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helpers.lisp
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helpers.lisp
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(in-package #:org.shirakumo.fraf.trial)
(defclass transformed () ())
(defclass renderable () ())
(defmethod update-instance-for-different-class :after ((prev renderable) (renderable renderable) &rest args)
(declare (ignore args))
(when (and +main+ (slot-boundp +main+ 'scene) (scene +main+))
(handle (make-event 'instance-class-changed :instance renderable) +main+)))
(defclass dynamic-renderable (renderable) ())
(defgeneric global-location (entity &optional target))
(defgeneric global-bsize (entity &optional target))
;; Returns (MIN . MAX)
(defgeneric global-bbox (entity))
(defmethod global-bbox (object)
(let ((location (global-location object))
(bsize (global-bsize object)))
(cons (v- location bsize)
(v+ location bsize))))
(defclass located-entity (transformed entity)
((location :initarg :location :initform (vec 0 0 0) :reader location :reader 3ds:location)))
(defmethod (setf location) ((vec vec3) (obj located-entity))
(v<- (location obj) vec))
(defmethod apply-transforms progn ((obj located-entity))
(translate (location obj)))
(define-transfer located-entity location)
(defclass sized-entity (entity)
((bsize :initarg :bsize :initform (vec 0 0 0) :accessor bsize :reader 3ds:bsize)))
(defmethod global-bsize ((entity sized-entity) &optional (target (vec3)))
(with-pushed-matrix ()
(apply-transforms entity)
(v<- target (bsize entity))
(n*m4/3 *model-matrix* target)))
(define-transfer sized-entity bsize)
(defclass oriented-entity (transformed entity)
((orientation :initarg :orientation :initform (vec 1 0 0) :accessor orientation)
(up :initarg :up :initform (vec 0 1 0) :accessor up)))
(defmethod apply-transforms progn ((obj oriented-entity))
(rotate (vc (up obj) (orientation obj))
(* 180 (/ (acos (v. (up obj) (orientation obj))) PI))))
(define-transfer oriented-entity orientation)
(defclass rotated-entity (transformed entity)
((rotation :initarg :rotation :initform (quat) :accessor rotation)))
(defmethod apply-transforms progn ((obj rotated-entity))
(let ((mat (mat4)))
(declare (dynamic-extent mat))
(nm* (model-matrix) (qmat (rotation obj) mat))))
(define-transfer rotated-entity rotation)
(defclass axis-rotated-entity (transformed entity)
((axis :initarg :axis :initform (vec 0 1 0) :accessor axis)
(angle :initarg :angle :initform 0 :accessor angle)))
(defmethod apply-transforms progn ((obj axis-rotated-entity))
(rotate (axis obj) (angle obj)))
(define-transfer axis-rotated-entity axis angle)
(defclass pivoted-entity (transformed entity)
((pivot :initarg :pivot :initform (vec 0 0 0) :accessor pivot)))
(defmethod apply-transforms progn ((obj pivoted-entity))
(translate (pivot obj)))
(define-transfer pivoted-entity pivot)
(defclass scaled-entity (transformed entity)
((scaling :initarg :scaling :initform (vec 1 1 1) :accessor scaling)))
(defmethod apply-transforms progn ((obj scaled-entity))
(scale (scaling obj)))
(define-transfer scaled-entity scaling)
(defclass transformed-entity (transformed entity)
((transform :initarg :transform :initform (transform) :reader tf)))
(defmethod shared-initialize :after ((entity transformed-entity) slots &key location scaling orientation)
(when location (setf (location entity) location))
(when scaling (setf (scaling entity) scaling))
(when orientation (setf (orientation entity) orientation)))
(defmethod apply-transforms progn ((obj transformed-entity))
