126 lines
4.0 KiB
Odin
126 lines
4.0 KiB
Odin
package sectr
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import rl "vendor:raylib"
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// The points to pixels and pixels to points are our only reference to accurately converting
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// an object from world space to screen-space.
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// This prototype engine will have all its spacial unit base for distances in centimetres.
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Inches_To_Centimetre :: cast(f32) 2.54
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Points_Per_Centimetre := cast(f32) 28.3465
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Centimetres_Per_Point :: cast(f32) 1.0 / 28.3465 // Precalculated reciprocal for multiplication
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DPT_DPC :: cast(f32) 72.0 * Inches_To_Centimetre
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when ODIN_OS == OS_Type.Windows {
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os_default_dpc :: 96 * Inches_To_Centimetre
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// 1 inch = 2.54 cm, 96 inch * 2.54 = 243.84 DPC
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}
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cm_to_pixels :: proc( cm : f32 ) -> f32 {
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screen_dpc := get_state().app_window.dpc
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return cm * screen_dpc
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}
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vec2_cm_to_pixels :: proc( v : Vec2 ) -> Vec2 {
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screen_dpc := get_state().app_window.dpc
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return v * screen_dpc
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}
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points_to_pixels :: proc( points : f32 ) -> f32 {
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screen_dpc := get_state().app_window.dpc
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cm_per_pixel := 1.0 / screen_dpc
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return points * DPT_DPC * cm_per_pixel
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}
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pixels_to_points :: proc( pixels : f32 ) -> f32 {
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screen_dpc := get_state().app_window.dpc
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cm_per_pixel := 1.0 / screen_dpc
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return pixels * cm_per_pixel * Points_Per_Centimetre
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}
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vec2_points_to_pixels :: proc ( vpoints : Vec2 ) -> Vec2 {
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screen_dpc := get_state().app_window.dpc
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cm_per_pixel := 1.0 / screen_dpc
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return vpoints * DPT_DPC * cm_per_pixel
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}
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Camera :: rl.Camera2D
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AreaSize :: distinct Vec2
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Bounds2 :: struct {
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top_left, bottom_right : Vec2
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}
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BoundsCorners2 :: struct {
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top_left, top_right, bottom_left, bottom_right : Vec2
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}
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Extents2 :: distinct Vec2
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Extents2i :: distinct Vec2i
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bounds2_radius :: proc( bounds : Bounds2 ) -> f32 {
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return max( bounds.bottom_right.x, bounds.top_left.y )
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}
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extent_from_size :: proc ( size : AreaSize ) -> Extents2 {
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return transmute(Extents2) size * 2.0
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}
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screen_size :: proc "contextless" () -> AreaSize {
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extent := get_state().app_window.extent
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return transmute(AreaSize) (extent * 2.0)
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}
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screen_get_corners :: proc() -> BoundsCorners2 {
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state := get_state(); using state
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screen_extent := state.app_window.extent
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top_left := Vec2 { -screen_extent.x, screen_extent.y }
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top_right := Vec2 { screen_extent.x, screen_extent.y }
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bottom_left := Vec2 { -screen_extent.x, -screen_extent.y }
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bottom_right := Vec2 { screen_extent.x, -screen_extent.y }
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return { top_left, top_right, bottom_left, bottom_right }
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}
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view_get_bounds :: proc() -> Bounds2 {
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state := get_state(); using state
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cam := & project.workspace.cam
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screen_extent := state.app_window.extent
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top_left := cam.target + Vec2 { -screen_extent.x, screen_extent.y }
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bottom_right := cam.target + Vec2 { screen_extent.x, -screen_extent.y }
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return { top_left, bottom_right }
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}
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view_get_corners :: proc() -> BoundsCorners2 {
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state := get_state(); using state
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cam := & project.workspace.cam
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cam_zoom_ratio := 1.0 / cam.zoom
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screen_extent := state.app_window.extent * cam_zoom_ratio
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top_left := cam.target + Vec2 { -screen_extent.x, screen_extent.y }
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top_right := cam.target + Vec2 { screen_extent.x, screen_extent.y }
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bottom_left := cam.target + Vec2 { -screen_extent.x, -screen_extent.y }
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bottom_right := cam.target + Vec2 { screen_extent.x, -screen_extent.y }
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return { top_left, top_right, bottom_left, bottom_right }
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}
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screen_to_render :: proc( pos : Vec2 ) -> Vec2 {
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screen_extent := transmute(Vec2) get_state().project.workspace.cam.offset
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return pos + { screen_extent.x, -screen_extent.y }
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}
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world_screen_extent :: proc () -> Extents2 {
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state := get_state(); using state
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cam_zoom_ratio := 1.0 / project.workspace.cam.zoom
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return app_window.extent * cam_zoom_ratio
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}
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world_to_screen_pos :: proc( position : Vec2 ) -> Vec2 {
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return { position.x, position.y * -1 }
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}
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world_to_screen_no_zoom :: proc( position : Vec2 ) -> Vec2 {
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state := get_state(); using state
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cam_zoom_ratio := 1.0 / state.project.workspace.cam.zoom
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return { position.x, position.y * -1 } * cam_zoom_ratio
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}
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