Map the mouse x,y coordinates to a point on a sphere
| 74 | |
| 75 | // Map the mouse x,y coordinates to a point on a sphere |
| 76 | bool Scene::mapMouseCoordinatesToSphere(double xMouse, double yMouse, |
| 77 | Vector3& spherePoint) const { |
| 78 | |
| 79 | if ((xMouse >= 0) && (xMouse <= mWindowWidth) && (yMouse >= 0) && (yMouse <= mWindowHeight)) { |
| 80 | float x = float(xMouse - 0.5f * mWindowWidth) / float(mWindowWidth); |
| 81 | float y = float(0.5f * mWindowHeight - yMouse) / float(mWindowHeight); |
| 82 | float sinx = std::sin(PI * x * 0.5f); |
| 83 | float siny = std::sin(PI * y * 0.5f); |
| 84 | float sinx2siny2 = sinx * sinx + siny * siny; |
| 85 | |
| 86 | // Compute the point on the sphere |
| 87 | spherePoint.x = sinx; |
| 88 | spherePoint.y = siny; |
| 89 | spherePoint.z = (sinx2siny2 < 1.0f) ? std::sqrt(1.0f - sinx2siny2) : 0.0f; |
| 90 | |
| 91 | return true; |
| 92 | } |
| 93 | |
| 94 | return false; |
| 95 | } |
| 96 | |
| 97 | // Called when a mouse button event occurs |
| 98 | bool Scene::mouseButtonEvent(int /*button*/, bool down, int /*mods*/, double mousePosX, double mousePosY) { |
nothing calls this directly
no outgoing calls
no test coverage detected