[Set camera to a camera in the scene/level/map]

in the code above, there are two cameras, the one created in code, the one created in the editor. The one on the editor is over the first one, so if you run the code, you will see what the editor camera see. But the freelook is working on the code created camera who's viewport is overlapped by the editor camera viewport.

 

if i, inside the Vector items loop i write:

 

if (entity->GetKeyValue("name") == "EditorCamera") entity->Release();

 

then the editor camera is released and the code created camera is seen and work as supposed

 

So i get the camera from the editor, but can't assign it to the Camera type variable camera defined in app.h

the sentence camera=entity is not legal, the error message is:

a value of type "Leadwerks::Entity *" cannot be assigned to an entity of type "Leadwerks::Camera *"

 

does any one know if it is possible to do that?

[Set camera to a camera in the scene/level/map]

due to my lack of knowledge about c++ (and in general!)...

i can't give you a solution.

 

if you place a hook on the Load function, you may store map entities for future use. But entities are not strictly speaking a camera. i don't know how to cast an entity to a camera

 

for instance in app.cpp you may:

 

//Store entities
vector<Entity*> entities;
//Store all entities when map is loaded
void StoreWorldObjects(Entity* entity, Object* extra)
{
System::Print("Loaded an entity and stored it: " + entity->GetKeyValue("name"));
entities.push_back(entity);
}

 

and to load and invoke this function:

 

//Load the map
std::string mapname = System::GetProperty("map", "Maps/start.map");
//Map::Load(mapname);
Map::Load(mapname, StoreWorldObjects);
//Store position of every entity
vector<Entity*>::iterator iter = entities.begin();
int id = 0;
for (iter; iter != entities.end(); iter++)
{
 Entity* entity = *iter;
 if (entity->script != NULL) {
  System::Print(entity->GetKeyValue("name"));
 }
 // 2 IntelliSense: a value of type "Leadwerks::Entity *" cannot be assigned to an entity of type "Leadwerks::Camera *" c:\Users\usuario\Documents\Leadwerks\Projects\GetMapEntity\Source\App.cpp 60 61 GetMapEntity
 //if (entity->GetKeyValue("name") == "EditorCamera") camera = entity;
}

 

but, the camera=entity isn't legal

 

if it works, then , you may test ic camera==nil and if so (no camera from map) you can create the camera by code..

 

any idea?

 

(i started a thread about lua-cpp iterations, should be good to have a simple way of connecting both)

[i'm just starting to play and enjoy with Leadwerks!]

i'm using hinges only.

 

to get wheel rotation, simply read the current joint angle and set it to some value ahead, having motor enabled

speed is controlled by MotorSpeed

 

wheels are cylinders ... made by segments and so the whell gets jumping constantly and so, the vehicle goes slower that it should...

 

if you tell the camera to follow the vehicle, then you will see how unstable it is...

 

i'm not applying forces/torque, just MotorSpeed, Limits, Angle

 

also, to much or to less mass on the individual parts of the vehicle make it behave differently, bad/worse

 

i'm doing some code-clean-up, then i will post the scripts i'm using. Not sure if it is the correct way of doing things, but problably some one can point me in the right direction...

 

thank's for the comments

[i'm just starting to play and enjoy with Leadwerks!]

@shadmar: nice unrelated shoot!, at least it gives some beauty to this thread...

 

ok, now i'm controlling steer and speed

 

 

not too much stable, but working

[i'm just starting to play and enjoy with Leadwerks!]

thank's

if i have time, my intention is to create some prefabs/scripts to play with.

is a way of learning and have fun.

[i'm just starting to play and enjoy with Leadwerks!]

sliders will came late... and balls also

 

i'm still playing with hinges.

 

4 or 3 wheels: tricycle or car.. very elemental, with no control (until)

 

a couple of captures, on the editor, and running the code.

 

 

the video is uploading...

 

 

 

 

[Easy to use lua based grid for massive 3d entity management]

thank's for share it

 

just a small typo:

 

on grid.lua, start function

 

entities[x]:SetPosition(Math:Random(-500,500),0,SetPosition(Math:Random(-500,500))

 

 

should be

 

entities[x]:SetPosition(Math:Random(-500,500),0,Math:Random(-500,500))

 

[i'm just starting to play and enjoy with Leadwerks!]

not all is work!

