spine-sys 0.1.1

Placeholder for spine workspace
Documentation 
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/******************************************************************************
 * Spine Runtimes License Agreement
 * Last updated January 1, 2020. Replaces all prior versions.
 *
 * Copyright (c) 2013-2020, Esoteric Software LLC
 *
 * Integration of the Spine Runtimes into software or otherwise creating
 * derivative works of the Spine Runtimes is permitted under the terms and
 * conditions of Section 2 of the Spine Editor License Agreement:
 * http://esotericsoftware.com/spine-editor-license
 *
 * Otherwise, it is permitted to integrate the Spine Runtimes into software
 * or otherwise create derivative works of the Spine Runtimes (collectively,
 * "Products"), provided that each user of the Products must obtain their own
 * Spine Editor license and redistribution of the Products in any form must
 * include this license and copyright notice.
 *
 * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "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 ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
 * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) 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
 * THE SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/

#include <spine/PointAttachment.h>
#include <spine/extension.h>

void _spPointAttachment_dispose (spAttachment* attachment) {
	spPointAttachment* self = SUB_CAST(spPointAttachment, attachment);
	_spAttachment_deinit(attachment);
	FREE(self);
}

spAttachment* _spPointAttachment_copy (spAttachment* attachment) {
	spPointAttachment* self = SUB_CAST(spPointAttachment, attachment);
	spPointAttachment* copy = spPointAttachment_create(attachment->name);
	copy->x = self->x;
	copy->y = self->y;
	copy->rotation = self->rotation;
	spColor_setFromColor(&copy->color, &self->color);
	return SUPER(copy);
}

spPointAttachment* spPointAttachment_create (const char* name) {
	spPointAttachment* self = NEW(spPointAttachment);
	_spAttachment_init(SUPER(self), name, SP_ATTACHMENT_POINT, _spPointAttachment_dispose, _spPointAttachment_copy);
	return self;
}

void spPointAttachment_computeWorldPosition (spPointAttachment* self, spBone* bone, float* x, float* y) {
	*x = self->x * bone->a + self->y * bone->b + bone->worldX;
	*y = self->x * bone->c + self->y * bone->d + bone->worldY;
}

float spPointAttachment_computeWorldRotation (spPointAttachment* self, spBone* bone) {
	float cosine, sine, x, y;
	cosine = COS_DEG(self->rotation);
	sine = SIN_DEG(self->rotation);
	x = cosine * bone->a + sine * bone->b;
	y = cosine * bone->c + sine * bone->d;
	return ATAN2(y, x) * RAD_DEG;
}