: map-columns ( ... a quot: ( ... col -- ... newcol ) -- ... c )
'[ columns _ 4 napply ] make-matrix4 ; inline
-
+
PRIVATE>
TYPED: m4+ ( a: matrix4 b: matrix4 -- c: matrix4 ) [ v+ ] 2map-columns ;
b3 first a1 n*v :> c3a
b4 first a1 n*v :> c4a
- b1 second a2 n*v c1a v+ :> c1b
+ b1 second a2 n*v c1a v+ :> c1b
b2 second a2 n*v c2a v+ :> c2b
b3 second a2 n*v c3a v+ :> c3b
b4 second a2 n*v c4a v+ :> c4b
- b1 third a3 n*v c1b v+ :> c1c
+ b1 third a3 n*v c1b v+ :> c1c
b2 third a3 n*v c2b v+ :> c2c
b3 third a3 n*v c3b v+ :> c3c
b4 third a3 n*v c4b v+ :> c4c
TYPED:: m4.v ( m: matrix4 v: float-4 -- v': float-4 )
m columns :> ( m1 m2 m3 m4 )
-
+
v first m1 n*v
v second m2 n*v v+
v third m3 n*v v+
TYPED: translation-matrix4 ( offset: float-4 -- matrix: matrix4 )
[
linear>homogeneous
- [
+ [
float-4{ 1.0 0.0 0.0 0.0 }
float-4{ 0.0 1.0 0.0 0.0 }
float-4{ 0.0 0.0 1.0 0.0 }
triangle-a triangle-b v- :> triangle-hi
diagonal triangle-hi triangle-lo (rotation-matrix4) ;
-
+
TYPED:: frustum-matrix4 ( xy: float-4 near: float far: float -- matrix: matrix4 )
[
near near near far + 2 near far * * float-4-boa ! num
float-4{ t t f f } xy near far - float-4-with v? ! denom
v/ :> fov
-
+
float-4{ 0.0 -1.0 0.0 0.0 } :> negone
fov vmerge-diagonal