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Implement vertex shading

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This adds support in all backends, but the Compatibility renderer works the best.
Mobile and Forward+ can only support one directional light shader (the first in the tree)
While the Compatibility renderer supports any number of shadows.

Co-authored-by: Clay John <claynjohn@gmail.com>
This commit is contained in:
ywmaa
2023-10-15 03:48:52 +03:00
committed by Rémi Verschelde
parent 76a135926a
commit 0a9ad8f9de
14 changed files with 725 additions and 207 deletions
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190
servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
View File

@@ -156,8 +156,30 @@ vec2 multiview_uv(vec2 uv) {
ivec2 multiview_uv(ivec2 uv) {
return uv;
}
#endif //USE_MULTIVIEW
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
layout(location = 12) highp out vec4 diffuse_light_interp;
layout(location = 13) highp out vec4 specular_light_interp;
#include "../scene_forward_vertex_lights_inc.glsl"
void cluster_get_item_range(uint p_offset, out uint item_min, out uint item_max, out uint item_from, out uint item_to) {
uint item_min_max = cluster_buffer.data[p_offset];
item_min = item_min_max & 0xFFFFu;
item_max = item_min_max >> 16;
item_from = item_min >> 5;
item_to = (item_max == 0) ? 0 : ((item_max - 1) >> 5) + 1; //side effect of how it is stored, as item_max 0 means no elements
}
uint cluster_get_range_clip_mask(uint i, uint z_min, uint z_max) {
int local_min = clamp(int(z_min) - int(i) * 32, 0, 31);
int mask_width = min(int(z_max) - int(z_min), 32 - local_min);
return bitfieldInsert(uint(0), uint(0xFFFFFFFF), local_min, mask_width);
}
#endif // !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
invariant gl_Position;
#GLOBALS
@@ -488,6 +510,145 @@ void vertex_shader(vec3 vertex_input,
screen_pos = gl_Position;
#endif
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
diffuse_light_interp = vec4(0.0);
specular_light_interp = vec4(0.0);
#ifdef USE_MULTIVIEW
vec3 view = -normalize(vertex_interp - eye_offset);
vec2 clip_pos = clamp((combined_projected.xy / combined_projected.w) * 0.5 + 0.5, 0.0, 1.0);
#else
vec3 view = -normalize(vertex_interp);
vec2 clip_pos = clamp((gl_Position.xy / gl_Position.w) * 0.5 + 0.5, 0.0, 1.0);
#endif
uvec2 cluster_pos = uvec2(clip_pos / scene_data.screen_pixel_size) >> implementation_data.cluster_shift;
uint cluster_offset = (implementation_data.cluster_width * cluster_pos.y + cluster_pos.x) * (implementation_data.max_cluster_element_count_div_32 + 32);
uint cluster_z = uint(clamp((-vertex_interp.z / scene_data.z_far) * 32.0, 0.0, 31.0));
{ //omni lights
uint cluster_omni_offset = cluster_offset;
uint item_min;
uint item_max;
uint item_from;
uint item_to;
cluster_get_item_range(cluster_omni_offset + implementation_data.max_cluster_element_count_div_32 + cluster_z, item_min, item_max, item_from, item_to);
for (uint i = item_from; i < item_to; i++) {
uint mask = cluster_buffer.data[cluster_omni_offset + i];
mask &= cluster_get_range_clip_mask(i, item_min, item_max);
uint merged_mask = mask;
while (merged_mask != 0) {
uint bit = findMSB(merged_mask);
merged_mask &= ~(1u << bit);
uint light_index = 32 * i + bit;
if (!bool(omni_lights.data[light_index].mask & instances.data[instance_index].layer_mask)) {
continue; //not masked
}
if (omni_lights.data[light_index].bake_mode == LIGHT_BAKE_STATIC && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) {
continue; // Statically baked light and object uses lightmap, skip
}
light_process_omni_vertex(light_index, vertex, view, normal, roughness,
diffuse_light_interp.rgb, specular_light_interp.rgb);
}
}
}
{ //spot lights
uint cluster_spot_offset = cluster_offset + implementation_data.cluster_type_size;
uint item_min;
uint item_max;
uint item_from;
uint item_to;
cluster_get_item_range(cluster_spot_offset + implementation_data.max_cluster_element_count_div_32 + cluster_z, item_min, item_max, item_from, item_to);
for (uint i = item_from; i < item_to; i++) {
uint mask = cluster_buffer.data[cluster_spot_offset + i];
mask &= cluster_get_range_clip_mask(i, item_min, item_max);
uint merged_mask = mask;
while (merged_mask != 0) {
uint bit = findMSB(merged_mask);
merged_mask &= ~(1u << bit);
uint light_index = 32 * i + bit;
if (!bool(spot_lights.data[light_index].mask & instances.data[instance_index].layer_mask)) {
continue; //not masked
}
if (spot_lights.data[light_index].bake_mode == LIGHT_BAKE_STATIC && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) {
continue; // Statically baked light and object uses lightmap, skip
}
light_process_spot_vertex(light_index, vertex, view, normal, roughness,
diffuse_light_interp.rgb, specular_light_interp.rgb);
}
}
}
{ // Directional light.