(let ((mat (mat4)))
(declare (dynamic-extent mat))
(nm* (model-matrix) (tmat (tf obj) mat))))
(define-transfer transformed-entity tf)
(defmethod (setf tf) ((tf transform) (obj transformed-entity))
(t<- (tf obj) tf))
(defmethod (setf tf) ((mat mat4) (obj transformed-entity))
(!tfrom-mat (tf obj) mat))
(defmethod location ((tf transform))
(tlocation tf))
(defmethod location ((obj transformed-entity))
(tlocation (tf obj)))
(defmethod 3ds:location ((obj transformed-entity))
(tlocation (tf obj)))
(defmethod (setf location) ((vec vec3) (obj transformed-entity))
(v<- (tlocation (tf obj)) vec))
(defmethod scaling ((tf transform))
(tscaling tf))
(defmethod scaling ((obj transformed-entity))
(tscaling (tf obj)))
(defmethod (setf scaling) ((vec vec3) (obj transformed-entity))
(v<- (tscaling (tf obj)) vec))
(defmethod (setf scaling) ((value real) (obj transformed-entity))
(vsetf (tscaling (tf obj)) value value value))
(defmethod orientation ((tf transform))
(trotation tf))
(defmethod orientation ((obj transformed-entity))
(trotation (tf obj)))
(defmethod (setf orientation) ((quat quat) (obj transformed-entity))
(q<- (trotation (tf obj)) quat))
(defmethod axis ((obj transformed-entity))
(qaxis (trotation (tf obj))))
(defmethod (setf axis) ((axis vec3) (obj transformed-entity))
(setf (trotation (tf obj)) (qfrom-angle axis (angle obj))))
(defmethod angle ((obj transformed-entity))
(qangle (trotation (tf obj))))
(defmethod (setf angle) (angle (obj transformed-entity))
(setf (trotation (tf obj)) (qfrom-angle (axis obj) angle)))
(define-shader-entity fullscreen-entity (renderable)
())
(defmethod stage :after ((entity fullscreen-entity) (area staging-area))
(stage (// 'trial 'fullscreen-square) area))
(defmethod render ((entity fullscreen-entity) (program shader-program))
(declare (optimize speed))
(render-array (// 'trial 'fullscreen-square)))
(define-class-shader (fullscreen-entity :vertex-shader)
"layout (location = 0) in vec3 position;
void main(){
maybe_call_next_method();
gl_Position = vec4(position, 1.0f);
}")
(define-shader-entity vertex-entity (renderable)
((vertex-array :initarg :vertex-array :accessor vertex-array)))
(defmethod stage :after ((entity vertex-entity) (area staging-area))
(when (slot-boundp entity 'vertex-array)
(stage (vertex-array entity) area)))
(defmethod render ((entity vertex-entity) (program shader-program))
(declare (optimize speed))
(setf (uniform program "model_matrix") (model-matrix))
(setf (uniform program "view_matrix") (view-matrix))
(setf (uniform program "projection_matrix") (projection-matrix))
(render (vertex-array entity) program))
(define-class-shader (vertex-entity :vertex-shader)
"layout (location = 0) in vec3 position;
uniform mat4 model_matrix;
uniform mat4 view_matrix;
uniform mat4 projection_matrix;
out vec3 v_world_position;
out vec3 v_view_position;
void main(){
maybe_call_next_method();
vec4 world_position = model_matrix * vec4(position, 1.0f);
vec4 view_position = view_matrix * world_position;
gl_Position = projection_matrix * view_position;
v_world_position = world_position.xyz;
v_view_position = view_position.xyz;
}")
(define-transfer vertex-entity vertex-array)
(define-shader-entity colored-entity ()
((color :initform (vec 0 0 1 1) :reader color)))
(defmethod shared-initialize :after ((entity colored-entity) slots &key color)
(when color (setf (color entity) color)))
(defmethod (setf color) ((color vec3) (entity colored-entity))
(setf (color entity) (vec4 (vx color) (vy color) (vz color) 1)))
