From 0c6d978442b244ca3f29c1ffdd44b5007ae7ad93 Mon Sep 17 00:00:00 2001
From: Ilion Beyst <ilion.beyst@gmail.com>
Date: Wed, 29 Dec 2021 21:24:57 +0100
Subject: separate out visualizer library

---
 web/pw-visualizer/src/webgl/buffer.ts | 55 +++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 web/pw-visualizer/src/webgl/buffer.ts

(limited to 'web/pw-visualizer/src/webgl/buffer.ts')

diff --git a/web/pw-visualizer/src/webgl/buffer.ts b/web/pw-visualizer/src/webgl/buffer.ts
new file mode 100644
index 0000000..2739fbe
--- /dev/null
+++ b/web/pw-visualizer/src/webgl/buffer.ts
@@ -0,0 +1,55 @@
+
+export class Buffer {
+    buffer: WebGLBuffer;
+    data: any;
+    count: number;
+    type: number;
+
+    constructor(gl: WebGLRenderingContext, data: number[], type: number) {
+        this.buffer = gl.createBuffer();
+        this.type = type;
+
+        if (data)
+            this.updateData(gl, data);
+    }
+
+    _toArray(data: number[]): any {
+        return new Float32Array(data);
+    }
+
+    updateData(gl: WebGLRenderingContext, data: number[]) {
+        this.data = data;
+        this.count = data.length;
+        gl.bindBuffer(this.type, this.buffer);
+        gl.bufferData(this.type, this._toArray(data), gl.STATIC_DRAW);
+    }
+
+    bind(gl: WebGLRenderingContext) {
+        gl.bindBuffer(this.type, this.buffer);
+    }
+
+    getCount(): number {
+        return this.count;
+    }
+}
+
+export class VertexBuffer extends Buffer {
+    constructor(gl: WebGLRenderingContext, data: any) {
+        super(gl, data, gl.ARRAY_BUFFER);
+    }
+
+    _toArray(data: number[]): any {
+        return new Float32Array(data);
+    }
+}
+
+
+export class IndexBuffer extends Buffer {
+    constructor(gl: WebGLRenderingContext, data: any) {
+        super(gl, data, gl.ELEMENT_ARRAY_BUFFER);
+    }
+
+    _toArray(data: number[]): any {
+        return new Uint16Array(data);
+    }
+}
-- 
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