// We process the first directional light separately as it may have shadows.
vec3 directional_diffuse = vec3(0.0);
vec3 directional_specular = vec3(0.0);
for (uint i = 0; i < scene_data.directional_light_count; i++) {
if (!bool(directional_lights.data[i].mask & instances.data[draw_call.instance_index].layer_mask)) {
continue; // Not masked, skip.
}
if (directional_lights.data[i].bake_mode == LIGHT_BAKE_STATIC && bool(instances.data[draw_call.instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) {
continue; // Statically baked light and object uses lightmap, skip.
}
if (i == 0) {
light_compute_vertex(normal, directional_lights.data[0].direction, view,
directional_lights.data[0].color * directional_lights.data[0].energy,
true, roughness,
directional_diffuse,
directional_specular);
} else {
light_compute_vertex(normal, directional_lights.data[i].direction, view,
directional_lights.data[i].color * directional_lights.data[i].energy,
true, roughness,
diffuse_light_interp.rgb,
specular_light_interp.rgb);
}
}
// Calculate the contribution from the shadowed light so we can scale the shadows accordingly.
float diff_avg = dot(diffuse_light_interp.rgb, vec3(0.33333));
float diff_dir_avg = dot(directional_diffuse, vec3(0.33333));
if (diff_avg > 0.0) {
diffuse_light_interp.a = diff_dir_avg / (diff_avg + diff_dir_avg);
} else {
diffuse_light_interp.a = 1.0;
}
diffuse_light_interp.rgb += directional_diffuse;
float spec_avg = dot(specular_light_interp.rgb, vec3(0.33333));
float spec_dir_avg = dot(directional_specular, vec3(0.33333));
if (spec_avg > 0.0) {
specular_light_interp.a = spec_dir_avg / (spec_avg + spec_dir_avg);
} else {
specular_light_interp.a = 1.0;
}
specular_light_interp.rgb += directional_specular;
}
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
#ifdef MODE_RENDER_DEPTH
if (scene_data.pancake_shadows) {
if (gl_Position.z >= 0.9999) {
@@ -791,7 +952,10 @@ ivec2 multiview_uv(ivec2 uv) {
return uv;
}
#endif //USE_MULTIVIEW
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
layout(location = 12) highp in vec4 diffuse_light_interp;
layout(location = 13) highp in vec4 specular_light_interp;
#endif
//defines to keep compatibility with vertex
#ifdef USE_MULTIVIEW
@@ -1375,7 +1539,6 @@ void fragment_shader(in SceneData scene_data) {
vec3 specular_light = vec3(0.0, 0.0, 0.0);
vec3 diffuse_light = vec3(0.0, 0.0, 0.0);
vec3 ambient_light = vec3(0.0, 0.0, 0.0);
#ifndef MODE_UNSHADED
// Used in regular draw pass and when drawing SDFs for SDFGI and materials for VoxelGI.
emission *= scene_data.emissive_exposure_normalization;
@@ -1836,6 +1999,11 @@ void fragment_shader(in SceneData scene_data) {
// LIGHTING
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#ifdef USE_VERTEX_LIGHTING
diffuse_light += diffuse_light_interp.rgb;
specular_light += specular_light_interp.rgb * f0;
#endif
{ // Directional light.