 

 

Here the code that does the magic:

 

Create a sphere on start

 

function Script:Start()
--as this script is attached to the camera, here is a good place to
--set a global camera variable and so, it can be used in any other script of this project.
camera=self.entity
--Create a sphere to indicate where the pick hits
 self.picksphere = Model:Sphere()
 self.picksphere:SetColor(1.0,0.0,0.0)
 self.picksphere:SetPickMode(0)
 self.picksphere:SetScale(pickradius*2.0)
 self.picksphere:Hide()
System:Print("fly.lua start")
end

 

on the update world function:

 

if appWindow:MouseHit(1) then
		 local pickinfo = PickInfo()
		 local p = appWindow:GetMousePosition()

--do a camera pick
--place a new instance of the picksphere ent at the picked position
--place a hinge joint to keep the sphere and the picked object together
		 if (camera:Pick(p.x,p.y,pickinfo,pickradius,true)) then
local newEnt = self.picksphere:Instance()
newEnt:SetPhysicsMode(Entity.RigidBodyPhysics)
newEnt:SetMass(10)
local shape = Shape:Sphere()
newEnt:SetShape(shape)
shape:Release()
newEnt:SetPosition(pickinfo.position)
local hingeVar = Joint:Slider(pickinfo.position.x, pickinfo.position.y, pickinfo.position.z, 0, 0, 0, pickinfo.entity, newEnt)
hingeVar:SetLimits(0,0)
hingeVar:EnableLimits()
newEnt:Show()
		 end
 end

 

a note about: appWindow

 

on app.lua, i declare this global variable and pass the window created there, so i can use it on any other script

 

here the modification of app.lua:

 

appWindow=nil --global variable, so fly.lua can reach and use the window created on start
function App:Start()

--Initialize Steamworks (optional)
--Steamworks:Initialize()

--Set the application title
self.title="MyGame"
--Create a window
self.window=Window:Create(self.title)
--self.window:HideMouse() --do not hide the mouse pointer
appWindow=self.window  --set the global variable appWindow with the window just created

--rest of the script/function as default

[LE3 waving grass using shader ?]

here are my settings: alpha is on the diffuse texture, compression DXT5

 

 

 

and a snapshoot of the perspective view

[LE3 waving grass using shader ?]

yes, it works ok

movement is very small, which i guess is ok. don't try to modify or find a variable inside the shader to evantually set via coding.

 

it's fbx so placing it on the assets folder automatically convert it to mdl, mat etc

have to manually create the material

 

and set the texture as dtx5 if not alpha don't behaves as spected.

 

(i first test it with other models, but they were bought from dexsoft, and has to manipulate them the same way)

[LE3 waving grass using shader ?]

try a free one

 

http://tf3dm.com/3d-model/tree-alan-2-68600.html

 

remember to set diffuse texture as DTX5 (for alpha to work correctly), and naturally, to modify the material for the shader, specially texture 4 equal diffuse texture for the vegetation shader.

[is this a shadow normal behavior?]

thank's, understood.

 

then, the Dynamic drop down box is for?, shouldn't it be omitted if the entity is a brush instead of a model?

or the Shadows Dynamic has another purpose.

 

naturally, a question needs an explanation but, if there is a solution is better:

 

must i create a Shape and attach it to it?

must i create a prefab?

or the only solution is to use a 3d modeler, create a box, export as mdl and then import on the editor?

 

thank's in advance

[is this a shadow normal behavior?]

just open the MyGame\Maps\start.map

 

wrote the rotator.lua script of: http://www.leadwerks.com/werkspace/page/tutorials/_/script/creating-your-first-object-script-r110

 

and attach the script to Box2

[LE3 waving grass using shader ?]

i used tree objects with two meshes, one for trunk and other for branches/leaves

i used shaders applied to selected meshes which vasically read and modify vertex positions giving the illusion of movement.

grass waving shader do the exact thing.

 

i'm very new here and i'm in the stage of doing (or trying to do) simple things. When i have time, i'll try to see le shaders format and see if i can modify them easily. if not, will see or wait for some one else

 

i should read the previous post...! sorry

[is this a shadow normal behavior?]

Did you save map file before quit and restart ?

 

yes, after saving, no material appear to be applied. material control is empty

 

(also, there are no chances of de-attach a shader)

 

 

With a point light seems to work ok, shadows appear as supposed to be

 

may it be a directional light bug?

[FileSystem:WriteFile do not Create a file after update]

thank's disabling this checkbox makes it work again!

[LE3 waving grass using shader ?]

should be good not only for grass, for trees also.

[is this a shadow normal behavior?]

i'm just rotating a box, is the start map with the rotator script from tutorials

 

i try to modify Appeareance->Cast Shadows->Static/Dynamic, no difference

i see that the material has no Shadow shadder applied, does it should be applied

 

here the shadows, which seems to be created by the faces seen of the cube, when it started to ratate.

i'm shure that i'm missing something.

 

also, i noted that, no material seems to be applied to objects. if i apply one, the text box tells the material name, but i y quit and restart the editor, again the material textbox is empty. but the object has the correct material.

