commit go and lua draw/create model tutorials + comments

draw_and_create_model_no_pipeline.go

@@ -0,0 +1,216 @@
+// Create and draw models without a pipeline and using ModelBuilder
+
+package main
+
+import (
+	hg "github.com/harfang3d/harfang-go/v3"
+)
+
+func main() {
+    hg.InputInit()
+    hg.WindowSystemInit()
+
+    res_x, res_y := int32(1280), int32(720)
+    win := hg.RenderInitWithWindowTitleWidthHeightResetFlags("Harfang - Draw and Create Models using ModelBuilder - no Pipeline",
+                        res_x, res_y, hg.RFVSync | hg.RFMSAA4X)
+
+    // vertex layout, materials and models
+    vtx_layout := hg.VertexLayoutPosFloatNormUInt8()
+
+    mdl_builder := hg.NewModelBuilder()
+
+    // Below are the 6 faces of the cube model, with 4 vertices declared for each face, that are added as 2 triangles to make a complete cubic face
+
+    // -
+    vertex0 := hg.NewVertex() // Vertex constructor
+    vertex0.SetPos(hg.NewVec3WithXYZ(-0.5, -0.5, -0.5)) // Declaring the vertex position
+    vertex0.SetNormal(hg.NewVec3WithXYZ(0, 0, -1)) // Declaring the normal
+    vertex0.SetUv0(hg.NewVec2WithXY(0, 0)) // Declaring the UV
+    a := mdl_builder.AddVertex(vertex0) // Adding the vertex to the ModelBuilder
+
+    vertex1 := hg.NewVertex()
+    vertex1.SetPos(hg.NewVec3WithXYZ(-0.5, 0.5, -0.5))
+    vertex1.SetNormal(hg.NewVec3WithXYZ(0, 0, -1))
+    vertex1.SetUv0(hg.NewVec2WithXY(0, 1))
+    b := mdl_builder.AddVertex(vertex1)
+
+    vertex2 := hg.NewVertex()
+    vertex2.SetPos(hg.NewVec3WithXYZ(0.5, 0.5, -0.5))
+    vertex2.SetNormal(hg.NewVec3WithXYZ(0, 0, -1))
+    vertex2.SetUv0(hg.NewVec2WithXY(1, 1))
+    c := mdl_builder.AddVertex(vertex2)
+
+    vertex3 := hg.NewVertex()
+    vertex3.SetPos(hg.NewVec3WithXYZ(0.5, -0.5, -0.5))
+    vertex3.SetNormal(hg.NewVec3WithXYZ(0, 0, -1))
+    vertex3.SetUv0(hg.NewVec2WithXY(1, 0))
+    d := mdl_builder.AddVertex(vertex3)
+
+    mdl_builder.AddTriangle(d, c, b) // Adding the first triangle of the current face
+    mdl_builder.AddTriangle(b, a, d) // Second one
+
+    // +
+    vertex0 = hg.NewVertex()
+    vertex0.SetPos(hg.NewVec3WithXYZ(-0.5, -0.5, 0.5))
+    vertex0.SetNormal(hg.NewVec3WithXYZ(0, 0, 1))
+    vertex0.SetUv0(hg.NewVec2WithXY(0, 0))
+    a = mdl_builder.AddVertex(vertex0)
+
+    vertex1 = hg.NewVertex()
+    vertex1.SetPos(hg.NewVec3WithXYZ(-0.5,0.5, 0.5))
+    vertex1.SetNormal(hg.NewVec3WithXYZ(0, 0, 1))
+    vertex1.SetUv0(hg.NewVec2WithXY(0, 1))
+    b = mdl_builder.AddVertex(vertex1)
+
+    vertex2 = hg.NewVertex()
+    vertex2.SetPos(hg.NewVec3WithXYZ(0.5, 0.5, 0.5))
+    vertex2.SetNormal(hg.NewVec3WithXYZ(0, 0, 1))