// Do shadow and lighting in two passes to reduce register pressure.
@@ -1843,10 +2011,15 @@ void fragment_shader(in SceneData scene_data) {
uint shadow0 = 0;
uint shadow1 = 0;
#ifdef USE_VERTEX_LIGHTING
// Only process the first light's shadow for vertex lighting.
for (uint i = 0; i < 1; i++) {
#else
for (uint i = 0; i < 8; i++) {
if (i >= scene_data.directional_light_count) {
break;
}
#endif
if (!bool(directional_lights.data[i].mask & instances.data[instance_index].layer_mask)) {
continue; //not masked
@@ -2044,6 +2217,11 @@ void fragment_shader(in SceneData scene_data) {
shadow = mix(shadow, 1.0, smoothstep(directional_lights.data[i].fade_from, directional_lights.data[i].fade_to, vertex.z)); //done with negative values for performance
#ifdef USE_VERTEX_LIGHTING
diffuse_light *= mix(1.0, shadow, diffuse_light_interp.a);
specular_light *= mix(1.0, shadow, specular_light_interp.a);
#endif
#undef BIAS_FUNC
} // shadows
@@ -2055,6 +2233,8 @@ void fragment_shader(in SceneData scene_data) {
}
#endif // SHADOWS_DISABLED
#ifndef USE_VERTEX_LIGHTING
for (uint i = 0; i < 8; i++) {
if (i >= scene_data.directional_light_count) {
break;
@@ -2175,8 +2355,10 @@ void fragment_shader(in SceneData scene_data) {
diffuse_light,
specular_light);
}
#endif // USE_VERTEX_LIGHTING
}
#ifndef USE_VERTEX_LIGHTING
{ //omni lights
uint cluster_omni_offset = cluster_offset;
@@ -2320,6 +2502,8 @@ void fragment_shader(in SceneData scene_data) {
}
}
}
#endif // !USE_VERTEX_LIGHTING
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#ifdef USE_SHADOW_TO_OPACITY
#ifndef MODE_RENDER_DEPTH
@@ -2334,8 +2518,6 @@ void fragment_shader(in SceneData scene_data) {
#endif // !MODE_RENDER_DEPTH
#endif // USE_SHADOW_TO_OPACITY
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#ifdef MODE_RENDER_DEPTH
#ifdef MODE_RENDER_SDF

326
servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
View File

@@ -105,7 +105,16 @@ layout(location = 4) mediump out vec2 uv2_interp;
layout(location = 5) mediump out vec3 tangent_interp;
layout(location = 6) mediump out vec3 binormal_interp;
#endif
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
layout(location = 7) highp out vec4 diffuse_light_interp;
layout(location = 8) highp out vec4 specular_light_interp;
layout(constant_id = 9) const bool sc_disable_omni_lights = false;
layout(constant_id = 10) const bool sc_disable_spot_lights = false;
layout(constant_id = 12) const bool sc_disable_directional_lights = false;
#include "../scene_forward_vertex_lights_inc.glsl"
#endif // !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
#ifdef MATERIAL_UNIFORMS_USED
/* clang-format off */
layout(set = MATERIAL_UNIFORM_SET, binding = 0, std140) uniform MaterialUniforms {
@@ -185,6 +194,7 @@ void main() {
mat4 model_matrix = instances.data[draw_call.instance_index].transform;
mat4 inv_view_matrix = scene_data.inv_view_matrix;
#ifdef USE_DOUBLE_PRECISION
vec3 model_precision = vec3(model_matrix[0][3], model_matrix[1][3], model_matrix[2][3]);
model_matrix[0][3] = 0.0;
@@ -448,6 +458,107 @@ void main() {
binormal_interp = binormal;
#endif
// VERTEX LIGHTING
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
#ifdef USE_MULTIVIEW
vec3 view = -normalize(vertex_interp - eye_offset);
#else
vec3 view = -normalize(vertex_interp);
#endif
diffuse_light_interp = vec4(0.0);
specular_light_interp = vec4(0.0);
if (!sc_disable_omni_lights) {