(defmethod (setf color) ((color vec4) (entity colored-entity))
(setf (slot-value entity 'color) color))
(defmethod render :before ((obj colored-entity) (program shader-program))
(setf (uniform program "objectcolor") (color obj)))
(define-class-shader (colored-entity :fragment-shader)
"uniform vec4 objectcolor;
out vec4 color;
void main(){
maybe_call_next_method();
color *= objectcolor;
}")
(define-transfer colored-entity color)
(define-shader-entity vertex-colored-entity ()
())
(define-class-shader (vertex-colored-entity :vertex-shader)
"layout (location = 4) in vec4 in_vertexcolor;
out vec4 vertexcolor;
void main(){
maybe_call_next_method();
vertexcolor = in_vertexcolor;
}")
(define-class-shader (vertex-colored-entity :fragment-shader)
"in vec4 vertexcolor;
out vec4 color;
void main(){
maybe_call_next_method();
color *= vertexcolor;
}")
(define-shader-entity textured-entity (renderable)
((texture :initform NIL :initarg :texture :accessor texture)))
(defmethod stage :after ((entity textured-entity) (area staging-area))
(stage (texture entity) area))
(defmethod bind-textures :after ((obj textured-entity))
(bind (texture obj) :texture0))
(define-class-shader (textured-entity :vertex-shader)
"layout (location = 2) in vec2 in_uv;
out vec2 uv;
void main(){
maybe_call_next_method();
uv = in_uv;
}")
(define-class-shader (textured-entity :fragment-shader)
"in vec2 uv;
out vec4 color;
uniform sampler2D texture_image;
void main(){
maybe_call_next_method();
color *= texture(texture_image, uv);
}")
(define-transfer textured-entity texture)
(defmethod enter (thing (container 3ds:container))
(3ds:enter thing container))
(defmethod leave (thing (container 3ds:container))
(3ds:leave thing container))
(defmethod clear ((container 3ds:container))
(3ds:clear container))
(defmethod location ((region 3ds:region))
(3ds:location region))
(defmethod bsize ((region 3ds:region))
(3ds:bsize region))
(defclass mesh-entity (entity)
((mesh-asset :initform NIL :initarg :asset :accessor mesh-asset)
(mesh :initarg :mesh :initform NIL :accessor mesh)))
(defmethod stage :after ((entity mesh-entity) (area staging-area))
(register-load-observer area entity (mesh-asset entity))
(stage (mesh-asset entity) area))
(defmethod observe-load-state ((entity mesh-entity) (asset asset) (state (eql :loaded)) (area staging-area))
(setf (mesh-asset entity) asset)
(restage entity area))
(define-transfer mesh-entity mesh mesh-asset)
(defmethod (setf mesh-asset) :after ((asset asset) (entity mesh-entity))
(setf (mesh entity) (or (mesh entity) T)))
(defmethod (setf mesh) ((mesh mesh-data) (entity mesh-entity))
(setf (vertex-array entity) (resource (mesh-asset entity) (name mesh))))
(defmethod (setf mesh) (name (entity mesh-entity))
(let ((mesh (gethash name (meshes (mesh-asset entity)))))
(if mesh
(setf (mesh entity) mesh)
#-trial-release
(error "No mesh named ~s found. The following are known:~{~% ~s~}"
name (alexandria:hash-table-keys (meshes (mesh-asset entity)))))))
(defmethod (setf mesh) ((anything (eql T)) (entity mesh-entity))
(loop for mesh being the hash-values of (meshes (mesh-asset entity))
do (return (setf (mesh entity) mesh))))
(defmethod material ((entity mesh-entity))
(when (typep (mesh entity) 'mesh-data)
(material (mesh entity))))
(defclass multi-mesh-entity (entity)
((mesh-asset :initform NIL :initarg :asset :accessor mesh-asset)
(mesh :initarg :mesh :initform NIL :accessor mesh)))
(defmethod stage :after ((entity multi-mesh-entity) (area staging-area))
(register-load-observer area entity (mesh-asset entity))