+    vertex2.SetUv0(hg.NewVec2WithXY(1, 1))
+    c = mdl_builder.AddVertex(vertex2)
+
+    vertex3 = hg.NewVertex()
+    vertex3.SetPos(hg.NewVec3WithXYZ(0.5, -0.5, 0.5))
+    vertex3.SetNormal(hg.NewVec3WithXYZ(0, 0, 1))
+    vertex3.SetUv0(hg.NewVec2WithXY(1, 0))
+    d = mdl_builder.AddVertex(vertex3)
+
+    mdl_builder.AddTriangle(a, b, c)
+    mdl_builder.AddTriangle(a, c, d)
+
+    // -
+    vertex0 = hg.NewVertex()
+    vertex0.SetPos(hg.NewVec3WithXYZ(-0.5, -0.5, -0.5))
+    vertex0.SetNormal(hg.NewVec3WithXYZ(0, -1, 0))
+    vertex0.SetUv0(hg.NewVec2WithXY(0, 0))
+    a = mdl_builder.AddVertex(vertex0)
+
+    vertex1 = hg.NewVertex()
+    vertex1.SetPos(hg.NewVec3WithXYZ(-0.5, -0.5, 0.5))
+    vertex1.SetNormal(hg.NewVec3WithXYZ(0, -1, 0))
+    vertex1.SetUv0(hg.NewVec2WithXY(0, 1))
+    b = mdl_builder.AddVertex(vertex1)
+
+    vertex2 = hg.NewVertex()
+    vertex2.SetPos(hg.NewVec3WithXYZ(0.5, -0.5, 0.5))
+    vertex2.SetNormal(hg.NewVec3WithXYZ(0, -1, 0))
+    vertex2.SetUv0(hg.NewVec2WithXY(1, 1))
+    c = mdl_builder.AddVertex(vertex2)
+
+    vertex3 = hg.NewVertex()
+    vertex3.SetPos(hg.NewVec3WithXYZ(0.5, -0.5, -0.5))
+    vertex3.SetNormal(hg.NewVec3WithXYZ(0, -1, 0))
+    vertex3.SetUv0(hg.NewVec2WithXY(1, 0))
+    d = mdl_builder.AddVertex(vertex3)
+
+    mdl_builder.AddTriangle(a, b, c)
+    mdl_builder.AddTriangle(a, c, d)
+
+    // +
+    vertex0 = hg.NewVertex()
+    vertex0.SetPos(hg.NewVec3WithXYZ(-0.5, 0.5, -0.5))
+    vertex0.SetNormal(hg.NewVec3WithXYZ(0, 1, 0))
+    vertex0.SetUv0(hg.NewVec2WithXY(0, 0))
+    a = mdl_builder.AddVertex(vertex0)
+
+    vertex1 = hg.NewVertex()
+    vertex1.SetPos(hg.NewVec3WithXYZ(-0.5, 0.5, 0.5))
+    vertex1.SetNormal(hg.NewVec3WithXYZ(0, 1, 0))
+    vertex1.SetUv0(hg.NewVec2WithXY(0, 1))
+    b = mdl_builder.AddVertex(vertex1)
+
+    vertex2 = hg.NewVertex()
+    vertex2.SetPos(hg.NewVec3WithXYZ(0.5, 0.5, 0.5))
+    vertex2.SetNormal(hg.NewVec3WithXYZ(0, 1, 0))
+    vertex2.SetUv0(hg.NewVec2WithXY(1, 1))
+    c = mdl_builder.AddVertex(vertex2)
+
+    vertex3 = hg.NewVertex()
+    vertex3.SetPos(hg.NewVec3WithXYZ(0.5, 0.5, -0.5))
+    vertex3.SetNormal(hg.NewVec3WithXYZ(0, 1, 0))
+    vertex3.SetUv0(hg.NewVec2WithXY(1, 0))
+    d = mdl_builder.AddVertex(vertex3)
+
+    mdl_builder.AddTriangle(d, c, b)
+    mdl_builder.AddTriangle(b, a, d)
+
+    // -
+    vertex0 = hg.NewVertex()
+    vertex0.SetPos(hg.NewVec3WithXYZ(-0.5, -0.5, -0.5))
+    vertex0.SetNormal(hg.NewVec3WithXYZ(-1, 0, 0))
+    vertex0.SetUv0(hg.NewVec2WithXY(0, 0))
+    a = mdl_builder.AddVertex(vertex0)
+
+    vertex1 = hg.NewVertex()
+    vertex1.SetPos(hg.NewVec3WithXYZ(-0.5, -0.5, 0.5))
