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Move vertex data out of the render loop

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This commit is contained in:
Brandon Dyck 2022-10-23 09:56:44 -06:00
parent 03fc64b7eb
commit b91ab4b547
1 changed files with 17 additions and 13 deletions
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30
panorama-viewer.js
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@ -106,9 +106,20 @@
viewer.addEventListener("mouseover", runPanState);
viewer.addEventListener("mousemove", runPanState);
gl.useProgram(program);
let vertexBuffer = gl.createBuffer();
let vertices = new Float32Array([
0, 0, 0,
1, 0, 0,
1, 1, 0,
]);
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
const positionLocation = gl.getAttribLocation(program, "position");
// Load texture
let image = document.getElementById("image");
let texture = loadTexture(gl, image);
loadTexture(gl, image);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);
let textureCoordBuffer = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, textureCoordBuffer);
@ -119,32 +130,25 @@
]);
gl.bufferData(gl.ARRAY_BUFFER, textureCoords, gl.STATIC_DRAW);
const textureCoordLocation = gl.getAttribLocation(program, "textureCoord");
gl.enableVertexAttribArray(textureCoordLocation);
gl.vertexAttribPointer(textureCoordLocation, 3, gl.FLOAT, false, 4 * 2, 0);
const render = () => {
gl.useProgram(program);
let vertexBuffer = gl.createBuffer();
let vertices = new Float32Array([
0, 0, 0,
1, 0, 0,
1, 1, 0,
]);
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
gl.bufferData(gl.ARRAY_BUFFER, vertices, gl.STATIC_DRAW);
// Create the transformation matrix.
let modelMatrix = mat4.create();
mat4.rotateX(modelMatrix, modelMatrix, θx);
mat4.rotateY(modelMatrix, modelMatrix, θy);
gl.uniformMatrix4fv(modelMatrixLocation, false, modelMatrix);
let positionLocation = gl.getAttribLocation(program, "position");
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
gl.enableVertexAttribArray(positionLocation);
gl.vertexAttribPointer(positionLocation, 3, gl.FLOAT, false, 4 * 3, 0);
gl.drawArrays(gl.TRIANGLES, 0, 3);
gl.bindBuffer(gl.ARRAY_BUFFER, textureCoordBuffer);
gl.enableVertexAttribArray(textureCoordLocation);
gl.vertexAttribPointer(textureCoordLocation, 3, gl.FLOAT, false, 4 * 2, 0);
requestAnimationFrame(render);
};