1)
{
Compositor* compositor = _compositors[_compositorIndex];
MaterialParameter* elapsedParam = compositor->getMaterial()->getParameter("u_elapsedTime");
if (elapsedParam)
elapsedParam->setValue(elapsedTime);
MaterialParameter* randomParam = compositor->getMaterial()->getParameter("u_random");
if (randomParam)
randomParam->setValue(MATH_RANDOM_0_1());
}
}
float ParticleEmitter::generateScalar(float min, float max)
{
return min + (max - min) * MATH_RANDOM_0_1();
}