uint light_indices = instances.data[draw_call.instance_index].omni_lights.x;
for (uint i = 0; i < 8; i++) {
uint light_index = light_indices & 0xFF;
if (i == 3) {
light_indices = instances.data[draw_call.instance_index].omni_lights.y;
} else {
light_indices = light_indices >> 8;
}
if (light_index == 0xFF) {
break;
}
light_process_omni_vertex(light_index, vertex, view, normal, roughness,
diffuse_light_interp.rgb, specular_light_interp.rgb);
}
}
if (!sc_disable_spot_lights) {
uint light_indices = instances.data[draw_call.instance_index].spot_lights.x;
for (uint i = 0; i < 8; i++) {
uint light_index = light_indices & 0xFF;
if (i == 3) {
light_indices = instances.data[draw_call.instance_index].spot_lights.y;
} else {
light_indices = light_indices >> 8;
}
if (light_index == 0xFF) {
break;
}
light_process_spot_vertex(light_index, vertex, view, normal, roughness,
diffuse_light_interp.rgb, specular_light_interp.rgb);
}
}
if (!sc_disable_directional_lights) {
// We process the first directional light separately as it may have shadows.
vec3 directional_diffuse = vec3(0.0);
vec3 directional_specular = vec3(0.0);
for (uint i = 0; i < scene_data.directional_light_count; i++) {
if (!bool(directional_lights.data[i].mask & instances.data[draw_call.instance_index].layer_mask)) {
continue; // Not masked, skip.
}
if (directional_lights.data[i].bake_mode == LIGHT_BAKE_STATIC && bool(instances.data[draw_call.instance_index].flags & INSTANCE_FLAGS_USE_LIGHTMAP)) {
continue; // Statically baked light and object uses lightmap, skip.
}
if (i == 0) {
light_compute_vertex(normal, directional_lights.data[0].direction, view,
directional_lights.data[0].color * directional_lights.data[0].energy,
true, roughness,
directional_diffuse,
directional_specular);
} else {
light_compute_vertex(normal, directional_lights.data[i].direction, view,
directional_lights.data[i].color * directional_lights.data[i].energy,
true, roughness,
diffuse_light_interp.rgb,
specular_light_interp.rgb);
}
}
// Calculate the contribution from the shadowed light so we can scale the shadows accordingly.
float diff_avg = dot(diffuse_light_interp.rgb, vec3(0.33333));
float diff_dir_avg = dot(directional_diffuse, vec3(0.33333));
if (diff_avg > 0.0) {
diffuse_light_interp.a = diff_dir_avg / (diff_avg + diff_dir_avg);
} else {
diffuse_light_interp.a = 1.0;
}
diffuse_light_interp.rgb += directional_diffuse;
float spec_avg = dot(specular_light_interp.rgb, vec3(0.33333));
float spec_dir_avg = dot(directional_specular, vec3(0.33333));
if (spec_avg > 0.0) {
specular_light_interp.a = spec_dir_avg / (spec_avg + spec_dir_avg);
} else {
specular_light_interp.a = 1.0;
}
specular_light_interp.rgb += directional_specular;
}
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
#ifdef MODE_RENDER_DEPTH
#ifdef MODE_DUAL_PARABOLOID
@@ -564,6 +675,11 @@ layout(location = 5) mediump in vec3 tangent_interp;
layout(location = 6) mediump in vec3 binormal_interp;
#endif
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && defined(USE_VERTEX_LIGHTING)
layout(location = 7) highp in vec4 diffuse_light_interp;
layout(location = 8) highp in vec4 specular_light_interp;
#endif
#ifdef MODE_DUAL_PARABOLOID
layout(location = 9) highp in float dp_clip;
@@ -709,7 +825,7 @@ layout(location = 0) out mediump vec4 frag_color;
#include "../scene_forward_aa_inc.glsl"
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) // && !defined(USE_VERTEX_LIGHTING)
// Default to SPECULAR_SCHLICK_GGX.
