add models examples

examples/models/orthographic/main.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	rl "github.com/gen2brain/raylib-go/raylib"
+)
+
+func main() {
+
+	fovyPerspective := float32(45)
+	widthOrthographic := float32(10)
+
+	screenWidth := int32(1280)
+	screenHeight := int32(800)
+
+	rl.InitWindow(screenWidth, screenHeight, "raylib [models] example - orthographic")
+
+	camera := rl.Camera{}
+	camera.Position = rl.NewVector3(0.0, 10.0, 10.0)
+	camera.Target = rl.NewVector3(0.0, 0.0, 0.0)
+	camera.Up = rl.NewVector3(0.0, 1.0, 0.0)
+	camera.Fovy = fovyPerspective
+	camera.Projection = rl.CameraPerspective
+
+	rl.SetTargetFPS(60)
+
+	for !rl.WindowShouldClose() {
+
+		rl.UpdateCamera(&camera, rl.CameraOrbital)
+
+		if rl.IsKeyPressed(rl.KeySpace) {
+
+			if camera.Projection == rl.CameraPerspective {
+				camera.Fovy = widthOrthographic
+				camera.Projection = rl.CameraOrthographic
+			} else {
+				camera.Fovy = fovyPerspective
+				camera.Projection = rl.CameraPerspective
+			}
+
+		}
+
+		rl.BeginDrawing()
+
+		rl.ClearBackground(rl.RayWhite)
+
+		rl.BeginMode3D(camera)
+
+		rl.DrawCube(rl.NewVector3(-4, 0, 2), 2, 5, 2, rl.Red)
+		rl.DrawCubeWires(rl.NewVector3(-4, 0, 2), 2, 5, 2, rl.Gold)
+		rl.DrawCubeWires(rl.NewVector3(-4, 0, -2), 3, 6, 2, rl.Maroon)
+
+		rl.DrawSphere(rl.NewVector3(-1, 0, -2), 1, rl.Green)
+		rl.DrawSphereWires(rl.NewVector3(1, 0, 2), 2, 16, 16, rl.Lime)
+
+		rl.DrawCylinder(rl.NewVector3(4, 0, -2), 1, 2, 3, 4, rl.SkyBlue)
+		rl.DrawCylinderWires(rl.NewVector3(4, 0, -2), 1, 2, 3, 4, rl.DarkBlue)
+		rl.DrawCylinderWires(rl.NewVector3(4.5, -1, 2), 1, 1, 2, 6, rl.Brown)
+
+		rl.DrawCylinder(rl.NewVector3(1, 0, -4), 0, 1.5, 3, 8, rl.Gold)
+		rl.DrawCylinderWires(rl.NewVector3(1, 0, -4), 0, 1.5, 3, 8, rl.Pink)
+
+		rl.DrawGrid(10, 1)
+
+		rl.EndMode3D()
+
+		rl.DrawText("PRESS SPACE TO CHANGE CAMERA PROJECTION", 10, 10, 20, rl.Black)
+
+		if camera.Projection == rl.CameraPerspective {
+			rl.DrawText("CURRENT CAMERA PROJECTION IS PERSPECTIVE", 10, 30, 20, rl.Black)
+		} else {
+			rl.DrawText("CURRENT CAMERA PROJECTION IS ORTHOGRAPHIC", 10, 30, 20, rl.Black)
+		}
+
+		rl.DrawFPS(screenWidth-100, 10)
+
+		rl.EndDrawing()
+	}
+
+	rl.CloseWindow()
+}