This function returns the number of alpha control points that are currently set.

Syntax

• int CountAlphaControlPoints()

Returns

The number of alpha control points.

Example

#include "Leadwerks.h"

using namespace Leadwerks;

int main(int argc, const char *argv[])
{
    Leadwerks::Window* window = Leadwerks::Window::Create();
    Context* context = Context::Create(window);
    World* world = World::Create();
    Camera* camera = Camera::Create();
    camera->SetRotation(35, 0, 0);
    camera->Move(0, 0, -3);
    Light* light = DirectionalLight::Create();
    light->SetRotation(35, 35, 0);
    
    //Create an emitter
    Emitter* emitter = Emitter::Create(100);

    emitter->ClearAlphaControlPoints();//Remove default control points

    emitter->AddAlphaControlPoint(0, 0); //at spawn the particle will have an alpha of 0 (fully transparent)
    emitter->AddAlphaControlPoint(.5, 1); //halfway through the particle's lifetime alpha will be 1 (ie not transparent)
    emitter->AddAlphaControlPoint(1, 0); //at death the particle will be fully transparent

    while (true)
    {
        if (window->Closed() || window->KeyDown(Key::Escape)) return false;

        Leadwerks::Leadwerks::Time::Update();
        world->Update();
        world->Render();

        context->SetBlendMode(Blend::Alpha);
        context->DrawText("number of alpha control points: " + String(emitter->CountAlphaControlPoints()), 2, 2);
        context->SetBlendMode(Blend::Solid);

        context->Sync();
    }
}