func Draw(renData *RenderData) {
numverts := renData.Numverts
if renData.InstanceData == 0 {
if renData.Indices == 0 {
gl.DrawArrays(renData.Mode, 0, renData.Numverts)
} else {
gl.DrawElements(renData.Mode, numverts, renData.IndexType, uintptr(0))
}
} else {
if renData.Indices == 0 {
gl.DrawArraysInstanced(renData.Mode, 0, renData.Numverts, renData.NumInstances)
} else {
gl.DrawElementsInstanced(renData.Mode, renData.Numverts, renData.IndexType, 0, renData.NumInstances)
}
}
}
func (ps *ParticleSystem) Render(Proj mgl.Mat4, View mgl.Mat4, clippingPlane mgl.Vec4) {
gl.PointSize(64)
ps.VaoRender1.Bind()
ps.RenderProg.Use()
Loc := ps.RenderLoc
Loc.Proj.UniformMatrix4f(false, (*[16]float32)(&Proj))
Loc.View.UniformMatrix4f(false, (*[16]float32)(&View))
Loc.MaxLifetime.Uniform1f(ps.MaxLifetime)
Loc.Image.Uniform1i(constants.TextureFireBall)
Loc.ClippingPlane_ws.Uniform4f(clippingPlane[0], clippingPlane[1], clippingPlane[2], clippingPlane[3])
gl.DepthMask(false)
gl.DrawArraysInstanced(gl.TRIANGLE_FAN, 0, 4, ps.NumParticles)
gl.DepthMask(true)
}