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Reduced amount of matrix multiplication in geometry shaders.

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This commit is contained in:
Remco Burema 2019-04-19 23:00:26 +02:00
parent dc68716dac
commit 2e88c172c1
2 changed files with 114 additions and 78 deletions
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96
plugins/SimulationView/layers3d.shader
View File

@ -188,65 +188,83 @@ geometry41core =
g_vertex_offset_vert = vec4(g_vertex_normal_vert * size_y, 0.0);
if ((v_line_type[0] == 8) || (v_line_type[0] == 9)) {
vec4 va_head = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head + g_vertex_offset_vert);
vec4 va_up = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert);
vec4 va_down = viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert);
vec4 vb_head = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head + g_vertex_offset_vert);
vec4 vb_down = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert);
vec4 vb_up = viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert);
// Travels: flat plane with pointy ends
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_head);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_down);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_down);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_up);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_head);
//And reverse so that the line is also visible from the back side.
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_up);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_down);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_down);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_head);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
EndPrimitive();
} else {
vec4 va_m_horz = viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz);
vec4 vb_m_horz = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz);
vec4 va_p_vert = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert);
vec4 vb_p_vert = viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert);
vec4 va_p_horz = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz);
vec4 vb_p_horz = viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz);
vec4 va_m_vert = viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert);
vec4 vb_m_vert = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert);
vec4 va_head = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head);
vec4 vb_head = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head);
// All normal lines are rendered as 3d tubes.
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_p_vert);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_p_vert);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, va_p_horz);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, vb_p_horz);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, va_m_vert);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, vb_m_vert);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
EndPrimitive();
// left side
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_p_vert);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, va_head);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, va_p_horz);
EndPrimitive();
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, va_p_horz);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, va_m_vert);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, va_head);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
EndPrimitive();
// right side
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, vb_p_horz);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_p_vert);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, vb_head);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
EndPrimitive();
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, vb_m_vert);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, vb_head);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, vb_p_horz);
EndPrimitive();
}

96
plugins/SimulationView/layers3d_shadow.shader
View File

@ -142,65 +142,83 @@ geometry41core =
g_vertex_offset_vert = vec4(g_vertex_normal_vert * size_y, 0.0);
if ((v_line_type[0] == 8) || (v_line_type[0] == 9)) {
vec4 va_head = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head + g_vertex_offset_vert);
vec4 va_up = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert);
vec4 va_down = viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert);
vec4 vb_head = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head + g_vertex_offset_vert);
vec4 vb_down = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert);
vec4 vb_up = viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert);
// Travels: flat plane with pointy ends
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_head);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_down);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_down);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_up);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_head);
//And reverse so that the line is also visible from the back side.
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_up);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_down);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_down);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_head);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_up);
EndPrimitive();
} else {
vec4 va_m_horz = viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz);
vec4 vb_m_horz = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz);
vec4 va_p_vert = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert);
vec4 vb_p_vert = viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert);
vec4 va_p_horz = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz);
vec4 vb_p_horz = viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz);
vec4 va_m_vert = viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert);
vec4 vb_m_vert = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert);
vec4 va_head = viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head);
vec4 vb_head = viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head);
// All normal lines are rendered as 3d tubes.
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_p_vert);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_p_vert);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, va_p_horz);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, vb_p_horz);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, va_m_vert);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, vb_m_vert);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
EndPrimitive();
// left side
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_vert, va_p_vert);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, va_head);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, va_p_horz);
EndPrimitive();
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[0].gl_Position + g_vertex_offset_horz_head));
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[0].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz, va_p_horz);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_vert, va_m_vert);
myEmitVertex(v_vertex[0], v_color[0], g_vertex_normal_horz_head, va_head);
myEmitVertex(v_vertex[0], v_color[0], -g_vertex_normal_horz, va_m_horz);
EndPrimitive();
// right side
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, vb_p_horz);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_vert, vb_p_vert);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, vb_head);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
EndPrimitive();
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_vert));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, viewProjectionMatrix * (gl_in[1].gl_Position - g_vertex_offset_horz_head));
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, viewProjectionMatrix * (gl_in[1].gl_Position + g_vertex_offset_horz));
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz, vb_m_horz);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_vert, vb_m_vert);
myEmitVertex(v_vertex[1], v_color[1], -g_vertex_normal_horz_head, vb_head);
myEmitVertex(v_vertex[1], v_color[1], g_vertex_normal_horz, vb_p_horz);
EndPrimitive();
}