 

 

[FileSystem:WriteFile do not Create a file after update]

the following script fragment, were working ok,

today i update LE3 and logFile is nil, and the file isn;t created

 

(this fragment is just for testing that the entities table has the correct ones)

 

local logFile
logFile = FileSystem:WriteFile("log.txt")
if logFile ~= nil then
 for key,value in pairs(entities) do
  logFile:WriteLine(key)
  local pos = value:GetPosition() 
  logFile:WriteLine(pos.x)
 end
 logFile:Release()
end

 

does any one why?

[CPP - LUA interactions]

I'll look that carefully when i'll get back home. Thxs

I already use a hook on map.load but it has it's limitations. It would be good to have an easy way of intercomunication between both.

[CPP - LUA interactions]

is it good practice to mix both?

 

does cpp can call lua functions, use lua variables?

 

does lua scripts get access to cpp variables, objects, methods

 

for example, if i made an scene in the editor, attach some scripts to some objects, create and place the camera, etc

 

how can i get the reference to the editor's camera from cpp

 

the other way, if i create the camera with cpp, how can i reach it from a lua script.

 

thank's in advance

 

Juan

[How to make a continiously moving object?]

hi

 

you have to define a Vec3 variable to hold the position, then you can set/test/change individual values

 

Vec3 Position

 

Position = Entity:GetPosition()

 

Then.... Position.x = Position.x+1

 

i wrote a simple script using Sin and Cos to simulate a Circular movement, you may change speedFactor on x and y coords

 

Script.xVel=1.0--float x_velocity
Script.yVel=1.0--float y_velocity
Script.entPos=Vec3
Script.initialPos=Vec3

function Script:Start()
 --store initial position
 initialPos = self.entity:GetPosition(false)
end

function Script:UpdateWorld()
 --read current position
 entPos = self.entity:GetPosition(false)
 --calc new position, relative to the initial one
 entPos.y =  initialPos.y + Math:Sin(Time:GetCurrent()/10.0) * self.yVel
 entPos.x =  initialPos.x + Math:Cos(Time:GetCurrent()/10.0) * self.xVel
 --update new position
 self.entity:SetPosition(entPos.x, entPos.y, entPos.z)
end

 

create or use a map with one box, and attach this script to the box

 

to create and attach a script (start form zero) read:

http://www.leadwerks.com/werkspace/page/tutorials/_/script/creating-your-first-object-script-r110

[Veg material]

thank's dxt5 does the difference for me too!

[is it possible to draw an image as background and render over it?]

ha!, that's the hard way, i was looking for an easier one

 

but's better than nothing! thxs

[is it possible to draw an image as background and render over it?]

i realize that 2 worlds aren't needed.

 

i already have an image for background, so i don't need a background world to render.

 

i simplify the code above (with no mouse look) and with only one world

 

basically what is needed is a buffer to render 3d objects and a background image, the magic is done combining the 2 images with

 

//Draw image, then foreground
context->Enable();
context->SetBlendMode(Blend::Alpha);
context->DrawImage(backImg, 0, 0);
context->DrawImage(foreground->GetColorTexture(), 0, 0);
context->SetBlendMode(Blend::Solid);

 

here the code:

#include "App.h"
using namespace Leadwerks;
App::App() : window(NULL), context(NULL), world(NULL), camera(NULL) {}
App::~App() { delete world; delete window; }

Buffer* foreground = NULL;
Texture* backImg = NULL;
bool App::Start()
{
//Create a window
window = Leadwerks::Window::Create("cpp_worlds");
//Create a context
context = Context::Create(window);
//Create a world
world = World::Create();
//create buffer for foreground
foreground = Buffer::Create(context->GetWidth(), context->GetHeight(), 1, 1, 0);
//create camera for the foreground
World::SetCurrent(world);
camera = Camera::Create();
camera->Move(0, 2, -5);
//Hide the mouse cursor
//window->HideMouse();
//Load the map
std::string mapname = System::GetProperty("map", "Maps/start.map");
Map::Load(mapname);
//Move the mouse to the center of the screen
window->SetMousePosition(context->GetWidth() / 2, context->GetHeight() / 2);

//load the background image
backImg = Texture::Load("Materials/backgrounds/backImg.tex");
return true;
}
bool App::Loop()
{
//Close the window to end the program
if (window->Closed()) return false;

//Render foreground
foreground->Enable();
world->Update();
world->Render();
foreground->Disable();
//Draw image, then foreground
context->Enable();
context->SetBlendMode(Blend::Alpha);
context->DrawImage(backImg, 0, 0);
context->DrawImage(foreground->GetColorTexture(), 0, 0);
context->SetBlendMode(Blend::Solid);
context->Sync(false);
return true;
}

 

btw, where is the buffer documentation?

 

i understand what is happening but i wish to read/know wich other functions/methods are available for buffers