src/camera.c

Thu, 28 Mar 2024 23:30:21 +0100

author
Mike Becker <universe@uap-core.de>
date
Thu, 28 Mar 2024 23:30:21 +0100
changeset 45
18de2af03531
parent 41
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child 47
44457f6cb0a2
permissions
-rw-r--r--

simplify how transforms work

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 * Copyright 2023 Mike Becker. All rights reserved.
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4 *
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5 * Redistribution and use in source and binary forms, with or without
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6 * modification, are permitted provided that the following conditions are met:
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7 *
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8 * 1. Redistributions of source code must retain the above copyright
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9 * notice, this list of conditions and the following disclaimer.
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10 *
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11 * 2. Redistributions in binary form must reproduce the above copyright
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12 * notice, this list of conditions and the following disclaimer in the
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13 * documentation and/or other materials provided with the distribution.
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14 *
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15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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25 * POSSIBILITY OF SUCH DAMAGE.
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26 */
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27
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28 #include "ascension/camera.h"
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29
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30 static void asc_camera_update_ortho(AscCamera *camera) {
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31 float left = (float) camera->rect.pos.x;
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32 float right = left + (float) camera->rect.size.width;
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33 float top = (float) camera->rect.pos.y;
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34 float bottom = top + (float) camera->rect.size.height;
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35 asc_mat4f_ortho(camera->projection, left, right, bottom, top, -1, 1);
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36 }
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37
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38 void asc_camera_ortho(AscCamera *camera, asc_recti rect) {
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39 asc_mat4f_unit(camera->view);
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40 camera->update = asc_camera_update_ortho;
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41 camera->rect = rect;
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42 }
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43
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44 void asc_camera_disable(AscCamera *camera) {
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45 camera->update = NULL;
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46 }

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