Initial Query

Draw an image of a triangle using WebGL in a single HTML file. Make the canvas take the full page.

LLM Generation

Query

Draw an image of a triangle using WebGL in a single HTML file. Make the canvas take the full page.

Output

Here's a complete HTML file that creates a full-page WebGL canvas with a white triangle on a black background: 

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<!DOCTYPE html>
<html>
<head>
    <title>WebGL Triangle</title>
    <style>
        * { margin: 0; padding: 0; }
        canvas { display: block; width: 100%; height: 100%; }
    </style>
</head>
<body>
    <canvas id="glCanvas"></canvas>

    <script>
        // Initialize WebGL
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        // Set canvas size to full window
        function resizeCanvas() {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
            gl.viewport(0, 0, canvas.width, canvas.height);
        }
        window.addEventListener('resize', resizeCanvas);
        resizeCanvas();

        // Vertex shader
        const vsSource = `
            attribute vec4 aVertexPosition;
            void main() {
                gl_Position = aVertexPosition;
            }
        `;

        // Fragment shader
        const fsSource = `
            void main() {
                gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); // White color
            }
        `;

        // Compile shader
        function compileShader(gl, source, type) {
            const shader = gl.createShader(type);
            gl.shaderSource(shader, source);
            gl.compileShader(shader);
            
            if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
                console.error('Shader compile error:', gl.getShaderInfoLog(shader));
                gl.deleteShader(shader);
                return null;
            }
            return shader;
        }

        // Create shader program
        const vertexShader = compileShader(gl, vsSource, gl.VERTEX_SHADER);
        const fragmentShader = compileShader(gl, fsSource, gl.FRAGMENT_SHADER);
        const shaderProgram = gl.createProgram();
        gl.attachShader(shaderProgram, vertexShader);
        gl.attachShader(shaderProgram, fragmentShader);
        gl.linkProgram(shaderProgram);

        if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
            console.error('Program link error:', gl.getProgramInfoLog(shaderProgram));
        }

        // Triangle vertices
        const vertices = new Float32Array([
             0.0,  0.5, 0.0,  // Top
            -0.5, -0.5, 0.0,  // Left
             0.5, -0.5, 0.0   // Right
        ]);

        // Create buffer
        const vertexBuffer = gl.createBuffer();
        gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
        gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);

        // Set up vertex attributes
        const positionLocation = gl.getAttribLocation(shaderProgram, 'aVertexPosition');
        gl.enableVertexAttribArray(positionLocation);
        gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 0, 0);

        // Render
        gl.useProgram(shaderProgram);
        gl.clearColor(0.0, 0.0, 0.0, 1.0); // Black background
        gl.clear(gl.COLOR_BUFFER_BIT);
        gl.drawArrays(gl.TRIANGLES, 0, 3);
    </script>
</body>
</html>
This code: 1. Creates a full-page canvas using CSS 2. Initializes WebGL context 3. Sets up vertex and fragment shaders 4. Creates a buffer with triangle vertices 5. Links the shaders and sets up attribute pointers 6. Draws a white triangle on a black background The triangle vertices are defined in normalized device coordinates (-1 to 1 in all directions) and form an equilateral triangle centered on the screen. Key features: - Automatically resizes with window - Simple white triangle - Black background - Error checking for shader compilation - Clean WebGL setup and teardown To use this, simply save it as an HTML file and open it in a modern web browser. The triangle will automatically adjust its size when you resize the window.

Extract Code

I extracted the following code from that output: 

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<!DOCTYPE html>
<html>
<head>
    <title>WebGL Triangle</title>
    <style>
        * { margin: 0; padding: 0; }
        canvas { display: block; width: 100%; height: 100%; }
    </style>
</head>
<body>
    <canvas id="glCanvas"></canvas>

    <script>
        // Initialize WebGL
        const canvas = document.getElementById('glCanvas');
        const gl = canvas.getContext('webgl');

        // Set canvas size to full window
        function resizeCanvas() {
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
            gl.viewport(0, 0, canvas.width, canvas.height);
        }
        window.addEventListener('resize', resizeCanvas);
        resizeCanvas();

        // Vertex shader
        const vsSource = `
            attribute vec4 aVertexPosition;
            void main() {
                gl_Position = aVertexPosition;
            }
        `;

        // Fragment shader
        const fsSource = `
            void main() {
                gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0); // White color
            }
        `;

        // Compile shader
        function compileShader(gl, source, type) {
            const shader = gl.createShader(type);
            gl.shaderSource(shader, source);
            gl.compileShader(shader);
            
            if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
                console.error('Shader compile error:', gl.getShaderInfoLog(shader));
                gl.deleteShader(shader);
                return null;
            }
            return shader;
        }

        // Create shader program
        const vertexShader = compileShader(gl, vsSource, gl.VERTEX_SHADER);
        const fragmentShader = compileShader(gl, fsSource, gl.FRAGMENT_SHADER);
        const shaderProgram = gl.createProgram();
        gl.attachShader(shaderProgram, vertexShader);
        gl.attachShader(shaderProgram, fragmentShader);
        gl.linkProgram(shaderProgram);

        if (!gl.getProgramParameter(shaderProgram, gl.LINK_STATUS)) {
            console.error('Program link error:', gl.getProgramInfoLog(shaderProgram));
        }

        // Triangle vertices
        const vertices = new Float32Array([
             0.0,  0.5, 0.0,  // Top
            -0.5, -0.5, 0.0,  // Left
             0.5, -0.5, 0.0   // Right
        ]);

        // Create buffer
        const vertexBuffer = gl.createBuffer();
        gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
        gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);

        // Set up vertex attributes
        const positionLocation = gl.getAttribLocation(shaderProgram, 'aVertexPosition');
        gl.enableVertexAttribArray(positionLocation);
        gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 0, 0);

        // Render
        gl.useProgram(shaderProgram);
        gl.clearColor(0.0, 0.0, 0.0, 1.0); // Black background
        gl.clear(gl.COLOR_BUFFER_BIT);
        gl.drawArrays(gl.TRIANGLES, 0, 3);
    </script>
</body>
</html>

Check if all of the following conditions are true:

HTML Render

Rendering the webpage gives the following image:

LLM Generation

Query

This is a screenshot of a webpage that draws something with webgl. I'm trying to see if it drew what I wanted. Describe what is drawn in this image?

Output

The image shows a white triangle centered on a black background.

LLM Generation

Query

Does this answer say that there is a picture of a triangle "The image shows a white triangle centered on a black background."? Answer "Yes it does" or "No it does not".

Output

Yes it does.

Substring Evaluation

Testing if the previous output contains the string es it does: True

Check this condition is not true:

Substring Evaluation

Testing if the previous output contains the string THREE.: False

Final Answer: True

Final Answer: True