diff options
Diffstat (limited to 'source/blender/draw/intern/shaders/common_debug_draw_lib.glsl')
| -rw-r--r-- | source/blender/draw/intern/shaders/common_debug_draw_lib.glsl | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/source/blender/draw/intern/shaders/common_debug_draw_lib.glsl b/source/blender/draw/intern/shaders/common_debug_draw_lib.glsl new file mode 100644 index 00000000000..3287897e73c --- /dev/null +++ b/source/blender/draw/intern/shaders/common_debug_draw_lib.glsl @@ -0,0 +1,215 @@ + +/** + * Debugging drawing library + * + * Quick way to draw debug geometry. All input should be in world space and + * will be rendered in the default view. No additional setup required. + **/ + +/** Global switch option. */ +bool drw_debug_draw_enable = true; +const vec4 drw_debug_default_color = vec4(1.0, 0.0, 0.0, 1.0); + +/* -------------------------------------------------------------------- */ +/** \name Internals + * \{ */ + +uint drw_debug_start_draw(uint v_needed) +{ + uint vertid = atomicAdd(drw_debug_draw_v_count, v_needed); + vertid += drw_debug_draw_offset; + return vertid; +} + +uint drw_debug_color_pack(vec4 color) +{ + color = clamp(color, 0.0, 1.0); + uint result = 0; + result |= uint(color.x * 255.0) << 0u; + result |= uint(color.y * 255.0) << 8u; + result |= uint(color.z * 255.0) << 16u; + result |= uint(color.w * 255.0) << 24u; + return result; +} + +void drw_debug_line(inout uint vertid, vec3 v1, vec3 v2, uint color) +{ + drw_debug_verts_buf[vertid++] = DRWDebugVert( + floatBitsToUint(v1.x), floatBitsToUint(v1.y), floatBitsToUint(v1.z), color); + drw_debug_verts_buf[vertid++] = DRWDebugVert( + floatBitsToUint(v2.x), floatBitsToUint(v2.y), floatBitsToUint(v2.z), color); +} + +/** \} */ + +/* -------------------------------------------------------------------- */ +/** \name API + * \{ */ + +/** + * Draw a line. + */ +void drw_debug_line(vec3 v1, vec3 v2, vec4 color) +{ + if (!drw_debug_draw_enable) { + return; + } + const uint v_needed = 2; + uint vertid = drw_debug_start_draw(v_needed); + if (vertid + v_needed < DRW_DEBUG_DRAW_VERT_MAX) { + drw_debug_line(vertid, v1, v2, drw_debug_color_pack(color)); + } +} +void drw_debug_line(vec3 v1, vec3 v2) +{ + drw_debug_line(v1, v2, drw_debug_default_color); +} + +/** + * Draw a quad contour. + */ +void drw_debug_quad(vec3 v1, vec3 v2, vec3 v3, vec3 v4, vec4 color) +{ + if (!drw_debug_draw_enable) { + return; + } + const uint v_needed = 8; + uint vertid = drw_debug_start_draw(v_needed); + if (vertid + v_needed < DRW_DEBUG_DRAW_VERT_MAX) { + uint pcolor = drw_debug_color_pack(color); + drw_debug_line(vertid, v1, v2, pcolor); + drw_debug_line(vertid, v2, v3, pcolor); + drw_debug_line(vertid, v3, v4, pcolor); + drw_debug_line(vertid, v4, v1, pcolor); + } +} +void drw_debug_quad(vec3 v1, vec3 v2, vec3 v3, vec3 v4) +{ + drw_debug_quad(v1, v2, v3, v4, drw_debug_default_color); +} + +/** + * Draw a point as octahedron wireframe. + */ +void drw_debug_point(vec3 p, float radius, vec4 color) +{ + if (!drw_debug_draw_enable) { + return; + } + vec3 c = vec3(radius, -radius, 0); + vec3 v1 = p + c.xzz; + vec3 v2 = p + c.zxz; + vec3 v3 = p + c.yzz; + vec3 v4 = p + c.zyz; + vec3 v5 = p + c.zzx; + vec3 v6 = p + c.zzy; + + const uint v_needed = 12 * 2; + uint vertid = drw_debug_start_draw(v_needed); + if (vertid + v_needed < DRW_DEBUG_DRAW_VERT_MAX) { + uint pcolor = drw_debug_color_pack(color); + drw_debug_line(vertid, v1, v2, pcolor); + drw_debug_line(vertid, v2, v3, pcolor); + drw_debug_line(vertid, v3, v4, pcolor); + drw_debug_line(vertid, v4, v1, pcolor); + drw_debug_line(vertid, v1, v5, pcolor); + drw_debug_line(vertid, v2, v5, pcolor); + drw_debug_line(vertid, v3, v5, pcolor); + drw_debug_line(vertid, v4, v5, pcolor); + drw_debug_line(vertid, v1, v6, pcolor); + drw_debug_line(vertid, v2, v6, pcolor); + drw_debug_line(vertid, v3, v6, pcolor); + drw_debug_line(vertid, v4, v6, pcolor); + } +} +void drw_debug_point(vec3 p, float radius) +{ + drw_debug_point(p, radius, drw_debug_default_color); +} +void drw_debug_point(vec3 p) +{ + drw_debug_point(p, 0.01); +} + +/** + * Draw a sphere wireframe as 3 axes circle. + */ +void drw_debug_sphere(vec3 p, float radius, vec4 color) +{ + if (!drw_debug_draw_enable) { + return; + } + const int circle_resolution = 16; + const uint v_needed = circle_resolution * 2 * 3; + uint vertid = drw_debug_start_draw(v_needed); + if (vertid + v_needed < DRW_DEBUG_DRAW_VERT_MAX) { + uint pcolor = drw_debug_color_pack(color); + for (int axis = 0; axis < 3; axis++) { + for (int edge = 0; edge < circle_resolution; edge++) { + float angle1 = (2.0 * 3.141592) * float(edge + 0) / float(circle_resolution); + vec3 p1 = vec3(cos(angle1), sin(angle1), 0.0) * radius; + p1 = vec3(p1[(0 + axis) % 3], p1[(1 + axis) % 3], p1[(2 + axis) % 3]); + + float angle2 = (2.0 * 3.141592) * float(edge + 1) / float(circle_resolution); + vec3 p2 = vec3(cos(angle2), sin(angle2), 0.0) * radius; + p2 = vec3(p2[(0 + axis) % 3], p2[(1 + axis) % 3], p2[(2 + axis) % 3]); + + drw_debug_line(vertid, p + p1, p + p2, pcolor); + } + } + } +} +void drw_debug_sphere(vec3 p, float radius) +{ + drw_debug_sphere(p, radius, drw_debug_default_color); +} + +/** + * Draw a matrix transformation as 3 colored axes. + */ +void drw_debug_matrix(mat4 mat, vec4 color) +{ + vec4 p[4] = vec4[4](vec4(0, 0, 0, 1), vec4(1, 0, 0, 1), vec4(0, 1, 0, 1), vec4(0, 0, 1, 1)); + for (int i = 0; i < 4; i++) { + p[i] = mat * p[i]; + p[i].xyz /= p[i].w; + } + drw_debug_line(p[0].xyz, p[0].xyz, vec4(1, 0, 0, 1)); + drw_debug_line(p[0].xyz, p[1].xyz, vec4(0, 1, 0, 1)); + drw_debug_line(p[0].xyz, p[2].xyz, vec4(0, 0, 1, 1)); +} +void drw_debug_matrix(mat4 mat) +{ + drw_debug_matrix(mat, drw_debug_default_color); +} + +/** + * Draw a matrix as a 2 units length bounding box, centered on origin. + */ +void drw_debug_matrix_as_bbox(mat4 mat, vec4 color) +{ + vec4 p[8] = vec4[8](vec4(-1, -1, -1, 1), + vec4(1, -1, -1, 1), + vec4(1, 1, -1, 1), + vec4(-1, 1, -1, 1), + vec4(-1, -1, 1, 1), + vec4(1, -1, 1, 1), + vec4(1, 1, 1, 1), + vec4(-1, 1, 1, 1)); + for (int i = 0; i < 8; i++) { + p[i] = mat * p[i]; + p[i].xyz /= p[i].w; + } + drw_debug_quad(p[0].xyz, p[1].xyz, p[2].xyz, p[3].xyz, color); + drw_debug_line(p[0].xyz, p[4].xyz, color); + drw_debug_line(p[1].xyz, p[5].xyz, color); + drw_debug_line(p[2].xyz, p[6].xyz, color); + drw_debug_line(p[3].xyz, p[7].xyz, color); + drw_debug_quad(p[4].xyz, p[5].xyz, p[6].xyz, p[7].xyz, color); +} +void drw_debug_matrix_as_bbox(mat4 mat) +{ + drw_debug_matrix_as_bbox(mat, drw_debug_default_color); +} + +/** \} */ |