add matrix.perspective() function.

js/pixl/public/trixl.html

@@ -228,6 +228,15 @@
				 0, 0, 0, 1
			];
		}
		matrix.persective = function(fov, aspect) {
			return [
				Math.PI / 3 / aspect, 0, 0, 0,
				0, Math.PI / 3, 0, 0,
				0, 0, 1, 1,
				0, 0, 0, 1
			];
		}
	</script>
	<script>
		window.trixl = {};
@@ -282,14 +291,7 @@
					//matrix.rotateY(angle.y / 10),
					matrix.rotateX(angle.x / 10),
					matrix.translate(pos[0] + offset.x, pos[1] + offset.y, pos[2] + offset.z),
					[1, 0, 0, 0,
					 0, 1, 0, 0,
					 0, 0, 1, 1,
					 0, 0, 0, 1],
					[Math.PI / 3 / aspect, 0, 0, 0,
					 0, Math.PI / 3, 0, 0,
					 0, 0, 1, 0,
					 0, 0, 0, 1]
					matrix.persective(Math.PI / 3, aspect)
				);
			}
			var t = transform([0.0, 0.0, 2]);