#if !defined(SPECULAR_DISABLED) && !defined(SPECULAR_SCHLICK_GGX) && !defined(SPECULAR_TOON)
@@ -718,7 +834,7 @@ layout(location = 0) out mediump vec4 frag_color;
#include "../scene_forward_lights_inc.glsl"
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED) && !defined(USE_VERTEX_LIGHTING)
#ifndef MODE_RENDER_DEPTH
@@ -1401,6 +1517,10 @@ void main() {
// LIGHTING
#if !defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#ifdef USE_VERTEX_LIGHTING
diffuse_light += diffuse_light_interp.rgb;
specular_light += specular_light_interp.rgb * f0;
#endif
if (!sc_disable_directional_lights) { //directional light
#ifndef SHADOWS_DISABLED
@@ -1408,10 +1528,12 @@ void main() {
uint shadow0 = 0;
uint shadow1 = 0;
for (uint i = 0; i < 8; i++) {
if (i >= scene_data.directional_light_count) {
break;
}
#ifdef USE_VERTEX_LIGHTING
// Only process the first light's shadow for vertex lighting.
for (uint i = 0; i < 1; i++) {
#else
for (uint i = 0; i < scene_data.directional_light_count; i++) {
#endif
if (!bool(directional_lights.data[i].mask & instances.data[draw_call.instance_index].layer_mask)) {
continue; //not masked
@@ -1419,164 +1541,6 @@ void main() {
float shadow = 1.0;
// Directional light shadow code is basically the same as forward clustered at this point in time minus `LIGHT_TRANSMITTANCE_USED` support.
// Not sure if there is a reason to change this seeing directional lights are part of our global data
// Should think about whether we may want to move this code into an include file or function??
#ifdef USE_SOFT_SHADOWS
//version with soft shadows, more expensive
if (directional_lights.data[i].shadow_opacity > 0.001) {
float depth_z = -vertex.z;
vec4 pssm_coord;
vec3 light_dir = directional_lights.data[i].direction;
#define BIAS_FUNC(m_var, m_idx) \
m_var.xyz += light_dir * directional_lights.data[i].shadow_bias[m_idx]; \
vec3 normal_bias = normalize(normal_interp) * (1.0 - max(0.0, dot(light_dir, -normalize(normal_interp)))) * directional_lights.data[i].shadow_normal_bias[m_idx]; \
normal_bias -= light_dir * dot(light_dir, normal_bias); \
m_var.xyz += normal_bias;
if (depth_z < directional_lights.data[i].shadow_split_offsets.x) {
vec4 v = vec4(vertex, 1.0);
BIAS_FUNC(v, 0)
pssm_coord = (directional_lights.data[i].shadow_matrix1 * v);
pssm_coord /= pssm_coord.w;
if (directional_lights.data[i].softshadow_angle > 0) {
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
float range_begin = directional_lights.data[i].shadow_range_begin.x;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale1 * test_radius;
shadow = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
} else {
shadow = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale, pssm_coord, scene_data.taa_frame_count);
}
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.y) {
vec4 v = vec4(vertex, 1.0);
BIAS_FUNC(v, 1)
pssm_coord = (directional_lights.data[i].shadow_matrix2 * v);
pssm_coord /= pssm_coord.w;
if (directional_lights.data[i].softshadow_angle > 0) {
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
float range_begin = directional_lights.data[i].shadow_range_begin.y;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale2 * test_radius;
shadow = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
} else {
shadow = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale, pssm_coord, scene_data.taa_frame_count);
}
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.z) {
vec4 v = vec4(vertex, 1.0);
BIAS_FUNC(v, 2)
pssm_coord = (directional_lights.data[i].shadow_matrix3 * v);
pssm_coord /= pssm_coord.w;
if (directional_lights.data[i].softshadow_angle > 0) {
