17_vertex_input.diff

diff --git a/../steps/16_swap_chain_recreation/main.go b/../steps/17_vertex_input/main.go
index 4d47c48..249e800 100644
--- a/../steps/16_swap_chain_recreation/main.go
+++ b/../steps/17_vertex_input/main.go
@@ -14,6 +14,7 @@ import (
 	"github.com/vkngwrapper/extensions/v2/khr_swapchain"
 	vkng_sdl2 "github.com/vkngwrapper/integrations/sdl2/v2"
 	"log"
+	"unsafe"
 )
 
 //go:embed shaders
@@ -41,6 +42,46 @@ type SwapChainSupportDetails struct {
 	PresentModes []khr_surface.PresentMode
 }
 
+type Vertex struct {
+	X, Y    float32 // Could also be Position Vector2 - as long as Vector2 is a value, not a pointer
+	R, G, B float32 // Could also be Color Vector3
+}
+
+func getVertexBindingDescription() []core1_0.VertexInputBindingDescription {
+	v := Vertex{}
+	return []core1_0.VertexInputBindingDescription{
+		{
+			Binding:   0,
+			Stride:    int(unsafe.Sizeof(v)),
+			InputRate: core1_0.VertexInputRateVertex,
+		},
+	}
+}
+
+func getVertexAttributeDescriptions() []core1_0.VertexInputAttributeDescription {
+	v := Vertex{}
+	return []core1_0.VertexInputAttributeDescription{
+		{
+			Binding:  0,
+			Location: 0,
+			Format:   core1_0.FormatR32G32SignedFloat,
+			Offset:   int(unsafe.Offsetof(v.X)),
+		},
+		{
+			Binding:  0,
+			Location: 1,
+			Format:   core1_0.FormatR32G32B32SignedFloat,
+			Offset:   int(unsafe.Offsetof(v.R)),
+		},
+	}
+}
+
+var vertices = []Vertex{
+	{X: 0, Y: -0.5, R: 1, G: 0, B: 0},
+	{X: 0.5, Y: 0.5, R: 0, G: 1, B: 0},
+	{X: -0.5, Y: 0.5, R: 0, G: 0, B: 1},
+}
+
 type HelloTriangleApplication struct {
 	window *sdl.Window
 	loader core.Loader
@@ -695,7 +736,10 @@ func (app *HelloTriangleApplication) createGraphicsPipeline() error {
 	}
 	defer fragShader.Destroy(nil)
 
-	vertexInput := &core1_0.PipelineVertexInputStateCreateInfo{}
+	vertexInput := &core1_0.PipelineVertexInputStateCreateInfo{
+		VertexBindingDescriptions:   getVertexBindingDescription(),
+		VertexAttributeDescriptions: getVertexAttributeDescriptions(),
+	}
 
 	inputAssembly := &core1_0.PipelineInputAssemblyStateCreateInfo{
 		Topology:               core1_0.PrimitiveTopologyTriangleList,