3
여기에서 누락 된 내용을 찾을 수 없습니다. 왜이 오류가 발생합니까? Uncaught ReferenceError : createShaderFromScriptElement가 정의되지 않았습니다.Webgl Uncaught ReferenceError : createShaderFromScriptElement가 정의되지 않았습니다.
이 튜토리얼은 일반적인 튜토리얼에서 가져 와서 붙여 넣었습니다. 브라우저 : 파이어 폭스와 크롬 -> 두 브라우저
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Zooming via HTML5 Canvas Context</title>
</head>
<body>
<canvas id="canvas" width="200" height="200"></canvas>
<script id="2d-vertex-shader" type="x-shader/x-vertex">
attribute vec2 a_position;
void main() {
gl_Position = vec4(a_position, 0, 1);
}
</script>
<script id="2d-fragment-shader" type="x-shader/x-fragment">
void main() {
gl_FragColor = vec4(0,1,0,1); // green
}
</script>
<script>
window.onload = function() {
// Get A WebGL context
var canvas = document.getElementById("canvas");
var gl = canvas.getContext("experimental-webgl");
// setup a GLSL program
var vertexShader = createShaderFromScriptElement(gl, "2d-vertex-shader");
var fragmentShader = createShaderFromScriptElement(gl, "2d-fragment-shader");
var program = createProgram(gl, [vertexShader, fragmentShader]);
gl.useProgram(program);
// look up where the vertex data needs to go.
var positionLocation = gl.getAttribLocation(program, "a_position");
// Create a buffer and put a single clipspace rectangle in
// it (2 triangles)
var buffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
gl.bufferData(
gl.ARRAY_BUFFER,
new Float32Array([
-1.0, -1.0,
1.0, -1.0,
-1.0, 1.0,
-1.0, 1.0,
1.0, -1.0,
1.0, 1.0]),
gl.STATIC_DRAW);
gl.enableVertexAttribArray(positionLocation);
gl.vertexAttribPointer(positionLocation, 2, gl.FLOAT, false, 0, 0);
// draw
gl.drawArrays(gl.TRIANGLES, 0, 6);
}
</script>
</body>
</html>
대단히 고맙습니다. 나는 무엇인가 놓쳤다는 것을 알았습니다! – kaljak