How to draw a triangle with OpenGLRenderer?

krogank9 · May 24, 2018, 7:55pm

I’m trying to get a simple opengl program up and running so I can follow some webgl tutorials and learn with haxe. Trying to draw a triangle from the lime & openfl examples demonstrating using opengl, but can’t get it to work. It doesn’t render the triangle.

Here’s my class, can anyone point me in the right direction?

GLSprite.hx:
https://pastebin.com/WVCB8u6c
Main.hx:
https://pastebin.com/Mi9SDQND

singmajesty · May 24, 2018, 9:23pm

Does renderer.setShader (null) make a difference? I think you may need to do this if you are plugging in your own shader to unbind the attributes used in the default shader. Like this:

github.com

openfl/openfl-samples/blob/master/haxelib/demos/HerokuShaders/Source/Main.hx#L181


		}
		
		return randomArray;
		
	}
	
	
	private function render (event:RenderEvent):Void {
		
		var renderer:OpenGLRenderer = cast event.renderer;
		renderer.setShader (null);
		var gl = renderer.gl;
		
		glInitialize (gl);
		
		if (glCurrentProgram == null) return;
		
		var time = Lib.getTimer () - startTime;
		
		gl.useProgram (glCurrentProgram);

krogank9 · May 25, 2018, 1:47am

Nope that didn’t work either.