(stage (mesh-asset entity) area))
(defmethod observe-load-state ((entity multi-mesh-entity) (asset asset) (state (eql :loaded)) (area staging-area))
(setf (mesh-asset entity) asset)
(restage entity area))
(define-transfer multi-mesh-entity mesh mesh-asset)
(defmethod (setf mesh-asset) :after ((asset asset) (entity multi-mesh-entity))
(setf (mesh entity) (or (mesh entity) T)))
(defmethod (setf mesh) ((meshes cons) (entity multi-mesh-entity))
(let ((arrays (make-array (length meshes))))
(map-into arrays (lambda (mesh) (resource (mesh-asset entity) (name mesh))) meshes)
(setf (vertex-arrays entity) arrays)))
(defmethod (setf mesh) (name (entity multi-mesh-entity))
(if (mesh-asset entity)
(let ((mesh (gethash name (meshes (mesh-asset entity)))))
(setf (mesh entity) (if mesh
(list mesh)
(or (loop for i from 0
for mesh = (gethash (cons name i) (meshes (mesh-asset entity)))
while mesh collect mesh)
#-trial-release
(error "No mesh named ~s found. The following are known:~{~% ~s~}"
name (alexandria:hash-table-keys (meshes (mesh-asset entity))))))))
(setf (slot-value entity 'mesh) name)))
(defmethod (setf mesh) ((all (eql T)) (entity multi-mesh-entity))
(setf (mesh entity) (alexandria:hash-table-values (meshes (mesh-asset entity)))))
(defclass lod-entity (entity)
((lods :initform #() :reader lods)))
(defmethod shared-initialize :after ((entity lod-entity) slots &key (lods NIL lods-p))
(when lods-p (setf (lods entity) lods)))
(defgeneric select-lod (lod entity))
(defmethod select-lod ((default (eql T)) (entity lod-entity))
(select-lod (camera (scene +main+)) entity))
(define-transfer lod-entity lods)
(defclass lod ()
((mesh :initform () :initarg :mesh :accessor mesh)
(threshold :initform 0.0 :initarg :threshold :accessor threshold)))
(defmethod (setf lods) ((lods vector) (entity lod-entity))
(setf (slot-value entity 'lods) (sort lods #'< :key #'threshold)))
(defmethod (setf lods) ((lods sequence) (entity lod-entity))
(setf (lods entity) (map 'vector #'identity lods)))
(defmethod select-lod ((lod lod) (entity lod-entity))
(setf (mesh entity) (mesh lod)))
(defmethod select-lod ((level integer) (entity lod-entity))
(let ((lods (lods entity)))
(when (< 0 (length lods))
(select-lod (aref lods (clamp 0 level (1- (length lods)))) entity))))
(defmethod select-lod ((value single-float) (entity lod-entity))
(let ((lods (lods entity)))
(when (< 0 (length lods))
(loop with optimal-lod = (aref lods 0)
for i from 1 below (length lods)
for lod = (aref lods i)
do (unless (< value (threshold lod))
(select-lod optimal-lod entity)
(return optimal-lod))
(setf optimal-lod lod)))))
(defclass coverage-lod-entity (lod-entity)
())
;; KLUDGE: early def to avoid dependency cycle
(defclass camera () ())
(defmethod select-lod ((camera camera) (entity coverage-lod-entity))
(select-lod (float (/ (screen-area entity camera) (screen-area NIL camera)) 0f0) entity))
(defclass distance-lod-entity (lod-entity)
())
(defmethod select-lod ((camera camera) (entity distance-lod-entity))
(select-lod (vdistance (location entity) (location camera)) entity))
(defclass basic-node (transformed-entity array-container)
())
(defmethod global-bbox ((node basic-node))
(if (= 0 (length node))
(cons (global-location node) (global-location node))
(let ((min (vec3 most-positive-single-float))
(max (vec3 most-negative-single-float)))
(sequences:dosequence (child node (cons min max))
(destructuring-bind (child-min . child-max) (global-bbox child)
(nvmin min child-min)
(nvmax max child-max))))))