70 lines
1.8 KiB
Plaintext
70 lines
1.8 KiB
Plaintext
/* Copyright (c) 2025, Sascha Willems
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 the "License";
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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struct VSInput
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{
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float3 Pos;
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float3 Normal;
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};
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[[SpecializationConstant]] const int type = 0;
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struct UBO
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{
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float4x4 projection;
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float4x4 modelview;
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float4x4 skyboxModelview;
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float4x4 inverseModelView;
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float modelscale;
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};
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ConstantBuffer<UBO> ubo;
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struct VSOutput
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{
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float4 Pos : SV_POSITION;
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float3 UVW;
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float3 Normal;
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float3 ViewVec;
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float3 LightVec;
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};
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[shader("vertex")]
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VSOutput main(VSInput input)
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{
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VSOutput output;
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output.UVW = input.Pos;
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float3 worldPos;
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switch (type)
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{
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case 0: // Skybox
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worldPos = mul((float4x3) ubo.skyboxModelview, input.Pos).xyz;
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output.Pos = mul(ubo.projection, float4(worldPos, 1.0));
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break;
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case 1: // Object
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worldPos = mul(ubo.modelview, float4(input.Pos * ubo.modelscale, 1.0)).xyz;
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output.Pos = mul(ubo.projection, mul(ubo.modelview, float4(input.Pos.xyz * ubo.modelscale, 1.0)));
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break;
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}
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output.Normal = mul((float4x3) ubo.modelview, input.Normal).xyz;
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float3 lightPos = float3(0.0f, -5.0f, 5.0f);
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output.LightVec = lightPos.xyz - worldPos.xyz;
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output.ViewVec = -worldPos.xyz;
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return output;
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}
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