2020年5月18日 (一) 08:49 Wzc

2020-05-18T08:49:28Z

Wzc：创建页面，内容为“{{LSL Header|ml=*}}{{LSLC|Keywords}}{{LSLC|Flow Control}}{{LSLC|}} {{函数详情 |函数名=Function: float llAngleBetween( rotation a, rotation b ); |参数=…”

2020-05-18T08:47:15Z

创建页面，内容为“{{LSL Header|ml=*}}{{LSLC|Keywords}}{{LSLC|Flow Control}}{{LSLC|}} {{函数详情 |函数名=Function: float llAngleBetween( rotation a, rotation b ); |参数=…”

新页面

{{LSL Header|ml=*}}{{LSLC|Keywords}}{{LSLC|Flow Control}}{{LSLC|}}

{{函数详情
|函数名=Function: float llAngleBetween( rotation a, rotation b );
|参数= 参数：返回一个浮点数，它是旋转a和旋转b之间的弧度角。

|返回值=
•旋转a–开始旋转
•旋转b–结束旋转

|注意事项=重要问题~[[Search JIRA for related Bugs]]

|示例=
<pre>
default
{
touch_start(integer num_detected)
{
rotation currentRootRotation = llGetRootRotation();
float angle = llAngleBetween(ZERO_ROTATION, currentRootRotation);

// PUBLIC_CHANNEL has the integer value 0
llSay(PUBLIC_CHANNEL,
"llAngleBetween(ZERO_ROTATION, " + (string)currentRootRotation + ") = " + (string)angle);
}
}
</pre>

|相关函数= •[[llRotBetween]]•[[llRot2Angle]]

|相关事件=

== 参考 ==
float AngleBetween(rotation a, rotation b)//simple but turns out to not be very accurate.
{
return 2.0 * llAcos( llFabs(a.x * b.x + a.y * b.y + a.z * b.z + a.s * b.s)
/ llSqrt((a.x * a.x + a.y * a.y + a.z * a.z + a.s * a.s)
* (b.x * b.x + b.y * b.y + b.z * b.z + b.s * b.s)));
}
float AngleBetween(rotation a, rotation b)//more complex implementation but more accurate, and reasonably fast.
{
rotation r = b / a; // calculate the rotation between the two arguments as quaternion
float s2 = r.s * r.s; // square of the s-element
float v2 = r.x * r.x + r.y * r.y + r.z * r.z; // sum of the squares of the v-elements

if (s2 < v2) // compare the s-component to the v-component
return 2.0 * llAcos(llSqrt(s2 / (s2 + v2))); // use arccos if the v-component is dominant
if (v2) // make sure the v-component is non-zero
return 2.0 * llAsin(llSqrt(v2 / (s2 + v2))); // use arcsin if the s-component is dominant

return 0.0; // one or both arguments are scaled too small to be meaningful, or the values are the same, so return zero
}//Written by Moon Metty & Miranda Umino. Minor optimizations by Strife Onizuka

}}

@@ 第33行： / 第33行： @@
 == 参考 ==
 float AngleBetween(rotation a, rotation b)//simple but turns out to not be very accurate.
+{
      return 2.0 * llAcos( llFabs(a.x * b.x + a.y * b.y + a.z * b.z + a.s * b.s)
@@ 第40行： / 第42行： @@
+}
 float AngleBetween(rotation a, rotation b)//more complex implementation but more accurate, and reasonably fast.
+{
      rotation r = b / a; // calculate the rotation between the two arguments as quaternion

LlAngleBetween - 版本历史

2020年5月18日 (一) 08:49 Wzc

Wzc：创建页面，内容为“{{LSL Header|ml=*}}{{LSLC|Keywords}}{{LSLC|Flow Control}}{{LSLC|}} {{函数详情 |函数名=Function: float llAngleBetween( rotation a, rotation b ); |参数=…”