Peter Nyboer

i found an earlier thread that cmdlist isn't supported by a JS listener, but I'm wondering it's possible to add commands to the list via JS. I have some commands formatted as such (for example):

        hl_o.cmd_insert(0, "moveto"+ movex, movey+" 1");

        hl_o.cmd_insert(1,"glcolor 0 0 .7 1");

        hl_o.cmd_insert(2,"glbindtexture masktexture");

        hl_o.cmd_insert(3,"plane"+griddivx,griddivy);

        hl_o.cmd_insert(4,"glbindtexture");

        hl_o.cmd_insert(5,"glcolor 1 1 1 1");

        render.erase_color=[0.7, 0.7, 0.7,1]

which doesn't generate any errors, but doesn't do the same as:

        hl_o.moveto(movex,movey,1);

        hl_o.glbindtexture("masktexture");

        hl_o.plane(griddivx,griddivy);

I can provide more example, if needed, but I'd like to check if it's worth the time, of maybe cmd_insert just isn't supported in JS.

i found an earlier thread that cmdlist isn't supported by a JS listener, but I'm wondering it's possible to add commands to the list via JS.  I have some commands formatted as such (for example):

		var movex = .1;
		var movey = .2;
		hl_o.cmd_insert(0, "moveto"+ movex, movey+" 1");
		hl_o.cmd_insert(1,"glcolor 0 0 .7 1");
		hl_o.cmd_insert(2,"glbindtexture masktexture");
		hl_o.cmd_insert(3,"plane"+griddivx,griddivy);
		hl_o.cmd_insert(4,"glbindtexture");
		hl_o.cmd_insert(5,"glcolor 1 1 1 1");
		render.erase_color=[0.7, 0.7, 0.7,1]
		hl_o.draw();
		render.drawswap();

which doesn't generate any errors, but doesn't do the same as:
		var movex = .1;
		var movey = .2;
		hl_o.moveto(movex,movey,1);
		hl_o.glcolor(0,0,.7,1);
		hl_o.glbindtexture("masktexture");
		hl_o.plane(griddivx,griddivy);
		hl_o.glbindtexture();
		hl_o.glcolor(1,1,1,1);
		render.erase_color=[0.7, 0.7, 0.7,1]
		hl_o.draw();
		render.drawswap();

cmdlist-in-javascript

On Apr 24, 2007, at 8:52 PM, pnyboer wrote:

> i found an earlier thread that cmdlist isn't supported by a JS 

> listener, but I'm wondering it's possible to add commands to the 

> list via JS. I have some commands formatted as such (for example):

>         hl_o.cmd_insert(0, "moveto"+ movex, movey+" 1");

Don't make strings with the + operator. Use commas, as you do below. 

This is a common mistake of Maxers thinking that JS strings are 

parsed into atoms like a message box in Max. They are not.

>         hl_o.moveto(movex,movey,1);

Let us know if that doesn't work for you.

>
> i found an earlier thread that cmdlist isn't supported by a JS  
> listener, but I'm wondering it's possible to add commands to the  
> list via JS.  I have some commands formatted as such (for example):
>
> 		var movex = .1;
> 		var movey = .2;
> 		hl_o.cmd_insert(0, "moveto"+ movex, movey+" 1");

Don't make strings with the + operator. Use commas, as you do below.  
This is a common mistake of Maxers thinking that JS strings are  
parsed into atoms like a message box in Max. They are not.

the reason I tried putting argurments into a symbol is that this:

        hl_o.cmd_insert(0, moveto, movex, movey);

        hl_o.cmd_insert(1,glcolor, 0, 0, .7, 1);

        hl_o.cmd_insert(2,glbindtexture, masktexture);

        hl_o.cmd_insert(3,plane,griddivx,griddivy);

        hl_o.cmd_insert(4,glbindtexture);

        hl_o.cmd_insert(5,glcolor, 1, 1, 1, 1);

? error: js: clipbank.js: Javascript ReferenceError: moveto is not defined, line 170

so I thought maybe I needed to pass the arguments as a symbol. Since that didn't produce an error, I thought my chances had at least improved.

the reason I tried putting argurments into a symbol is that this:
		hl_o.cmd_insert(0, moveto, movex, movey);
		hl_o.cmd_insert(1,glcolor, 0, 0, .7, 1);
		hl_o.cmd_insert(2,glbindtexture, masktexture);
		hl_o.cmd_insert(3,plane,griddivx,griddivy);
		hl_o.cmd_insert(4,glbindtexture);
		hl_o.cmd_insert(5,glcolor, 1, 1, 1, 1);

results in an error:
? error: js: clipbank.js: Javascript ReferenceError: moveto is not defined, line 170

so I thought maybe I needed to pass the arguments as a symbol.  Since that didn't produce an error, I thought my chances had at least improved.