+    vertex1.SetNormal(hg.NewVec3WithXYZ(-1, 0, 0))
+    vertex1.SetUv0(hg.NewVec2WithXY(0, 1))
+    b = mdl_builder.AddVertex(vertex1)
+
+    vertex2 = hg.NewVertex()
+    vertex2.SetPos(hg.NewVec3WithXYZ(-0.5, 0.5, 0.5))
+    vertex2.SetNormal(hg.NewVec3WithXYZ(-1, 0, 0))
+    vertex2.SetUv0(hg.NewVec2WithXY(1, 1))
+    c = mdl_builder.AddVertex(vertex2)
+
+    vertex3 = hg.NewVertex()
+    vertex3.SetPos(hg.NewVec3WithXYZ(-0.5, 0.5, -0.5))
+    vertex3.SetNormal(hg.NewVec3WithXYZ(-1, 0, 0))
+    vertex3.SetUv0(hg.NewVec2WithXY(1, 0))
+    d = mdl_builder.AddVertex(vertex3)
+
+    mdl_builder.AddTriangle(d, c, b)
+    mdl_builder.AddTriangle(b, a, d)
+
+    // +
+    vertex0 = hg.NewVertex()
+    vertex0.SetPos(hg.NewVec3WithXYZ(0.5, -0.5, -0.5))
+    vertex0.SetNormal(hg.NewVec3WithXYZ(1, 0, 0))
+    vertex0.SetUv0(hg.NewVec2WithXY(0, 0))
+    a = mdl_builder.AddVertex(vertex0)
+
+    vertex1 = hg.NewVertex()
+    vertex1.SetPos(hg.NewVec3WithXYZ(0.5, -0.5, 0.5))
+    vertex1.SetNormal(hg.NewVec3WithXYZ(1, 0, 0))
+    vertex1.SetUv0(hg.NewVec2WithXY(0, 1))
+    b = mdl_builder.AddVertex(vertex1)
+
+    vertex2 = hg.NewVertex()
+    vertex2.SetPos(hg.NewVec3WithXYZ(0.5, 0.5, 0.5))
+    vertex2.SetNormal(hg.NewVec3WithXYZ(1, 0, 0))
+    vertex2.SetUv0(hg.NewVec2WithXY(1, 1))
+    c = mdl_builder.AddVertex(vertex2)
+
+    vertex3 = hg.NewVertex()
+    vertex3.SetPos(hg.NewVec3WithXYZ(0.5, 0.5, -0.5))
+    vertex3.SetNormal(hg.NewVec3WithXYZ(1, 0, 0))
+    vertex3.SetUv0(hg.NewVec2WithXY(1, 0))
+    d = mdl_builder.AddVertex(vertex3)
+
+    mdl_builder.AddTriangle(a, b, c)
+    mdl_builder.AddTriangle(a, c, d)
+
+    cube_mdl := mdl_builder.MakeModel(vtx_layout) // Create the actuel cube model
+
+    ground_mdl := hg.CreatePlaneModel(vtx_layout, 5, 5, 1, 1)
+
+    shader := hg.LoadProgramFromFile("resources_compiled/shaders/mdl")
+
+    // main loop
+    angle := float32(0.0)
+
+    for !hg.ReadKeyboardWithName("raw").Key(hg.KEscape) {
+        dt := hg.TickClock()
+		angle = angle + hg.TimeToSecF(dt)
+
+        viewpoint := hg.TranslationMat4(hg.NewVec3WithXYZ(0, 1, -3))
+        hg.SetViewPerspective(0, 0, 0, res_x, res_y, viewpoint)
+
+		hg.DrawModelWithSliceOfValuesSliceOfTextures(0, cube_mdl, shader, hg.GoSliceOfUniformSetValue{}, hg.GoSliceOfUniformSetTexture{}, hg.TransformationMat4(hg.NewVec3WithXYZ(0.0, 1, 0.0), hg.NewVec3WithXYZ(angle, angle, angle)))
+		hg.DrawModelWithSliceOfValuesSliceOfTextures(0, ground_mdl, shader, hg.GoSliceOfUniformSetValue{}, hg.GoSliceOfUniformSetTexture{}, hg.TranslationMat4(hg.NewVec3WithXYZ(0.0, 0.0, 0.0)))
+
+
+        hg.Frame()
+        hg.UpdateWindow(win)
+    }
+    hg.RenderShutdown()
+}