diff options
Diffstat (limited to '_shared/math/rectangle.js')
| -rw-r--r-- | _shared/math/rectangle.js | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/_shared/math/rectangle.js b/_shared/math/rectangle.js new file mode 100644 index 0000000..012c460 --- /dev/null +++ b/_shared/math/rectangle.js @@ -0,0 +1,32 @@ +/// <reference path="rigidbody2.js" /> + +function rectangle(pGl, pData) { + var lBuffer = pGl.createBuffer(), + lColor = pData.color || { x: 1, y: 0, z: 0, w: 1 }; + + pGl.bindBuffer(pGl.ARRAY_BUFFER, lBuffer); + + var lBufferedData = [ + -pData.width / 2.0, -pData.height / 2.0, lColor.x, lColor.y, lColor.z, lColor.w, + -pData.width / 2.0, pData.height / 2.0, lColor.x, lColor.y, lColor.z, lColor.w, + pData.width / 2.0, pData.height / 2.0, lColor.x, lColor.y, lColor.z, lColor.w, + pData.width / 2.0, pData.height /2.0, lColor.x, lColor.y, lColor.z, lColor.w, + pData.width / 2.0, -pData.height / 2.0, lColor.x, lColor.y, lColor.z, lColor.w, + -pData.width / 2.0, -pData.height / 2.0, lColor.x, lColor.y, lColor.z, lColor.w + ]; + + pGl.bufferData(pGl.ARRAY_BUFFER, new Float32Array(lBufferedData), pGl.STATIC_DRAW) + pGl.bindBuffer(pGl.ARRAY_BUFFER, undefined); + + pData.getMomentOfInertia = function() { + return (1.0 / 12.0) * pData.mass * (pData.height * pData.height + pData.width * pData.width); + }; + + return makeRigidBody2({ + vertexCount: 6, + buffer: lBuffer, + width: pData.width, + height: pData.height, + model: translateMatrix(mat4(), pData.position ? pData.position.x : 0, pData.position ? pData.position.y : 0, 0), + }, pData); +}
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