54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
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#include <defocus/camera.h>
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#include <string.h>
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/* ********************************************************
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*
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* Ray Packet Functions
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*
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* ********************************************************/
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void df_release_ray_packet(df_ray_packet *rays)
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{
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free(rays->simd_mem);
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free(rays->ray_uvs);
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memset(rays, 0, sizeof(*rays));
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}
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/* ********************************************************
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*
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* Perspective Camrea
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*
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* ********************************************************/
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typedef struct
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{
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float focal_dist;
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float lens_radius;
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df_m4 screen_to_raster;
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df_m4 raster_to_screen;
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df_m4 raster_to_camera;
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} df_perspective_camera;
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static void pc_release(void *o) { df_perspective_camera *camera = o; }
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static df_ray_packet pc_build_ray_packet(void *o) { df_perspective_camera *camera = o; }
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df_camera_i df_create_perspective_camera(float image_width, float image_height, float raster_width, float raster_height)
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{
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df_perspective_camera *camera = malloc(sizeof(*camera));
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camera->screen_to_raster = df_scale(raster_width, raster_height, 1.f);
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camera->screen_to_raster =
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df_mul_m4(camera->screen_to_raster, df_scale(1.f / image_width, -1.f / image_height, 1.f));
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camera->screen_to_raster = df_mul_m4(camera->screen_to_raster, df_translate(0.f, -image_height, 0.f));
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camera->raster_to_screen = df_inverse_transform(camera->screen_to_raster);
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df_camera_i iface = {.release = pc_release, .build_ray_packet = pc_build_ray_packet, .o = camera};
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return iface;
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}
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