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2025-09-04 10:54:47 +08:00
commit 6bc8f61b18
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+/* Copyright (c) 2024, Sascha Willems
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 the "License";
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+struct VSInput
+{
+[[vk::location(0)]] float3 Pos : POSITION0;
+[[vk::location(1)]] float3 Normal : NORMAL0;
+[[vk::location(2)]] float2 UV : TEXCOORD0;
+};
+
+struct UBO  {
+	float4x4 projection;
+	float4x4 modelview;
+    float4x4 skyboxModelview;
+    float modelscale;
+};
+[[vk::binding(0, 0)]]
+ConstantBuffer<UBO> ubo : register(b0);
+
+struct VSOutput
+{
+	float4 Pos : SV_POSITION;
+[[vk::location(0)]] float2 UV : TEXCOORD0;
+[[vk::location(1)]] float3 Normal : NORMAL0;
+[[vk::location(2)]] float3 ViewVec : TEXCOORD1;
+[[vk::location(3)]] float3 LightVec : TEXCOORD2;
+};
+
+struct PushConstants
+{
+	float4 offset;
+	float4 color;
+	int object_type;
+};
+[[vk::push_constant]] PushConstants push_constants;
+
+VSOutput main(VSInput input)
+{
+	VSOutput output = (VSOutput)0;
+    float3 worldPos;
+
+	switch(push_constants.object_type) {
+		case 0: // Skybox
+            worldPos = mul((float4x3) ubo.skyboxModelview, input.Pos).xyz;
+			output.Pos = mul(ubo.projection, float4(worldPos, 1.0));
+			break;
+		case 1: // Object
+			float3 localPos = input.Pos * ubo.modelscale + push_constants.offset.xyz;
+            worldPos = mul(ubo.modelview, float4(localPos, 1.0)).xyz;
+            output.Pos = mul(ubo.projection, mul(ubo.modelview, float4(localPos, 1.0)));
+			break;
+	}
+	output.Normal = mul((float4x3)ubo.modelview, input.Normal).xyz;
+	output.UV = input.UV;
+	
+	float3 lightPos = float3(0.0f, -5.0f, 5.0f);
+    output.LightVec = lightPos.xyz - worldPos.xyz;
+    output.ViewVec = -worldPos.xyz;
+	return output;
+}