This function calculates binormals and tangets for an entire surface. These are needed for normal mapping to appear correctly.

Syntax

• bool UpdateTangentsAndBinormals()

Returns

Returns true if the routine is able to successfully calculate binormals and tangets, otherwise false is returned.

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,-4);
        Light* light = DirectionalLight::Create();
        light->SetRotation(35,35,0);
        
        //Create a model from scratch
        Model* model = Model::Create();
        Surface* surface = model->AddSurface();
        surface->AddVertex(-0.5,-0.5,0, 0,0,-1);
        surface->AddVertex(0.5,-0.5,0, 0,0,-1);
        surface->AddVertex(0.5,0.5,0, 0,0,-1);
        surface->AddVertex(-0.5,0.5,0, 0,0,-1);
        surface->AddTriangle(2,1,0);
        surface->AddTriangle(0,3,2);
    
        //Update the vertex tangents and binormals so normal mapping appears correctly
        surface->UpdateTangentsAndBinormals();

        model->UpdateAABB(Entity::LocalAABB|Entity::GlobalAABB);

        //Load a material and apply it
        Material*  material = Material::Load("Materials/Concrete/concrete_dirty.mat");
        model->SetMaterial(material);
        material->Release();
        while (true)
        {
            if (window->Closed() || window->KeyDown(Key::Escape)) return false;
            
            Leadwerks::Time::Update();
            world->Update();
            world->Render();
            context->Sync();
        }
        return 0;
}