Updated the sidebar for usability's sake

1 files changed, 23 insertions, 0 deletions

diff --git a/frontend/_shared/math/collision.js b/frontend/_shared/math/collision.js
new file mode 100644
index 0000000..74ec5d8
--- /dev/null
+++ b/frontend/_shared/math/collision.js
@@ -0,0 +1,23 @@
+/// <reference path="vec2.js" />
+/// <reference path="line2.js" />
+/// <reference path="circle.js" />
+/// <reference path="mat4.js" />
+
+/**
+ * 
+ * @param {circle} pCricle 
+ * @param {line2} pLine 
+ */
+function lineCircleCollision2(pCricle, pLine) {
+    // We have a triangle formed by circle's position P and the two points of the line, A and B.
+    var lSlope = (pCricle.position.y - pLine.start.y) / (pCricle.position.x - pLine.start.x),
+        lAngle = Math.atan(lSlope),
+        lAngleDiff = lAngle - pLine.angle,
+        lPositionToStart = subVec2(pCricle.position, pLine.start),
+        lPosToStartLength = length2(lPositionToStart),
+        lHeight = lPosToStartLength * Math.sin(lAngleDiff);
+
+    if (Math.abs(lHeight - pCricle.radius) < pCricle.radius) {
+        console.log('Intersection');
+    }
+}
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