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cg1_tut_mdi
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add colour

This commit is contained in:
Luca Conte 2025-03-06 16:31:55 +01:00
parent bf6404cd85
commit 48d3d91aaa
2 changed files with 13 additions and 2 deletions
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11
src/script.js
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@ -152,6 +152,9 @@ async function draw() {
gl.useProgram(program); gl.useProgram(program);
let colorLocation = gl.getUniformLocation(program, "color");
gl.uniform3fv(colorLocation, hexColorToFloatArray("dc3c05"));
gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer); gl.bindBuffer(gl.ARRAY_BUFFER, vertexBuffer);
gl.drawArrays(gl.TRIANGLES, 0, vertices.length / 2); gl.drawArrays(gl.TRIANGLES, 0, vertices.length / 2);
@ -160,4 +163,12 @@ async function draw() {
requestAnimationFrame(draw); requestAnimationFrame(draw);
} }
function hexColorToFloatArray(hex) {
let r = parseInt(hex.substring(0, 2), 16) / 255;
let g = parseInt(hex.substring(2, 4), 16) / 255;
let b = parseInt(hex.substring(4, 6), 16) / 255;
return [r, g, b];
}
window.addEventListener("DOMContentLoaded", init); window.addEventListener("DOMContentLoaded", init);

4
src/shaders/vertex.glsl
View File

@ -1,10 +1,10 @@
precision mediump float; precision mediump float;
attribute vec2 vertPosition; attribute vec2 vertPosition;
attribute vec3 vertColor; uniform vec3 color;
varying vec3 fragColor; varying vec3 fragColor;
void main() { void main() {
fragColor = vertColor; fragColor = color;
gl_Position = vec4(vertPosition, 0.0, 1.0); gl_Position = vec4(vertPosition, 0.0, 1.0);
} }