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Diya-API/Diya/DiyaRectangle.class.st
2022-03-06 00:58:28 +01:00

39 lines
1.3 KiB
Smalltalk

Class {
#name : #DiyaRectangle,
#superclass : #Diya2DNode,
#category : #'Diya-Graphics'
}
{ #category : #accessing }
DiyaRectangle >> draw [
{
0.0. 0.0. 1.0.
0.0. extent y. 1.0.
extent x. extent y. 1.0.
extent x. 0.0. 1.0.
} doWithIndex: [:e :i| context buffer at: i put: e].
shader use.
shader setUniform: #u_time value: DiyaClock uniqueInstance elapsedTime asFloat.
shader setUniform: #u_transform value: {GL_TRUE. self tf asGLBuffer}.
shader setUniform: #u_projection value: {GL_FALSE. context projection buffer}.
shader setUniform: #u_resolution value: { context resolution x. context resolution y }.
context mouse ifNotNil: [
"in shader, window origin is bottom left conor of the window
the mouse position should be transformed to this coodinate"
shader setUniform: #u_mouse value: { context mouse x. context resolution y - context mouse y }.
].
context vao enableAttribute: 0.
OpenGLVertexArray vertexAttributePointerIndex: 0 size:3 type: GL_FLOAT normalized: GL_FALSE stride: 0 pointer: nil.
context vbo subData: GL_ARRAY_BUFFER offset:0 data: context buffer.
OpenGL drawArrays: GL_QUADS first:0 count: 4.
context vao disableAttribute: 0.
]
{ #category : #accessing }
DiyaRectangle >> initialize [
super initialize.
self extent:10@10.
translation := nil.
children := nil
]