192 lines
3.2 KiB
C++
192 lines
3.2 KiB
C++
/**
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* @file llviewertextureanim.cpp
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* @brief LLViewerTextureAnim class implementation
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*
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* Copyright (c) 2003-$CurrentYear$, Linden Research, Inc.
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* $License$
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*/
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#include "llviewerprecompiledheaders.h"
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#include "llviewertextureanim.h"
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#include "llmath.h"
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#include "llerror.h"
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LLViewerTextureAnim::LLViewerTextureAnim() : LLTextureAnim()
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{
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mLastFrame = -1.f; // Force an update initially
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mLastTime = 0.f;
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}
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LLViewerTextureAnim::~LLViewerTextureAnim()
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{
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}
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void LLViewerTextureAnim::reset()
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{
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LLTextureAnim::reset();
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mTimer.reset();
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}
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S32 LLViewerTextureAnim::animateTextures(F32 &off_s, F32 &off_t,
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F32 &scale_s, F32 &scale_t,
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F32 &rot)
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{
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S32 result = 0;
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if (!(mMode & ON))
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{
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mLastTime = 0.f;
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mLastFrame = -1.f;
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return result;
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}
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F32 num_frames = 1.0;
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F32 full_length = 1.0;
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if (mLength)
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{
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num_frames = mLength;
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}
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else
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{
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num_frames = llmax(1.f, (F32)(mSizeX * mSizeY));
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}
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if (mMode & PING_PONG)
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{
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if (mMode & SMOOTH)
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{
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full_length = 2.f*num_frames;
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}
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else if (mMode & LOOP)
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{
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full_length = 2.f*num_frames - 2.f;
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full_length = llmax(1.f, full_length);
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}
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else
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{
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full_length = 2.f*num_frames - 1.f;
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full_length = llmax(1.f, full_length);
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}
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}
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else
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{
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full_length = num_frames;
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}
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F32 frame_counter;
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if (mMode & SMOOTH)
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{
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frame_counter = mTimer.getElapsedTimeAndResetF32() * mRate + (F32)mLastTime;
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}
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else
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{
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frame_counter = mTimer.getElapsedTimeF32() * mRate;
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}
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mLastTime = frame_counter;
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if (mMode & LOOP)
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{
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frame_counter = fmod(frame_counter, full_length);
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}
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else
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{
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frame_counter = llmin(full_length - 1.f, frame_counter);
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}
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if (!(mMode & SMOOTH))
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{
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frame_counter = (F32)llfloor(frame_counter + 0.01f);
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}
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if (mMode & PING_PONG)
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{
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if (frame_counter >= num_frames)
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{
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if (mMode & SMOOTH)
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{
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frame_counter = num_frames - (frame_counter - num_frames);
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}
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else
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{
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frame_counter = (num_frames - 1.99f) - (frame_counter - num_frames);
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}
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}
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}
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if (mMode & REVERSE)
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{
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if (mMode & SMOOTH)
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{
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frame_counter = num_frames - frame_counter;
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}
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else
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{
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frame_counter = (num_frames - 0.99f) - frame_counter;
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}
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}
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frame_counter += mStart;
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if (!(mMode & SMOOTH))
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{
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frame_counter = (F32)llround(frame_counter);
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}
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//
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// Now that we've calculated the frame time, do an update.
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// Will we correctly update stuff if the texture anim has
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// changed, but not the frame counter?
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//
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if (mLastFrame != frame_counter)
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{
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mLastFrame = frame_counter;
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if (mMode & ROTATE)
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{
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result |= ROTATE;
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rot = frame_counter;
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}
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else if (mMode & SCALE)
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{
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result |= SCALE;
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scale_s = frame_counter;
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scale_t = frame_counter;
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}
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else
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{
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result |= TRANSLATE;
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F32 x_frame;
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S32 y_frame;
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F32 x_pos;
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F32 y_pos;
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if ( (mSizeX)
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&&(mSizeY))
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{
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result |= SCALE;
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scale_s = 1.f/mSizeX;
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scale_t = 1.f/mSizeY;
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x_frame = fmod(frame_counter, mSizeX);
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y_frame = (S32)(frame_counter / mSizeX);
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x_pos = x_frame * scale_s;
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y_pos = y_frame * scale_t;
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off_s = (-0.5f + 0.5f*scale_s)+ x_pos;
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off_t = (0.5f - 0.5f*scale_t) - y_pos;
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}
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else
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{
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scale_s = 1.f;
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scale_t = 1.f;
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x_pos = frame_counter * scale_s;
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off_s = (-0.5f + 0.5f*scale_s)+ x_pos;
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off_t = 0.f;
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}
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}
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}
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return result;
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}
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