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
float range_begin = directional_lights.data[i].shadow_range_begin.z;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale3 * test_radius;
shadow = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
} else {
shadow = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale, pssm_coord, scene_data.taa_frame_count);
}
} else {
vec4 v = vec4(vertex, 1.0);
BIAS_FUNC(v, 3)
pssm_coord = (directional_lights.data[i].shadow_matrix4 * v);
pssm_coord /= pssm_coord.w;
if (directional_lights.data[i].softshadow_angle > 0) {
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
float range_begin = directional_lights.data[i].shadow_range_begin.w;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale4 * test_radius;
shadow = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
} else {
shadow = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale, pssm_coord, scene_data.taa_frame_count);
}
}
if (directional_lights.data[i].blend_splits) {
float pssm_blend;
float shadow2;
if (depth_z < directional_lights.data[i].shadow_split_offsets.x) {
vec4 v = vec4(vertex, 1.0);
BIAS_FUNC(v, 1)
pssm_coord = (directional_lights.data[i].shadow_matrix2 * v);
pssm_coord /= pssm_coord.w;
if (directional_lights.data[i].softshadow_angle > 0) {
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
float range_begin = directional_lights.data[i].shadow_range_begin.y;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale2 * test_radius;
shadow2 = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
} else {
shadow2 = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale, pssm_coord, scene_data.taa_frame_count);
}
pssm_blend = smoothstep(0.0, directional_lights.data[i].shadow_split_offsets.x, depth_z);
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.y) {
vec4 v = vec4(vertex, 1.0);
BIAS_FUNC(v, 2)
pssm_coord = (directional_lights.data[i].shadow_matrix3 * v);
pssm_coord /= pssm_coord.w;
if (directional_lights.data[i].softshadow_angle > 0) {
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
float range_begin = directional_lights.data[i].shadow_range_begin.z;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale3 * test_radius;
shadow2 = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
} else {
shadow2 = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale, pssm_coord, scene_data.taa_frame_count);
}
pssm_blend = smoothstep(directional_lights.data[i].shadow_split_offsets.x, directional_lights.data[i].shadow_split_offsets.y, depth_z);
} else if (depth_z < directional_lights.data[i].shadow_split_offsets.z) {
vec4 v = vec4(vertex, 1.0);
BIAS_FUNC(v, 3)
pssm_coord = (directional_lights.data[i].shadow_matrix4 * v);
pssm_coord /= pssm_coord.w;
if (directional_lights.data[i].softshadow_angle > 0) {
float range_pos = dot(directional_lights.data[i].direction, v.xyz);
float range_begin = directional_lights.data[i].shadow_range_begin.w;
float test_radius = (range_pos - range_begin) * directional_lights.data[i].softshadow_angle;
vec2 tex_scale = directional_lights.data[i].uv_scale4 * test_radius;
shadow2 = sample_directional_soft_shadow(directional_shadow_atlas, pssm_coord.xyz, tex_scale * directional_lights.data[i].soft_shadow_scale, scene_data.taa_frame_count);
} else {
shadow2 = sample_directional_pcf_shadow(directional_shadow_atlas, scene_data.directional_shadow_pixel_size * directional_lights.data[i].soft_shadow_scale, pssm_coord, scene_data.taa_frame_count);
}
pssm_blend = smoothstep(directional_lights.data[i].shadow_split_offsets.y, directional_lights.data[i].shadow_split_offsets.z, depth_z);
