mirror of
https://github.com/lxsang/Diya-API.git
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97 lines
2.1 KiB
Smalltalk
97 lines
2.1 KiB
Smalltalk
Class {
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#name : #OrthoProjectionMatrix,
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#superclass : #ProjectionMatrix,
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#instVars : [
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'viewport',
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'near',
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'far'
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],
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#category : #'Diya-Math'
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}
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{ #category : #'as yet unclassified' }
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OrthoProjectionMatrix class >> fromDisplay: display [
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^ self viewport: (Rectangle origin: 0@0 corner: (display w) @ (display h) ) near: -1.0 far: 1.0.
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]
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{ #category : #'as yet unclassified' }
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OrthoProjectionMatrix class >> viewport:v near:n far:f [
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^ self new setViewport: v near:n far:f; yourself.
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> bottom [
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^ viewport origin y
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]
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{ #category : #initialization }
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OrthoProjectionMatrix >> calculate [
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self at:1 at:1 put: (2.0 /(self right - self left)).
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self at:2 at:2 put: (2.0 / (self top - self bottom)).
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self at:3 at:3 put: (2.0 / (self far - self near)) negated.
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self at:4 at:1 put: ((self right + self left)/ (self right - self left)) negated.
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self at:4 at:2 put: ((self top + self bottom) / (self top - self bottom)) negated.
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self at:4 at:3 put: ((self far + self near)/(self far - self near)) negated.
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]
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{ #category : #initialization }
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OrthoProjectionMatrix >> default [
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viewport := Rectangle origin: -1.0@ -1.0 corner: 1.0@1.0.
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near := -1.0.
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far := 1.0.
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> far [
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^ far
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> far: anObject [
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far := anObject
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> left [
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^ viewport origin x
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> near [
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^ near
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> near: anObject [
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near := anObject
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> right [
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^ viewport corner x
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]
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{ #category : #initialization }
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OrthoProjectionMatrix >> setViewport: v near: n far:f [
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viewport := v.
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near := n.
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far := f.
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self update.
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> top [
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^ viewport corner y
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> viewport [
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^ viewport
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]
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{ #category : #accessing }
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OrthoProjectionMatrix >> viewport: anObject [
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viewport := anObject
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]
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