more than one view c++, found a way, need to know a better one :)

[Charrua]

Hi

 

I need 5 cameras and show what each is seeing in separate views.

 

the description of the function SetRenderTarget says:

This functions sets a camera to render directly to a texture. The texture can be used in a material and applied to an object, or drawn onscreen.

 

so, i create the cameras, create the textures and set them as render target but textures don't get updated as i guessed.

 

so textures can be drawn on screen but don't get updated.

 

Searching i found this thread

 

http://www.leadwerks.com/werkspace/topic/13211-trouble-with-render-targets/page__hl__setrendertarget#entry93400

 

and seems that SetRenderTarget can't be used as i supposed it should be.

 

I started to use buffers but seems that i have to do one render world per camera/buffer to get what i want.

 

is it possible to do the same thing without 5 renders?

in a smart way which i don't imagine

 

here is the code i get working

 

#include "App.h"
using namespace Leadwerks;
App::App() : window(NULL), context(NULL), world(NULL), camera(NULL) {}
App::~App() { delete world; delete window; }
Model* models[5]; //just to show something
Camera *cams[5]; // five cameras one for each view
Buffer *buffs[5]; // one buffer per view
const int numViews = 5;

bool App::Start()
{
window = Window::Create();
context = Context::Create(window);
world = World::Create();
Light* light = DirectionalLight::Create();
light->SetRotation(35, 35, 0);
// create one object per view
models[0] = Model::Box();
models[0]->SetColor(1.0, 0.0, 0.0);
models[0]->SetPosition(-4, 0, 0);
models[1] = Model::Cylinder();
models[1]->SetColor(0.0, 1.0, 0.0);
models[1]->SetPosition(-2, 0, 0);
models[2] = Model::Cone();
models[2]->SetColor(0.0, 0.0, 1.0);
models[2]->SetPosition(0, 0, 0);
models[3] = Model::Cylinder();
models[3]->SetColor(0.0, 1.0, 1.0);
models[3]->SetPosition(2, 0, 0);
models[4] = Model::Box();
models[4]->SetColor(1.0, 0.0, 1.0);
models[4]->SetPosition(4, 0, 0);
//create each camera and buffer
for (int i = 0; i < numViews; i++){
cams[i] = Camera::Create();
cams[i]->Move(-4 + i * 2, 0, -6);
cams[i]->Hide();
buffs[i] = Buffer::Create(context->GetWidth() / numViews, context->GetHeight());
}

return true;
}
bool App::Loop()
{
if (window->Closed() || window->KeyDown(Key::Escape)) return false;
for (int i = 0; i < numViews; i++){
models[i]->Turn(Time::GetSpeed()*0.2*(i+1), 0, 0);
}
Time::Update();
world->Update();

for (int i = 0; i < numViews; i++){
buffs[i]->Enable();
cams[i]->Show();
world->Render(); //is it neccesary to do 5 world renders?
cams[i]->Hide();
buffs[i]->Disable();
}

context->Enable();
//draw each buffer
for (int i = 0; i < numViews; i++){
context->DrawImage(buffs[i]->GetColorTexture(), i*context->GetWidth()/numViews, 0);
context->DrawLine(i*context->GetWidth() / numViews, 0, i*context->GetWidth() / numViews, context->GetHeight());
}
context->Sync();
return true;
}

 

thank's in advance

 

jio