} else {
pssm_blend = 0.0; //if no blend, same coord will be used (divide by z will result in same value, and already cached)
}
pssm_blend = sqrt(pssm_blend);
shadow = mix(shadow, shadow2, pssm_blend);
}
shadow = mix(shadow, 1.0, smoothstep(directional_lights.data[i].fade_from, directional_lights.data[i].fade_to, vertex.z)); //done with negative values for performance
#undef BIAS_FUNC
}
#else
// Soft shadow disabled version
if (directional_lights.data[i].shadow_opacity > 0.001) {
float depth_z = -vertex.z;
@@ -1667,6 +1631,10 @@ void main() {
shadow = mix(shadow, 1.0, smoothstep(directional_lights.data[i].fade_from, directional_lights.data[i].fade_to, vertex.z)); //done with negative values for performance
#ifdef USE_VERTEX_LIGHTING
diffuse_light *= mix(1.0, shadow, diffuse_light_interp.a);
specular_light *= mix(1.0, shadow, specular_light_interp.a);
#endif
#undef BIAS_FUNC
}
#endif
@@ -1678,13 +1646,8 @@ void main() {
}
}
#endif // SHADOWS_DISABLED
for (uint i = 0; i < 8; i++) {
if (i >= scene_data.directional_light_count) {
break;
}
#ifndef USE_VERTEX_LIGHTING
for (uint i = 0; i < scene_data.directional_light_count; i++) {
if (!bool(directional_lights.data[i].mask & instances.data[draw_call.instance_index].layer_mask)) {
continue; //not masked
}
@@ -1703,8 +1666,8 @@ void main() {
#endif
blur_shadow(shadow);
#ifdef DEBUG_DRAW_PSSM_SPLITS
vec3 tint = vec3(1.0);
#ifdef DEBUG_DRAW_PSSM_SPLITS
if (-vertex.z < directional_lights.data[i].shadow_split_offsets.x) {
tint = vec3(1.0, 0.0, 0.0);
} else if (-vertex.z < directional_lights.data[i].shadow_split_offsets.y) {
@@ -1718,12 +1681,10 @@ void main() {
shadow = 1.0;
#endif
light_compute(normal, directional_lights.data[i].direction, normalize(view), 0.0,
#ifndef DEBUG_DRAW_PSSM_SPLITS
directional_lights.data[i].color * directional_lights.data[i].energy,
#else
float size_A = sc_use_light_soft_shadows ? directional_lights.data[i].size : 0.0;
light_compute(normal, directional_lights.data[i].direction, view, size_A,
directional_lights.data[i].color * directional_lights.data[i].energy * tint,
#endif
true, shadow, f0, orms, 1.0, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
@@ -1744,15 +1705,14 @@ void main() {
#endif
#ifdef LIGHT_ANISOTROPY_USED
binormal, tangent, anisotropy,
#endif
#ifdef USE_SOFT_SHADOW
directional_lights.data[i].size,
#endif
diffuse_light,
specular_light);
}
#endif // USE_VERTEX_LIGHTING
} //directional light
#ifndef USE_VERTEX_LIGHTING
if (!sc_disable_omni_lights) { //omni lights
uint light_indices = instances.data[draw_call.instance_index].omni_lights.x;
for (uint i = 0; i < 8; i++) {
@@ -1771,6 +1731,7 @@ void main() {
shadow = blur_shadow(shadow);
// Fragment lighting
light_process_omni(light_index, vertex, view, normal, vertex_ddx, vertex_ddy, f0, orms, shadow, albedo, alpha,
#ifdef LIGHT_BACKLIGHT_USED
backlight,
@@ -1841,6 +1802,9 @@ void main() {
diffuse_light, specular_light);
}
} //spot lights
#endif // !VERTEX_LIGHTING
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#ifdef USE_SHADOW_TO_OPACITY
#ifndef MODE_RENDER_DEPTH
@@ -1855,8 +1819,6 @@ void main() {
#endif // !MODE_RENDER_DEPTH
#endif // USE_SHADOW_TO_OPACITY
#endif //!defined(MODE_RENDER_DEPTH) && !defined(MODE_UNSHADED)
#ifdef MODE_RENDER_DEPTH
#ifdef MODE_RENDER_MATERIAL

82
servers/rendering/renderer_rd/shaders/scene_forward_vertex_lights_inc.glsl Normal file
View File

@@ -0,0 +1,82 @@
// Simplified versions of light functions intended for the vertex shader.
// Eyeballed approximation of `exp2(15.0 * (1.0 - roughness) + 1.0) * 0.25`.
