SetMaterial with Manually Created Models/Surfaces

[jasonwkeith]

I am working my way through some of the sample code and making slight modifications. I am stuck with a very simple problem. I cannot manage to get a model to successfully render a texture.

 

I am using slightly modified code from the leadwerks docs and a stock material.

 

Any insight to my challenged code/thought process is appreciated.

 

#include "App.h"

using namespace Leadwerks;

App::App() : window(NULL), context(NULL), world(NULL), camera(NULL) {}

App::~App() { delete world; delete window; }

bool App::Start()
{
window = Window::Create();
context = Context::Create(window);
world = World::Create();
camera = Camera::Create();
camera->SetRotation(5, 0, 0);
camera->Move(0, 0, -6);
Light* light = DirectionalLight::Create();
light->SetRotation(35, 35, 0);

Model* model = NULL;

model = Model::Create();
model->SetColor(1.0, 0.0, 1.0);
model->SetPosition(0, 0, 0);

material = Material::Load("Materials/Concrete/concrete_dirty.mat");


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);
surface->UpdateAABB();

model->SetMaterial(material,1);
model->UpdateAABB(Entity::LocalAABB | Entity::GlobalAABB);

return true;
}

bool App::Loop()
{
if (window->Closed() || window->KeyDown(Key::Escape)) return false;

Time::Update();
world->Update();
world->Render();
context->Sync();

return true;
}

[macklebee]

i think you need to perform an update on the surface...

 

http://www.leadwerks.com/werkspace/page/documentation/_/command-reference/surface/surfaceupdate-r638

 

EDIT - actually that works just fine for me in lua... all except for the SetMaterial command. The second argument is bool not integer and will cause an error.

[shadmar]

Add the UV map (last two)

 

   surface->AddVertex(-0.5, -0.5, 0, 0, 0, -1,  -1,-1);
   surface->AddVertex(0.5, -0.5, 0, 0, 0, -1,  1,-1);
   surface->AddVertex(0.5, 0.5, 0, 0, 0, -1,   1,1);
   surface->AddVertex(-0.5, 0.5, 0, 0, 0, -1,  -1,1);

[Edspirit]

On 5/20/2014 at 7:04 PM, shadmar said:

Add the UV map (last two)

   surface->AddVertex(-0.5, -0.5, 0, 0, 0, -1,  -1,-1);
   surface->AddVertex(0.5, -0.5, 0, 0, 0, -1,  1,-1);
   surface->AddVertex(0.5, 0.5, 0, 0, 0, -1,   1,1);
   surface->AddVertex(-0.5, 0.5, 0, 0, 0, -1,  -1,1);

 

Hi @shadmar, 

How do you add the UV map in independent Vertex index? I didn't see any documentation on this topic.

Best Regards,

Ed

[Edspirit]

Hi All,

I did figure it out that you need to setup the coords for the tex to make it work.

Thanks all.

Best Regards,

Ed

[reepblue]

This code below creates a plane model facing forward along the Z axis with a squared texture uniformly mapped.

//-----------------------------------------------------------------------------
// Purpose:
//-----------------------------------------------------------------------------
Leadwerks::Model* CreatePlaneModel()
{
	auto mdl = Leadwerks::Model::Create();
	auto surf = mdl->AddSurface();

	surf->AddVertex(-0.5, -0.5, 0, 0, 0, -1);
	surf->AddVertex(0.5, -0.5, 0, 0, 0, -1);
	surf->AddVertex(0.5, 0.5, 0, 0, 0, -1);
	surf->AddVertex(-0.5, 0.5, 0, 0, 0, -1);
	surf->AddTriangle(2, 1, 0);
	surf->AddTriangle(0, 3, 2);
	surf->FlipNormals();
	surf->Update();

	surf->SetVertexTexCoords(1, Leadwerks::Vec2(0, 1), 0); // Bottom Left
	surf->SetVertexTexCoords(2, Leadwerks::Vec2(0, 0), 0); // Top Left
	surf->SetVertexTexCoords(3, Leadwerks::Vec2(1, 0), 0); // Top Right
	surf->SetVertexTexCoords(0, Leadwerks::Vec2(1, 1), 0); // Bottom Right

	mdl->UpdateAABB(Leadwerks::Entity::LocalAABB);
	mdl->UpdateAABB(Leadwerks::Entity::GlobalAABB);

	return mdl;
}

Hope this helps. 

[Edspirit]

3 hours ago, reepblue said:

surf->FlipNormals();

Thanks reepblue! I missed this piece of the code.

Best Regards,

Ed