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Howto:Dynamic Liveries via Canvas (view source)
Revision as of 20:35, 18 September 2014
, 20:35, 18 September 2014→Canvas Code: add untested snippet
var window = canvas.Window.new([512,512],"dialog");
var window = canvas.Window.new([512,512],"dialog");
window.setCanvas(myCanvas);
window.setCanvas(myCanvas);
</syntaxhighlight>
Here's another slightly-restructured version (untested), to better encapsulate the concept of a "managed texture" so that the code can be reused for other aircraft/purposes, e.g. for placing bullet holes etc:
<syntaxhighlight lang="nasal">
var ManagedTexture = {
# this create a new TextureManager object
new: func(name, size, path) {
# create a temporary object that inherits from TextureManager
var m = {parents:[ManagedTexture]};
# Create a standalone Canvas (not attached to any GUI dialog/aircraft etc)
m.canvas = canvas.new({
"name": name, # The name is optional but allow for easier identification
"size": [size[0], size[1]], # Size of the underlying texture (should be a power of 2, required) [Resolution]
"view": [size[0], size[1]], # Virtual resolution (Defines the coordinate system of the canvas [Dimensions]
# which will be stretched the size of the texture, required)
"mipmapping": 1 # Enable mipmapping (optional)
});
# create our top-level/root group that contains all other Canvas elements
m.root = m.canvas.createGroup();
# hash with all layers/images added
m.layers = {};
var.basepath = path;
# return the new object to the caller
return m;
},
replaceTexture: func(name) {
# Add a placement by replacing the textured face specified (name) in the 3D model
# This replaces the texture on the aircraft and attaches the Canvas texture
m.canvas.addPlacement({"node": name});
},
addDynamicLayer: func(filename, callback=nil) {
if(contains(layers, image)) print("Warning: replacing texture (added twice): ", image);
# Put a raster image into the canvas and save the image in a hash: layers['EF2000.png].hide();
m.layers[image] = root.createChild("image")
.setFile( path~image )
.setSize(2048,2048)
return m.layers[image];
},
}; # of ManagedTexture
# now, create a new managed texture, specifying the path to use for texture lookups
var ExhaustDirt = ManagedTexture.new( name:"ExhaustDirt",
size:[2048,2048],
path:'Aircraft/EF2000/Models/' );
ExhaustDirt.replaceTexture('Fuselage');
# Create a Canvas dialog window to hold the canvas and show that it's working
# the Canvas is now standalone, i.e. continues to live once the dialog is closed!
var window = canvas.Window.new([512,512],"dialog");
window.setCanvas(ExhaustDirt.canvas);
foreach(var layer; [ {file:'EF2000.png'},
{file:'EF2000-dirt.png'} ]) {
ExhaustDirt.addDynamicLayer(layer.file);
}
var timer_hide = maketimer(3.0, func() {
ExhaustDirt.layers['EF2000-dirt.png'].hide();
});
var timer_show = maketimer(5.0, func() {
ExhaustDirt.layers['EF2000-dirt.png'].show();
});
# start those two timers to hide/show the dirt texture with 2 second delays
timer_hide.start();
timer_show.start();
</syntaxhighlight>
</syntaxhighlight>