64 lines
1.2 KiB
Go
64 lines
1.2 KiB
Go
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package vertex
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import (
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"zworld/engine/renderapi/color"
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"zworld/plugins/math/vec2"
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"zworld/plugins/math/vec3"
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"zworld/plugins/math/vec4"
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)
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// P - Position only vertex
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type P struct {
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vec3.T `vtx:"position,float,3"`
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}
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func (v P) Position() vec3.T { return v.T }
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// C - Colored Vertex
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type C struct {
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P vec3.T `vtx:"position,float,3"`
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N vec3.T `vtx:"normal,float,3"`
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C vec4.T `vtx:"color_0,float,4"`
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}
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func (v C) Position() vec3.T { return v.P }
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// T - Textured Vertex
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type T struct {
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P vec3.T `vtx:"position,float,3"`
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N vec3.T `vtx:"normal,float,3"`
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T vec2.T `vtx:"texcoord_0,float,2"`
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}
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func (v T) Position() vec3.T { return v.P }
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type UI struct {
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P vec3.T `vtx:"position,float,3"`
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C color.T `vtx:"color_0,float,4"`
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T vec2.T `vtx:"texcoord_0,float,2"`
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}
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func (v UI) Position() vec3.T { return v.P }
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func Min[V Vertex](vertices []V) vec3.T {
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if len(vertices) == 0 {
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return vec3.Zero
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}
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min := vec3.InfPos
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for _, v := range vertices {
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min = vec3.Min(min, v.Position())
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}
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return min
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}
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func Max[V Vertex](vertices []V) vec3.T {
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if len(vertices) == 0 {
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return vec3.Zero
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}
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max := vec3.InfNeg
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for _, v := range vertices {
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max = vec3.Max(max, v.Position())
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}
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return max
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}
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