Misaki
9cc420693c
Added quaternion and vector structures from the cglm library for handling 3D rotations and directions. Added a new function `euler_to_quat` to convert Euler angles to a quaternion representation. Changed the `camera_t` structure to replace separate forward, up, and right vectors with a single rotation quaternion. Changed the `camera_create` function to accept a rotation quaternion instead of separate direction vectors. Changed the `scene_init` function to initialize the camera with a default rotation quaternion. Changed the `ensure_camera_aspect_ratio` function to maintain the camera's rotation quaternion. Changed the `screen_render_pixel`, `scene_render_tile`, and `scene_render` functions to compute camera coordinates based on the quaternion rotation.
58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
#ifndef COMMON_H
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#define COMMON_H
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#include "cglm/struct/quat.h"
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#include "cglm/struct/vec4.h"
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#include "cglm/struct/vec3.h"
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#include <math.h>
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#define RAY_EPSILON 5.192092896e-05F
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#define COLOR_CLAMP(color) (unsigned char)fminf(fmaxf(color, 0.0f), 255.0f)
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#define BIAS_RAY_ORIGION(positon, normal) glms_vec3_add(positon, glms_vec3_scale(normal, RAY_EPSILON))
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inline float random_float()
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{
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return (float)rand() / (float)RAND_MAX;
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}
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inline uint32_t hash_uint32(uint32_t x) {
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x = ((x >> 16) ^ x) * 0x45d9f3b;
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x = ((x >> 16) ^ x) * 0x45d9f3b;
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x = (x >> 16) ^ x;
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return x;
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}
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inline bool has_flag(int flags, int flag)
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{
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return (flags & flag) != 0;
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}
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inline versors euler_to_quat(float x, float y, float z)
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{
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versors qx = glms_quatv(glm_rad(x), (vec3s){1.0f, 0.0f, 0.0f});
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versors qy = glms_quatv(glm_rad(y), (vec3s){0.0f, 1.0f, 0.0f});
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versors qz = glms_quatv(glm_rad(z), (vec3s){0.0f, 0.0f, 1.0f});
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return glms_quat_mul(glms_quat_mul(qz, qy), qx);
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}
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inline vec3s quat_get_forward(versors quat)
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{
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vec3s forward = glms_quat_rotatev(quat, (vec3s){0.0f, 0.0f, -1.0f});
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return forward;
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}
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inline vec3s quat_get_up(versors quat)
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{
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return glms_quat_rotatev(quat, (vec3s){0.0f, 1.0f, 0.0f});
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}
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inline vec3s quat_get_right(versors quat)
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{
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return glms_quat_rotatev(quat, (vec3s){1.0f, 0.0f, 0.0f});
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}
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#endif // COMMON_H
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