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Differential D14604 Diff 50369 source/blender/gpu/shaders/material/gpu_shader_material_tex_environment.glsl

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source/blender/gpu/shaders/material/gpu_shader_material_tex_environment.glsl

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uv = 0.5 * nco.xzz + 0.5; uv = 0.5 * nco.xzz + 0.5;
} }
int node_tex_environment_cubemap_xyz_to_uv(vec3 co, out float u, out float v, out float max_axis)
{
float abs_x = abs(co.x);
float abs_y = abs(co.y);
float abs_z = abs(co.z);
bool is_x_positive = co.x > 0.0 ? true : false;
bool is_y_positive = co.y > 0.0 ? true : false;
bool is_z_positive = co.z > 0.0 ? true : false;
int index = -1;
if (is_x_positive && abs_x >= abs_y && abs_x >= abs_z) {
max_axis = abs_x;
u = co.y;
v = co.z;
index = 0;
}
if (!is_x_positive && abs_x >= abs_y && abs_x >= abs_z) {
max_axis = abs_x;
u = -co.y;
v = co.z;
index = 1;
}
if (is_y_positive && abs_y >= abs_x && abs_y >= abs_z) {
max_axis = abs_y;
u = -co.x;
v = co.z;
index = 2;
}
if (!is_y_positive && abs_y >= abs_x && abs_y >= abs_z) {
max_axis = abs_y;
u = co.x;
v = co.z;
index = 3;
}
if (is_z_positive && abs_z >= abs_x && abs_z >= abs_y) {
max_axis = abs_z;
u = co.x;
v = co.y;
index = 4;
}
if (!is_z_positive && abs_z >= abs_x && abs_z >= abs_y) {
max_axis = abs_z;
u = co.x;
v = co.y;
index = 5;
}
return index;
}
/* As Blender's user facing coordinate system is different from the backend's coordinate system
* (OpenGL) the order of various sides of the cube are handled in the appropriate order. So `[X,
* -X, Y, -Y, Z, -Z]` becomes `[X, -X, -Z, Z, Y, -Y]`. */
void node_tex_environment_cubemap_cross_horizontal(vec3 co, out vec3 uv)
{
float max_axis = 0.0;
float uc = 0.0;
float vc = 0.0;
int index = node_tex_environment_cubemap_xyz_to_uv(co, uc, vc, max_axis);
/* Convert u range from -1 to 1 to 0 to 0.25 (1/4) as the texture space is 4 faces wide. */
float u = 0.125 * (uc / max_axis + 1.0);
/* Convert v range from -1 to 1 to 0 to 0.333.. (1/3) as the texture space is 3 faces high. */
float v = 0.166667 * (vc / max_axis + 1.0);
switch (index) {
case 0: {
u += 0.5;
v += 0.333333;
break;
}
case 1: {
v += 0.333333;
break;
}
case 2: {
u += 0.75;
v += 0.333333;
break;
}
case 3: {
u += 0.25;
v += 0.333333;
break;
}
case 4: {
u += 0.25;
v += 0.666666;
break;
}
case 5: {
u += 0.25;
v = 0.333333 - v;
break;
}
}
uv.x = u;
uv.y = v;
}
void node_tex_environment_cubemap_stripe_horizontal(vec3 co, out vec3 uv)
{
float max_axis = 0.0;
float uc = 0.0;
float vc = 0.0;
int index = node_tex_environment_cubemap_xyz_to_uv(co, uc, vc, max_axis);
/* Convert u range from -1 to 1 to 0 to 0.166667 (1/6) as the texture space is 6 faces wide. */
float u = 0.083333 * (uc / max_axis + 1.0);
/* Convert v range from -1 to 1 to 0 to 1 as the texture space is 1 face high. */
float v = 0.5 * (vc / max_axis + 1.0);
switch (index) {
case 1: {
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Use /* */ and end with a point.

kevindietrich: Use `/* */` and end with a point.
u += 0.166666;
break;
}
case 2: {
u += 0.166666 * 5;
break;
}
case 3: {
u += 0.166666 * 4;
break;
}
case 4: {
u += 0.166666 * 2;
break;
}
case 5: {
u += 0.166666 * 3;
v = 1.0 - v;
break;
}
}
uv.x = u;
uv.y = v;
}
void node_tex_environment_cubemap_stripe_vertical(vec3 co, out vec3 uv)
{
float max_axis = 0.0;
float uc = 0.0;
float vc = 0.0;
int index = node_tex_environment_cubemap_xyz_to_uv(co, uc, vc, max_axis);
/* Convert v range from -1 to 1 to 0 to 1 as the texture space is 1 face high. */
float u = 0.5 * (uc / max_axis + 1.0);
/* Convert u range from -1 to 1 to 0 to 0.166667 (1/6) as the texture space is 6 faces high. */
float v = 0.083333 * (vc / max_axis + 1.0);
switch (index) {
case 0: {
v += 0.166666 * 5;
break;
}
case 1: {
v += 0.166666 * 4;
break;
}
case 3: {
v += 0.166666;
break;
}
case 4: {
v += 0.166666 * 3;
break;
}
case 5: {
v = 0.166666 * 3 - v;
break;
}
}
uv.x = u;
uv.y = v;
}
void node_tex_environment_empty(vec3 co, out vec4 color) void node_tex_environment_empty(vec3 co, out vec4 color)
{ {
color = vec4(1.0, 0.0, 1.0, 1.0); color = vec4(1.0, 0.0, 1.0, 1.0);
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