modify code to draw cube

PracticeDx/VertexShader.hlsl

@@ -9,10 +9,10 @@ cbuffer CBuf
 	matrix transform;
 };
 
-VSOut main(float2 pos : Position, float3 color : Color)
+VSOut main(float3 pos : Position, float3 color : Color)
 {
 	VSOut vso;
-	vso.pos = mul(float4(pos.x, pos.y, 0.0f, 1.0f), transform);
+	vso.pos = mul(float4(pos, 1.0f), transform);
 	vso.color = color;
 
 	return vso;

PracticeDx/WinMain.cpp

@@ -40,42 +40,51 @@ struct Vertex
 {
     float x;
     float y;
+    float z;
 
     float r;
     float g;
     float b;
 };
-// create vertex buffer (1 2d triangle at center of screen)
+// create vertex buffer (8 vertices for one cube)
 const Vertex vertices[] =
 {
-    // center
-    { 0.0f, 0.5f, 1.0f, 0.0f, 0.0f },
-    { 0.5f, -0.5f, 0.0f, 1.0f, 0.0f },
-    { -0.5f, -0.5f, 0.0f, 0.0f, 1.0f },
-
-    // left top
-    { -0.3f, 0.3f, 0.0f, 1.0f, 0.0f },
-
-    // right top
-    { 0.3f, 0.3f, 0.0f, 0.0f, 1.0f },
-
-    // center bottom
-    { 0.0f, -0.8f, 1.0f, 0.0f, 0.0f },
+    // left bottom back
+    { -1.0f, -1.0f, -1.0f, 1.0f, 0.0f, 0.0f },
+    // right bottom back
+    { 1.0f, -1.0f, -1.0f, 0.0f, 1.0f, 0.0f },
+    // left top back
+    { -1.0f, 1.0f, -1.0f, 0.0f, 0.0f, 1.0f },
+    // right top back
+    { 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 0.0f },
+
+    // left bottom front
+    { -1.0f, -1.0f, 1.0f, 1.0f, 0.0f, 1.0f },
+    // right bottom front
+    { 1.0f, -1.0f, 1.0f, 0.0f, 1.0f, 1.0f },
+    // left top front
+    { -1.0f, 1.0f, 1.0f, 0.0f, 0.0f, 0.0f },
+    // right top front
+    { 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f },
 };
 
 // Define index buffer
 Microsoft::WRL::ComPtr<ID3D11Buffer>            pIndexBuffer;
-// create index buffer
+// Create index buffer
 const unsigned short indices[] =
 {
-    // draw center
-    0, 1, 2,
-    // draw left top
-    0, 2, 3,
-    // draw right top
-    0, 4, 1,
-    // draw bottom
-    1, 5, 2,
+    // back surface
+    0, 2, 1,	2, 3, 1,
+    // right surface
+    1, 3, 5,    3, 7, 5,
+    // top surface
+    2, 6, 3,	3, 6, 7,
+    // front surface
+    4, 5, 7,	4, 7, 6,
+    // left surface
+    0, 4, 2,	2, 4, 6,
+    // bottom surface
+    0, 1, 4,	1, 5, 4,
 };
 
 // Define constant buffer
@@ -94,7 +103,14 @@ ConstantBuffer cb =
     dx::XMMatrixTranspose(
         // rotate Z axis
         dx::XMMatrixRotationZ(-angle)
-        * dx::XMMatrixScaling(heightWidthRatio, 1.0f, 1.0f)
+        // rotate X axis
+        * dx::XMMatrixRotationX(-angle)
+        // scaling
+        //* dx::XMMatrixScaling(heightWidthRatio, 1.0f, 1.0f)
+        // translation
+        * dx::XMMatrixTranslation(0.0f, 0.0f, 4.0f)
+		// projection
+        * dx::XMMatrixPerspectiveLH( 1.0f, heightWidthRatio, 0.1f, 10.0f)
     )
 };
 
@@ -162,7 +178,14 @@ void DefineConstantBuffer(float angle)
         dx::XMMatrixTranspose(
             // rotate Z axis
             dx::XMMatrixRotationZ(-angle)
-            * dx::XMMatrixScaling(heightWidthRatio, 1.0f, 1.0f)
+            // rotate X axis
+            * dx::XMMatrixRotationX(-angle)
+            // scaling
+            //* dx::XMMatrixScaling(heightWidthRatio, 1.0f, 1.0f)
+            // translation
+            * dx::XMMatrixTranslation(0.0f, 0.0f, 4.0f)
+            // projection
+            * dx::XMMatrixPerspectiveLH(1.0f, heightWidthRatio, 0.5f, 10.0f)
         )
     };
 
@@ -188,8 +211,10 @@ void DefineInputLayout()
     // Create input elements description, choosing whatever need to send to GPU
     const D3D11_INPUT_ELEMENT_DESC ied[] =
     {
-        { "Position",0,DXGI_FORMAT_R32G32_FLOAT,0,0,D3D11_INPUT_PER_VERTEX_DATA,0 },
-        { "Color",0,DXGI_FORMAT_R32G32B32_FLOAT,0,8,D3D11_INPUT_PER_VERTEX_DATA,0 },
+        //{ "Position",0,DXGI_FORMAT_R32G32_FLOAT,0,0,D3D11_INPUT_PER_VERTEX_DATA,0 },
+        { "Position",0,DXGI_FORMAT_R32G32B32_FLOAT,0,0,D3D11_INPUT_PER_VERTEX_DATA,0 },
+        //{ "Color",0,DXGI_FORMAT_R32G32B32_FLOAT,0,8,D3D11_INPUT_PER_VERTEX_DATA,0 },
+        { "Color",0,DXGI_FORMAT_R32G32B32_FLOAT,0,12,D3D11_INPUT_PER_VERTEX_DATA,0 },
     };
 
     // Create input layout, using the description Defined above