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working mesh shader

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This commit is contained in:
Jorijn van der Graaf 2025-04-19 23:59:27 +02:00
commit 97ca634108
18 changed files with 2591 additions and 340 deletions
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52
test.mesh
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@ -1,16 +1,52 @@
/* Copyright (c) 2021, Sascha Willems
*
* SPDX-License-Identifier: MIT
*
*/
#version 450
#extension GL_EXT_mesh_shader : require
layout (binding = 0) uniform UBO
{
mat4 projection;
mat4 model;
mat4 view;
} ubo;
layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
layout(triangles, max_vertices = 3, max_primitives = 1) out;
layout(location = 0) out VertexOutput
{
vec4 color;
} vertexOutput[];
const vec4[3] positions = {
vec4( 0.0, -1.0, 0.0, 1.0),
vec4(-1.0, 1.0, 0.0, 1.0),
vec4( 1.0, 1.0, 0.0, 1.0)
};
const vec4[3] colors = {
vec4(0.0, 1.0, 0.0, 1.0),
vec4(0.0, 0.0, 1.0, 1.0),
vec4(1.0, 0.0, 0.0, 1.0)
};
void main()
{
uint vertexCount = 3;
uint triangleCount = 1;
SetMeshOutputsEXT(vertexCount, triangleCount);
gl_MeshVerticesEXT[0].gl_Position = vec4(0.5,-0.5, 0, 1);
gl_MeshVerticesEXT[1].gl_Position = vec4(0.5, 0.5, 0, 1);
gl_MeshVerticesEXT[2].gl_Position = vec4(-0.5, 0.5, 0, 1);
gl_PrimitiveTriangleIndicesEXT[0] = uvec3(0, 1, 2);
}
uint iid = gl_LocalInvocationID.x;
vec4 offset = vec4(0.0, 0.0, gl_GlobalInvocationID.x, 0.0);
SetMeshOutputsEXT(3, 1);
mat4 mvp = ubo.projection * ubo.view * ubo.model;
gl_MeshVerticesEXT[0].gl_Position = mvp * (positions[0] + offset);
gl_MeshVerticesEXT[1].gl_Position = mvp * (positions[1] + offset);
gl_MeshVerticesEXT[2].gl_Position = mvp * (positions[2] + offset);
vertexOutput[0].color = colors[0];
vertexOutput[1].color = colors[1];
vertexOutput[2].color = colors[2];
gl_PrimitiveTriangleIndicesEXT[gl_LocalInvocationIndex] = uvec3(0, 1, 2);
}