Geometry
I2Djs provides a way to define custom geometry using a set of inbuilt geometry APIs. Geometries are used along with custom shader to create out of the box effects.
I2Djs provides APIs for Mesh, line, and points geometry.
Mesh Geometry:
Used for rendering mesh geometrical polygons. Default drawType is 'TRIANGLES'. Possible values are 'TRIANGLES' , 'TRIANGLE_STRIP' and 'TRIANGLE_FAN'.
meshInstance = new MeshGeometry();
Example of Mesh Geometry:
meshInstance = new MeshGeometry();
geometry.setAttr('a_position', {
value: new Float32Array([]),
size: 2
});
geometry.setDrawRange(0, 6);
Line Geometry:
Used for rendering Line geometrical entities like lines, polylines. Default drayType is 'LINE'. Possible values are 'LINE', 'LINE_STRIP' and 'LINE_LOOP'.
lineInstance = new LineGeometry();
Example of Line Geometry :
lineInstance = new LineGeometry();
geometry.setAttr('a_position', {
value: new Float32Array([]),
size: 2
});
geometry.setDrawRange(0, 6);
Points Geometry:
Used in rendering points. Default drawType is 'POINT'.
geometry = new PointsGeometry();
Example of Points Geometry :
geometry = new PointsGeometry();
geometry.setAttr('a_color', {
value: new Float32Array([255,255,255,255]),
size: 4
});
geometry.setAttr('a_size', {
value: new Float32Array([10]),
size: 1
});
geometry.setAttr('a_position', {
value: new Float32Array([30,40]),
size: 2
});