56 lines
1.6 KiB
GLSL
56 lines
1.6 KiB
GLSL
#version 450
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/* Copyright (c) 2023-2024, Mobica Limited
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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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layout(binding = 0) uniform Ubo {
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mat4 projection;
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mat4 view;
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mat4 model;
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mat4 viewProjectionInverse;
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} ubo;
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layout(location = 0) out vec3 nearPoint;
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layout(location = 1) out vec3 farPoint;
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layout(location = 2) out mat4 view;
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layout(location = 6) out mat4 projection;
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vec3 unprojectPoint(float x, float y, float z, mat4 viewProjectionInverse) {
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vec4 clipSpacePos = vec4(x, y, z, 1.0);
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vec4 eyeSpacePos = viewProjectionInverse * clipSpacePos;
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return eyeSpacePos.xyz / eyeSpacePos.w;
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}
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vec3 gridPlane[6] = vec3[](
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vec3(1, 1, 0), vec3(-1, -1, 0), vec3(-1, 1, 0),
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vec3(-1, -1, 0), vec3(1, 1, 0), vec3(1, -1, 0)
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);
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void main() {
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vec3 pos = gridPlane[gl_VertexIndex].xyz;
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nearPoint = unprojectPoint(pos.x, pos.y, 0.0, ubo.viewProjectionInverse);
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farPoint = unprojectPoint(pos.x, pos.y, 1.0, ubo.viewProjectionInverse);
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view = ubo.view;
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projection = ubo.projection;
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gl_Position = vec4(pos, 1.0);
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}
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