spine-runtimes/spine-c/src/spine/RegionAttachment.c
2013-03-31 20:09:37 +02:00

69 lines
2.9 KiB
C

/*******************************************************************************
* Copyright (c) 2013, Esoteric Software
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
#include <spine/RegionAttachment.h>
#include <math.h>
#include <spine/extension.h>
void _RegionAttachment_init (RegionAttachment* self, const char* name) {
self->scaleX = 1;
self->scaleY = 1;
_Attachment_init(SUPER(self), name, ATTACHMENT_REGION);
}
void _RegionAttachment_deinit (RegionAttachment* self) {
_Attachment_deinit(SUPER(self));
}
void RegionAttachment_updateOffset (RegionAttachment* self) {
float localX2 = self->width / 2;
float localY2 = self->height / 2;
float localX = -localX2;
float localY = -localY2;
localX *= self->scaleX;
localY *= self->scaleY;
localX2 *= self->scaleX;
localY2 *= self->scaleY;
float radians = (float)(self->rotation * 3.1415926535897932385 / 180);
float cosine = cosf(radians);
float sine = sinf(radians);
float localXCos = localX * cosine + self->x;
float localXSin = localX * sine;
float localYCos = localY * cosine + self->y;
float localYSin = localY * sine;
float localX2Cos = localX2 * cosine + self->x;
float localX2Sin = localX2 * sine;
float localY2Cos = localY2 * cosine + self->y;
float localY2Sin = localY2 * sine;
self->offset[0] = localXCos - localYSin;
self->offset[1] = localYCos + localXSin;
self->offset[2] = localXCos - localY2Sin;
self->offset[3] = localY2Cos + localXSin;
self->offset[4] = localX2Cos - localY2Sin;
self->offset[5] = localY2Cos + localX2Sin;
self->offset[6] = localX2Cos - localYSin;
self->offset[7] = localYCos + localX2Sin;
}