func (c *cloudState) tick(delta float64) {
if !DrawClouds {
return
}
c.offset += delta
tex := GetTexture("steven:environment/clouds")
r := tex.Rect()
c.program.Use()
c.shader.PerspectiveMatrix.Matrix4(&perspectiveMatrix)
c.shader.CameraMatrix.Matrix4(&cameraMatrix)
c.shader.SkyOffset.Float(SkyOffset)
c.shader.LightLevel.Float(LightLevel)
c.shader.Offset.Float3(float32(int(Camera.X)), 0, float32(int(Camera.Z)))
c.shader.TextureInfo.Float4(
float32(r.X),
float32(r.Y),
float32(r.Width),
float32(r.Height),
)
c.shader.Atlas.Float(float32(tex.Atlas()))
c.shader.CloudOffset.Float(float32(c.offset / 60.0))
c.shader.Textures.Int(0)
gl.ActiveTexture(1)
c.texture.Bind(gl.Texture2D)
if c.dirty {
c.texture.SubImage2D(0, 0, 0, 512, 512, gl.Red, gl.UnsignedByte, c.data)
c.dirty = false
}
c.shader.CloudMap.Int(1)
c.array.Bind()
gl.DrawArrays(gl.Points, 0, c.numPoints)
}
func transDraw() {
gl.ActiveTexture(0)
accum.Bind(gl.Texture2D)
gl.ActiveTexture(1)
revealage.Bind(gl.Texture2D)
gl.ActiveTexture(2)
fbColor.Bind(gl.Texture2DMultisample)
transState.program.Use()
transState.shader.Accum.Int(0)
transState.shader.Revealage.Int(1)
transState.shader.Color.Int(2)
transState.shader.Samples.Int(rSamples.Value())
transState.array.Bind()
gl.DrawArrays(gl.Triangles, 0, 6)
}
func drawLines() {
if lineState.count > 0 {
gl.Enable(gl.Blend)
lineState.program.Use()
lineState.shader.PerspectiveMatrix.Matrix4(&perspectiveMatrix)
lineState.shader.CameraMatrix.Matrix4(&cameraMatrix)
lineState.array.Bind()
lineState.buffer.Bind(gl.ArrayBuffer)
if len(lineState.data) > lineState.prevSize {
lineState.prevSize = len(lineState.data)
lineState.buffer.Data(lineState.data, gl.DynamicDraw)
} else {
target := lineState.buffer.Map(gl.WriteOnly, len(lineState.data))
copy(target, lineState.data)
lineState.buffer.Unmap()
}
gl.DrawArrays(gl.Triangles, 0, lineState.count)
lineState.count = 0
lineState.data = lineState.data[:0]
gl.Disable(gl.Blend)
}
}