Thomas Pallis

Thanks, and that is sad news. I had solved the problem for planar mapping, but I was hoping I'd be able to do it for a the default repeat mapping since that addresses another issue I was having with sloped surfaces and the dimensions of the face. The application I'm working on displays a texture on the top face of an object. A secondary object is rezzed on top of the first and picks up the texture from the object under it and displays the portion of the texture that it would otherwise obscure. (the image below is using planar mapping.)

I'm getting the distortion on the face using a square prim as well. However, in the case of a square prim if I lock the repeats at 1:1 I do get the behavior I'm looking for.

That may be the way to go @Love Zhaoying. Perform the rotation against the aspect ratio of the texture (1:1 or <1, 1, 0>) and then adjust the result against the ratio of the sides of the prim. /me toddles off to try it and will report back.

This problem has been driving me crazy for over a week now, so perhaps someone here can lend me a few brain cells. I am trying to set the rotation of a texture on the face of a prim using llSetLinkPrimitiveParamsFast while maintaining its aspect ratio. When the rotation is 0°, the long side of the prim face should have a texture repeat of 1, and the short side of the prim face should have a repeat short/long. As the the texture is rotated I would like it maintain its aspect ratio. This requires that I change the horizontal and vertical repeats to account for the texture rotation. I have a partial solution that works for the cardinal directions (0, 90, 180, 270). But the texture becomes distorted as it rotates between these points. How do I maintain the aspect ratio of the texture as it is rotated? Here are some images that demonstrate what I'm seeing. The texture rotation at 0 and 90 degrees. Texture rotation at 45 and 22.5 degrees. And here is my code so far fixTexture() { list params = llGetLinkPrimitiveParams(LINK_THIS, [ PRIM_TEXTURE, 0 ]); string texture = "90cd268c-d657-0b36-238c-5e39ed7929c4"; //llList2String(params, 0); vector repeats = <1, 1, 0>; // actual repeats calculated below. vector offsets = llList2Vector(params, 2); float zrot = llList2Float(params, 3); rotation texture_rot = llEuler2Rot(<0, 0, zrot>); vector dims = llGetScale(); // we want the X/Y of the prim dims.z = 0; // we don't care about z. // The larger dim determines our actual number of repeats. // I want 1 repeat across the larger of X or Y, the other // is some fraction of 1. if (dims.x > dims.y) repeats.y = dims.y / dims.x; else if (dims.y > dims.x) repeats.x = dims.x / dims.y; // this is what's missing *something* // It works at the cardinal points (0, 90, 180, 270), but // stretches in between. Wost distortion at 22.5 repeats = repeats * texture_rot; repeats.x = llFabs(repeats.x); repeats.y = llFabs(repeats.y); //llOwnerSay("repeats now: " + (string)repeats); llSetLinkPrimitiveParamsFast(LINK_THIS, [ PRIM_TEXTURE, 0, texture, repeats, offsets, zrot ]); integer degrees = (integer)(zrot * RAD_TO_DEG); llSetText((string)degrees + "°\n" + (string)repeats, <1,1,1>, 1); } integer STARTED = FALSE; default { state_entry() { STARTED = TRUE; llSetTimerEvent(0.1); } touch_start(integer total_number) { fixTexture(); STARTED = !STARTED; if (STARTED) llSetTimerEvent(0.1); else llSetTimerEvent(0); } timer() { fixTexture(); } }

Perhaps invest in one of these?