if using cmdlist isn't going to work, then I guess the real question is

how can I do a mouse-over highlight in gl.sketch without needing to clear and redraw the *entire context? I had hoped to use cmdlist to draw a rectangle highlight over a "grid cell" in a grid, then easily delete it and redraw it elsewhere, without having to upset the rest of the scene.

if using cmdlist isn't going to work, then I guess the real question is
how can I do a mouse-over highlight in gl.sketch without needing to clear and redraw the *entire context?  I had hoped to use cmdlist to draw a rectangle highlight over a "grid cell" in a grid, then easily delete it and redraw it elsewhere, without having to upset the rest of the scene.

On Apr 25, 2007, at 8:54 AM, pnyboer wrote:

> the reason I tried putting argurments into a symbol is that this:

>         hl_o.cmd_insert(0, moveto, movex, movey);

> ? error: js: clipbank.js: Javascript ReferenceError: moveto is not 

> so I thought maybe I needed to pass the arguments as a symbol.

A *symbol* must be passed as a JS string. In the above, moveto would 

refer to a JS variable which doesn't exist. In your attempt to use 

the string concatenation + operator, you discovered that a long 

string containing multiple atoms (i.e. symbols, integers, and/or 

floats) as *text* is treated as a single symbol, not as a set of 

hl_o.cmd_insert(0, "moveto "+movex, movey);

Corresponds to a max message containing *three* elements:

hl_o.cmd_insert(0, "moveto", movex, movey);

Which corresponds to the max message containing *four* elements:

This is just like outlet calls and everything else in JSMax, and 

is a fundamental thing to understand. I hope that this distinction is 

> the reason I tried putting argurments into a symbol is that this:
> 		hl_o.cmd_insert(0, moveto, movex, movey);
>
> results in an error:
> ? error: js: clipbank.js: Javascript ReferenceError: moveto is not  
> defined, line 170
>
> so I thought maybe I needed to pass the arguments as a symbol.

A *symbol* must be passed as a JS string. In the above, moveto would  
refer to a JS variable which doesn't exist. In your attempt to use  
the string concatenation + operator, you discovered that a long  
string containing multiple atoms (i.e. symbols, integers, and/or  
floats) as *text* is treated as a single symbol, not as a set of  
atoms. i.e.:

This is just like outlet calls and everything else in JSMax, and  
is a fundamental thing to understand. I hope that this distinction is  
now clear.

ok, yeah, thanks for kicking my tiny brain into gear.

I actually do understand this, but I was convinced that I didn't know what was happening.

Of course I got an error - since it wasn't in quotes, JS thought the moveto was a variable, which of course hadn't been defined, so it gave an error. duh.

ok, yeah, thanks for kicking my tiny brain into gear.
I actually do understand this, but I was convinced that I didn't know what was happening.
Of course I got an error - since it wasn't in quotes, JS thought the moveto was a variable, which of course hadn't been defined, so it gave an error.  duh.

Quote: pnyboer wrote on Wed, 25 April 2007 17:54

----------------------------------------------------

>         hl_o.cmd_insert(1,glcolor, 0, 0, .7, 1);

>         hl_o.cmd_insert(2,glbindtexture, masktexture);

>         hl_o.cmd_insert(3,plane,griddivx,griddivy);

>         hl_o.cmd_insert(4,glbindtexture);

>         hl_o.cmd_insert(5,glcolor, 1, 1, 1, 1);

> ? error: js: clipbank.js: Javascript ReferenceError: moveto is not defined, line 170

> so I thought maybe I needed to pass the arguments as a symbol. Since that didn't produce an error, I thought my chances had at least improved.

Quote: pnyboer wrote on Wed, 25 April 2007 17:54
----------------------------------------------------
> the reason I tried putting argurments into a symbol is that this:
> 		hl_o.cmd_insert(0, moveto, movex, movey);
> 		hl_o.cmd_insert(1,glcolor, 0, 0, .7, 1);
> 		hl_o.cmd_insert(2,glbindtexture, masktexture);
> 		hl_o.cmd_insert(3,plane,griddivx,griddivy);
> 		hl_o.cmd_insert(4,glbindtexture);
> 		hl_o.cmd_insert(5,glcolor, 1, 1, 1, 1);
>
> results in an error:
> ? error: js: clipbank.js: Javascript ReferenceError: moveto is not defined, line 170
>
> so I thought maybe I needed to pass the arguments as a symbol.  Since that didn't produce an error, I thought my chances had at least improved.
>
> Thanks,
>
> Peter.
>
----------------------------------------------------


cmdlist in javascript