X position of the left plane
X position of the right plane
Y position of the bottom plane
Y position of the top plane
distance from origin to near plane (in Z-)
distance from origin to far plane (in Z-)
an affine matrix that maps from eye coordinates to NDC.
import gfx.math.approx : approxUlp; const m = ortho_RH_M11(3f, 5f, -2f, 7f, 1f, 10f); const v1 = vec(3f, -2f, -1f, 1f); const v2 = vec(5f, 7f, -10f, 1f); const v0 = vec(4f, 2.5f, -5.5f, 1f); assert(approxUlp( m * v1, vec(-1f, 1f, -1f, 1f) )); assert(approxUlp( m * v2, vec(1f, -1f, 1f, 1f) )); assert(approxUlp( m * v0, vec(0f, 0f, 0f, 1f) ));
Build an orthographic projection matrix with right-hand NDC and [-1 .. 1] depth clipping