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Snippet to draw a 3D object in a v ui.CanvasLayout
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| // Interface `ui.GGApplication` | |
| fn (mut app AppState) on_draw() { | |
| window_size := app.gg.window_size() | |
| mut cc := app.win.get_or_panic[ui.CanvasLayout](ui.component_id('canvaslayout', 'layout')) | |
| sgl.viewport(cc.x, cc.y, cc.width, cc.height, true) | |
| mut ctx := app.gg | |
| // Draw a triangle | |
| ctx.draw_triangle_filled(450, 142, 530, 280, 370, 280, gx.red) | |
| // Draw 3D stuff | |
| sgl.defaults() | |
| sgl.load_pipeline(pip_3d) | |
| sgl.perspective(sgl.rad(45.0), 1.0, 0.1, 100.0) | |
| sgl.translate(0.0, 0.0, -12.0) | |
| rot := [f32(0.0), f32(30.0)] | |
| sgl.rotate(sgl.rad(rot[0]), 1.0, 0.0, 0.0) | |
| sgl.rotate(sgl.rad(rot[1]), 0.0, 1.0, 0.0) | |
| draw_cube() | |
| // Set back settings for the ui to draw correctly | |
| sgl.defaults() | |
| sgl.ortho(0.0, window_size.width, window_size.height, 0.0, 0.1, 100.0) | |
| sgl.viewport(0, 0, window_size.width, window_size.height, true) | |
| sgl.translate(0.0, 0.0, -1.0) // Super critical !!! Wihout this nothing shows | |
| } | |
| // Set the ui.window.win_init with this to set the 3D pipeline | |
| fn win_init(w &ui.Window) { | |
| println("ui.Window init") | |
| // 3d pipeline | |
| mut pipdesc := gfx.PipelineDesc{} | |
| unsafe { vmemset(&pipdesc, 0, int(sizeof(pipdesc))) } | |
| color_state := gfx.ColorTargetState{ | |
| blend: gfx.BlendState{ | |
| enabled: true | |
| src_factor_rgb: .src_alpha | |
| dst_factor_rgb: .one_minus_src_alpha | |
| } | |
| } | |
| pipdesc.colors[0] = color_state | |
| pipdesc.depth = gfx.DepthState{ | |
| write_enabled: true | |
| compare: .less_equal | |
| } | |
| pipdesc.cull_mode = .back | |
| //- app.pip_3d = sgl.make_pipeline(&pipdesc) | |
| pip_3d = sgl.make_pipeline(&pipdesc) // stored as global | |
| } | |
| fn draw_cube() { | |
| sgl.begin_quads() | |
| sgl.c3f(1.0, 0.0, 0.0) | |
| // edge coord | |
| // x,y,z, texture cord: u,v | |
| sgl.v3f_t2f(-1.0, 1.0, -1.0, -1.0, 1.0) | |
| sgl.v3f_t2f(1.0, 1.0, -1.0, 1.0, 1.0) | |
| sgl.v3f_t2f(1.0, -1.0, -1.0, 1.0, -1.0) | |
| sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0) | |
| sgl.c3f(0.0, 1.0, 0.0) | |
| sgl.v3f_t2f(-1.0, -1.0, 1.0, -1.0, 1.0) | |
| sgl.v3f_t2f(1.0, -1.0, 1.0, 1.0, 1.0) | |
| sgl.v3f_t2f(1.0, 1.0, 1.0, 1.0, -1.0) | |
| sgl.v3f_t2f(-1.0, 1.0, 1.0, -1.0, -1.0) | |
| sgl.c3f(0.0, 0.0, 1.0) | |
| sgl.v3f_t2f(-1.0, -1.0, 1.0, -1.0, 1.0) | |
| sgl.v3f_t2f(-1.0, 1.0, 1.0, 1.0, 1.0) | |
| sgl.v3f_t2f(-1.0, 1.0, -1.0, 1.0, -1.0) | |
| sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0) | |
| sgl.c3f(1.0, 0.5, 0.0) | |
| sgl.v3f_t2f(1.0, -1.0, 1.0, -1.0, 1.0) | |
| sgl.v3f_t2f(1.0, -1.0, -1.0, 1.0, 1.0) | |
| sgl.v3f_t2f(1.0, 1.0, -1.0, 1.0, -1.0) | |
| sgl.v3f_t2f(1.0, 1.0, 1.0, -1.0, -1.0) | |
| sgl.c3f(0.0, 0.5, 1.0) | |
| sgl.v3f_t2f(1.0, -1.0, -1.0, -1.0, 1.0) | |
| sgl.v3f_t2f(1.0, -1.0, 1.0, 1.0, 1.0) | |
| sgl.v3f_t2f(-1.0, -1.0, 1.0, 1.0, -1.0) | |
| sgl.v3f_t2f(-1.0, -1.0, -1.0, -1.0, -1.0) | |
| sgl.c3f(1.0, 0.0, 0.5) | |
| sgl.v3f_t2f(-1.0, 1.0, -1.0, -1.0, 1.0) | |
| sgl.v3f_t2f(-1.0, 1.0, 1.0, 1.0, 1.0) | |
| sgl.v3f_t2f(1.0, 1.0, 1.0, 1.0, -1.0) | |
| sgl.v3f_t2f(1.0, 1.0, -1.0, -1.0, -1.0) | |
| sgl.end() | |
| } |
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