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shaders/gshader_to_mshader/gshader_to_mshader.geom

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+/* Copyright (c) 2023, Mobica Limited
+ *
+ * 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.
+ */
+#version 450
+
+layout (triangles) in;
+layout (line_strip, max_vertices = 2) out;
+
+layout (binding = 1) uniform UniformBufferObject {
+    mat4 model;
+    mat4 view;
+    mat4 proj;
+} ubo;
+
+layout (location = 0) in vec3 inNormal[];
+layout (location = 0) out vec3 outColor;
+
+void main(void)
+{
+    float normalLength = 0.1f;
+
+    //middle point of triangle
+    vec3 pos = (gl_in[0].gl_Position.xyz + gl_in[1].gl_Position.xyz + gl_in[2].gl_Position.xyz)/3.0f;
+    vec3 normal = inNormal[0].xyz;
+
+    //line vertices
+    gl_Position = ubo.proj * ubo.view * ubo.model * vec4(pos, 1.0f);
+    outColor = vec3(1.0f, 0.0f, 0.0f);
+    EmitVertex();
+
+    gl_Position = ubo.proj * ubo.view * ubo.model * vec4(pos + normal * normalLength, 1.0f);
+    outColor = vec3(0.0f, 0.0f, 1.0f);
+    EmitVertex();
+
+    EndPrimitive();
+}