// Uses slightly more FMA instructions (2x rate) to avoid special instructions (0.25x rate).
// Range is reduced to [0.64,4977] from [068,2,221,528] which makes mediump feasible for the rest of the shader.
mediump float roughness_to_shininess(mediump float roughness) {
mediump float r = 1.2 - roughness;
mediump float r2 = r * r;
return r * r2 * r2 * 2000.0;
}
void light_compute_vertex(vec3 N, vec3 L, vec3 V, vec3 light_color, bool is_directional, float roughness,
inout vec3 diffuse_light, inout vec3 specular_light) {
float NdotL = min(dot(N, L), 1.0);
float cNdotL = max(NdotL, 0.0); // clamped NdotL
#if defined(DIFFUSE_LAMBERT_WRAP)
// Energy conserving lambert wrap shader.
// https://web.archive.org/web/20210228210901/http://blog.stevemcauley.com/2011/12/03/energy-conserving-wrapped-diffuse/
float diffuse_brdf_NL = max(0.0, (cNdotL + roughness) / ((1.0 + roughness) * (1.0 + roughness))) * (1.0 / M_PI);
#else
// lambert
float diffuse_brdf_NL = cNdotL * (1.0 / M_PI);
#endif
diffuse_light += light_color * diffuse_brdf_NL;
#if !defined(SPECULAR_DISABLED)
float specular_brdf_NL = 0.0;
// Normalized blinn always unless disabled.
vec3 H = normalize(V + L);
float cNdotH = clamp(dot(N, H), 0.0, 1.0);
float shininess = roughness_to_shininess(roughness);
float blinn = pow(cNdotH, shininess);
blinn *= (shininess + 2.0) * (1.0 / (8.0 * M_PI)) * cNdotL;
specular_brdf_NL = blinn;
specular_light += specular_brdf_NL * light_color;
#endif
}
float get_omni_attenuation(float distance, float inv_range, float decay) {
float nd = distance * inv_range;
nd *= nd;
nd *= nd; // nd^4
nd = max(1.0 - nd, 0.0);
nd *= nd; // nd^2
return nd * pow(max(distance, 0.0001), -decay);
}
void light_process_omni_vertex(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness,
inout vec3 diffuse_light, inout vec3 specular_light) {
vec3 light_rel_vec = omni_lights.data[idx].position - vertex;
float light_length = length(light_rel_vec);
float omni_attenuation = get_omni_attenuation(light_length, omni_lights.data[idx].inv_radius, omni_lights.data[idx].attenuation);
vec3 color = omni_lights.data[idx].color * omni_attenuation;
light_compute_vertex(normal, normalize(light_rel_vec), eye_vec, color, false, roughness,
diffuse_light,
specular_light);
}
void light_process_spot_vertex(uint idx, vec3 vertex, vec3 eye_vec, vec3 normal, float roughness,
inout vec3 diffuse_light,
inout vec3 specular_light) {
vec3 light_rel_vec = spot_lights.data[idx].position - vertex;
float light_length = length(light_rel_vec);
float spot_attenuation = get_omni_attenuation(light_length, spot_lights.data[idx].inv_radius, spot_lights.data[idx].attenuation);
vec3 spot_dir = spot_lights.data[idx].direction;
// This conversion to a highp float is crucial to prevent light leaking
// due to precision errors in the following calculations (cone angle is mediump).
highp float cone_angle = spot_lights.data[idx].cone_angle;
float scos = max(dot(-normalize(light_rel_vec), spot_dir), cone_angle);
float spot_rim = max(0.0001, (1.0 - scos) / (1.0 - cone_angle));
spot_attenuation *= 1.0 - pow(spot_rim, spot_lights.data[idx].cone_attenuation);
vec3 color = spot_lights.data[idx].color * spot_attenuation;
float specular_amount = spot_lights.data[idx].specular_amount;
light_compute_vertex(normal, normalize(light_rel_vec), eye_vec, color, false, roughness,
diffuse_light, specular_light);
}