Starting a grass demo.

demos/grass.js

@@ -0,0 +1,68 @@
+global.randar = require('../');
+
+global.ctx    = new randar.GraphicsContext();
+global.win    = ctx.window(800, 600);
+global.camera = win.camera();
+
+camera.projection();
+camera.position(randar.vector(10, 10, 10));
+camera.target(randar.vector(0, 0, 0));
+
+function generateBlade(model, width, height, depth) {
+    let layers = 24;
+    let layerHeight = height / layers;
+
+    let geo = model.geometry();
+    for (let i = 0; i < layers; i++) {
+        let vertex = randar.vertex()//.withJoint(0, 255)//.withJoint(0, (i / layers) * 255);
+        let h = layerHeight * i;
+
+        let opt = { };
+
+        opt.frontBottomLeft  = vertex.withPosition(0, h, 0);
+        opt.frontBottomRight = vertex.withPosition(width, h, 0);
+        opt.backBottomLeft   = vertex.withPosition(0, h, depth);
+        opt.backBottomRight  = vertex.withPosition(width, h, depth);
+
+        vertex = vertex//.withJoint(0, 255)//.withJoint(0, ((i + 1) / layers) * 255);
+        h = layerHeight * (i + 1);
+
+        opt.frontTopLeft     = vertex.withPosition(0, h, 0);
+        opt.frontTopRight    = vertex.withPosition(width, h, 0);
+        opt.backTopLeft      = vertex.withPosition(0, h, depth);
+        opt.backTopRight     = vertex.withPosition(width, h, depth);
+
+        geo.append(randar.generate.cuboid(opt));
+    }
+
+   // model.skeleton().add('tip');
+    return model;
+}
+
+let geometries = [];
+let skeletons  = [];
+let models     = [];
+
+for (let i = 0; i < 1; i++) {
+    models.push(randar.model());
+    geometries.push(randar.geometry());
+    //skeletons.push(randar.skeleton());
+
+    models[i].geometry(geometries[i]);
+    //models[i].skeleton(skeletons[i]);
+
+    generateBlade(models[i], 1, 24, 1);
+}
+
+setInterval(() => {
+    camera.move(
+        randar.vector(0, 1, 0),
+        randar.angle(0.01)
+    );
+
+    win.clear();
+    for (let i = 0; i < models.length; i++) {
+        win.draw(models[i]);
+    }
+    win.present();
+}, 0);