fix some bug

resources/shaders/140/gcode_options.vs

@@ -0,0 +1,39 @@
+#version 140
+
+in vec3 v_position;
+in vec3 v_normal;
+
+uniform mat4 view_model_matrix;
+uniform mat4 projection_matrix;
+
+uniform samplerBuffer s_position_texture;
+uniform samplerBuffer s_width_height_data_texture;
+uniform samplerBuffer s_segment_texture;
+
+out float moveId;
+out vec3 frag_normal;
+out vec3 frag_pos;
+
+void main()
+{
+    vec4 seg_startEnd_hasPrev = texelFetch(s_segment_texture, gl_InstanceID);
+    int end_index = int(seg_startEnd_hasPrev.y);
+
+    vec4 endPos_mid = texelFetch(s_position_texture, end_index);
+
+    moveId = endPos_mid.w + 0.5;
+
+    vec2 width_height = texelFetch(s_width_height_data_texture, int(moveId)).rg;
+    float width = 1.5 * width_height.x;
+    float height = width_height.y;
+
+    mat4 model_matrix = mat4(
+    width, 0.0,   0.0, 0.0,
+    0.0,   width, 0.0, 0.0,
+    0.0,   0.0,   1.5 * height, 0.0,
+    endPos_mid.x,   endPos_mid.y,   endPos_mid.z - 0.5 * height,  1.0);
+    vec4 final_position = view_model_matrix * model_matrix * vec4(v_position, 1.0);
+    frag_pos = final_position.xyz;
+    frag_normal = normalize(v_normal);
+    gl_Position = projection_matrix * final_position;
+}