ascension: src/ascension/transform.h@18de2af03531 (annotated)

src/ascension/transform.h@18de2af03531 (annotated)

src/ascension/transform.h

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 32: 86468a71dd73
permissions: -rw-r--r--

simplify how transforms work

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  * Copyright 2023 Mike Becker. 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 HOLDER 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.
  */
 #ifndef ASCENSION_TRANSFORM_H
 #define ASCENSION_TRANSFORM_H
 #include "datatypes.h"
 typedef asc_mat4f asc_transform;
 #define ASC_TRANSFORM_SIZE (sizeof(float)*16)
 #ifdef __GNUC__
 #define ASC_TRANFORM_FUNC_ATTRIBUTES \
     __attribute__((__nonnull__, __always_inline__))
 #else
 #define ASC_TRANFORM_FUNC_ATTRIBUTES
 #endif
 #define ASC_TRANFORM_FUNC ASC_TRANFORM_FUNC_ATTRIBUTES static inline
 ASC_TRANFORM_FUNC void asc_transform_identity(asc_transform transform) {
     memset(transform, 0, ASC_TRANSFORM_SIZE);
     transform[asc_mat4_index(0, 0)] = 1;
     transform[asc_mat4_index(1, 1)] = 1;
     transform[asc_mat4_index(2, 2)] = 1;
     transform[asc_mat4_index(3, 3)] = 1;
 }
 ASC_TRANFORM_FUNC void asc_transform_copy(asc_transform dest, asc_transform src) {
     memcpy(dest, src, ASC_TRANSFORM_SIZE);
 }
 ASC_TRANFORM_FUNC void asc_transform_translate(
         asc_transform transform,
         asc_vec3f vec
 ) {
     transform[asc_mat4_index(3, 0)] += vec.x;
     transform[asc_mat4_index(3, 1)] += vec.y;
     transform[asc_mat4_index(3, 2)] += vec.z;
 }
 ASC_TRANFORM_FUNC void asc_transform_scale(
         asc_transform transform,
         asc_vec3f vec
 ) {
     for (unsigned i = 0 ; i < 3 ; i++) {
         transform[asc_mat4_index(0, i)] *= vec.width;
         transform[asc_mat4_index(1, i)] *= vec.height;
         transform[asc_mat4_index(2, i)] *= vec.depth;
     }
 }
 ASC_TRANFORM_FUNC void asc_transform_rotate(
         asc_transform transform,
         asc_vec3f vec
 ) {
     // TODO: implement
 }
 ASC_TRANFORM_FUNC void asc_transform_from_parts(
         asc_transform transform,
         asc_vec3f position,
         asc_vec3f scale,
         asc_vec3f rotation
 ) {
     asc_transform_identity(transform);
     asc_transform_scale(transform, scale);
     asc_transform_translate(transform, position);
     asc_transform_rotate(transform, rotation);
 }
 #endif //ASCENSION_TRANSFORM_H

Mercurial > hg > ascension / annotate

src/ascension/transform.h@18de2af03531 (annotated)

src/ascension/transform.h