function GameLevel(playerStartPosition, bottomHeight, platforms, trampolines, goal) {
	this.platforms = platforms;
	this.trampolines = trampolines;
	this.playerStartPosition = playerStartPosition;
	this.bottomHeight = bottomHeight;
	this.goal = goal;
	
	this.platformVBO = null;
	this.trampolineVBO = null;
}

GameLevel.prototype.draw = function(gl) {
	if (this.platformVBO == null) {
		this.constructPlatformVBO(gl);
	}
	if (this.trampolineVBO == null && this.trampolines.length > 0) {
		this.constructTrampolineVBO(gl);
	}
	
	gl.enableVertexAttribArray(0);
	gl.uniformMatrix4fv(gl.getUniformLocation(gl.program, "uPMatrix"), false, new WebGLFloatArray(gl.projectionMatrix.m));
	gl.uniformMatrix4fv(gl.getUniformLocation(gl.program, "uMVMatrix"), false, new WebGLFloatArray(gl.modelviewMatrix.m));
	
	gl.bindBuffer(gl.ARRAY_BUFFER, this.platformVBO);
	gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
	gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.platformEBO);
	gl.uniform4f(gl.getUniformLocation(gl.program, "constantColor"), 1.0, 1.0, 1.0, 1.0);
	gl.drawElements(gl.TRIANGLES, this.platformIndexCount, gl.UNSIGNED_SHORT, 0);
	
	if (this.trampolineVBO != null) {
		gl.bindBuffer(gl.ARRAY_BUFFER, this.trampolineVBO);
		gl.vertexAttribPointer(0, 3, gl.FLOAT, false, 0, 0);
		gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.trampolineEBO);
		gl.uniform4f(gl.getUniformLocation(gl.program, "constantColor"), 1.0, 0.5, 0.0, 1.0);
		gl.drawElements(gl.TRIANGLES, this.trampolineIndexCount, gl.UNSIGNED_SHORT, 0);
	}
	
	this.goal.draw(gl);
}

GameLevel.prototype.constructPlatformVBO = function(gl) {
	var vertices = new Array();
	var indexes = new Array();
	
	for (var platformIndex = 0; platformIndex < this.platforms.length; platformIndex++) {
		var platform = this.platforms[platformIndex];
		vertices.push(platform.left,  platform.y, platform.back,
		              platform.left,  platform.y, platform.front,
		              platform.right, platform.y, platform.front,
		              platform.right, platform.y, platform.back);
		
		indexes.push(platformIndex * 4 + 0, platformIndex * 4 + 1, platformIndex * 4 + 2,
		             platformIndex * 4 + 2, platformIndex * 4 + 3, platformIndex * 4 + 0);
	}
	
	this.platformVBO = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, this.platformVBO);
	gl.bufferData(gl.ARRAY_BUFFER, new WebGLFloatArray(vertices), gl.STATIC_DRAW);
	
	this.platformEBO = gl.createBuffer();
	gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.platformEBO);
	gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new WebGLUnsignedShortArray(indexes), gl.STATIC_DRAW);
	
	this.platformIndexCount = indexes.length;
}

GameLevel.prototype.constructTrampolineVBO = function(gl) {
	var vertices = new Array();
	var indexes = new Array();
	
	for (var trampolineIndex = 0; trampolineIndex < this.trampolines.length; trampolineIndex++) {
		var trampoline = this.trampolines[trampolineIndex];
		vertices.push(trampoline.left,  trampoline.y, trampoline.back,
		              trampoline.left,  trampoline.y, trampoline.front,
		              trampoline.right, trampoline.y, trampoline.front,
		              trampoline.right, trampoline.y, trampoline.back);
		
		indexes.push(trampolineIndex * 4 + 0, trampolineIndex * 4 + 1, trampolineIndex * 4 + 2,
		             trampolineIndex * 4 + 2, trampolineIndex * 4 + 3, trampolineIndex * 4 + 0);
	}
	
	this.trampolineVBO = gl.createBuffer();
	gl.bindBuffer(gl.ARRAY_BUFFER, this.trampolineVBO);
	gl.bufferData(gl.ARRAY_BUFFER, new WebGLFloatArray(vertices), gl.STATIC_DRAW);
	
	this.trampolineEBO = gl.createBuffer();
	gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.trampolineEBO);
	gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new WebGLUnsignedShortArray(indexes), gl.STATIC_DRAW);
	
	this.trampolineIndexCount = indexes.length;
}