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Optimize vertex shader using mat3x4 to reduce bandwidth, load/store operations and ALUs

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clayjohn
2025-06-23 23:06:11 -07:00
parent 9283328fe7
commit 14b60f2264
11 changed files with 211 additions and 138 deletions
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110
servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
View File

@@ -224,23 +224,28 @@ void vertex_shader(vec3 vertex_input,
in vec3 tangent_input,
in vec3 binormal_input,
#endif
in uint instance_index, in uint multimesh_offset, in SceneData scene_data, in mat4 model_matrix, out vec4 screen_pos) {
in uint instance_index, in uint multimesh_offset, in SceneData scene_data, in mat3x4 in_model_matrix,
#ifdef USE_DOUBLE_PRECISION
in vec3 model_precision,
#endif
out vec4 screen_pos) {
vec4 instance_custom = vec4(0.0);
#if defined(COLOR_USED)
color_interp = color_attrib;
#endif
mat4 inv_view_matrix = scene_data.inv_view_matrix;
mat4 inv_view_matrix = transpose(mat4(scene_data.inv_view_matrix[0],
scene_data.inv_view_matrix[1],
scene_data.inv_view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
mat4 model_matrix = transpose(mat4(in_model_matrix[0],
in_model_matrix[1],
in_model_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
#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;
model_matrix[1][3] = 0.0;
model_matrix[2][3] = 0.0;
vec3 view_precision = vec3(inv_view_matrix[0][3], inv_view_matrix[1][3], inv_view_matrix[2][3]);
inv_view_matrix[0][3] = 0.0;
inv_view_matrix[1][3] = 0.0;
inv_view_matrix[2][3] = 0.0;
vec3 view_precision = scene_data.inv_view_precision.xyz;
#endif
mat3 model_normal_matrix;
@@ -404,8 +409,13 @@ void vertex_shader(vec3 vertex_input,
float roughness_highp = 1.0;
mat4 read_view_matrix = transpose(mat4(scene_data.view_matrix[0],
scene_data.view_matrix[1],
scene_data.view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
#ifdef USE_DOUBLE_PRECISION
mat4 modelview = scene_data.view_matrix * model_matrix;
mat4 modelview = read_view_matrix * model_matrix;
// We separate the basis from the origin because the basis is fine with single point precision.
// Then we combine the translations from the model matrix and the view matrix using emulated doubles.
@@ -420,13 +430,12 @@ void vertex_shader(vec3 vertex_input,
// Overwrite the translation part of modelview with improved precision.
vec3 temp_precision; // Will be ignored.
modelview[3].xyz = double_add_vec3(model_origin, model_precision, scene_data.inv_view_matrix[3].xyz, view_precision, temp_precision);
modelview[3].xyz = mat3(scene_data.view_matrix) * modelview[3].xyz;
modelview[3].xyz = double_add_vec3(model_origin, model_precision, inv_view_matrix[3].xyz, view_precision, temp_precision);
modelview[3].xyz = mat3(read_view_matrix) * modelview[3].xyz;
#else
mat4 modelview = scene_data.view_matrix * model_matrix;
mat4 modelview = read_view_matrix * model_matrix;
#endif
mat3 modelview_normal = mat3(scene_data.view_matrix) * model_normal_matrix;
mat4 read_view_matrix = scene_data.view_matrix;
mat3 modelview_normal = mat3(read_view_matrix) * model_normal_matrix;
vec2 read_viewport_size = scene_data.viewport_size;
{
@@ -457,14 +466,14 @@ void vertex_shader(vec3 vertex_input,
//using world coordinates
#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
vertex = (scene_data.view_matrix * vec4(vertex, 1.0)).xyz;
vertex = (read_view_matrix * vec4(vertex, 1.0)).xyz;
#ifdef NORMAL_USED
normal = (scene_data.view_matrix * vec4(normal, 0.0)).xyz;
normal = (read_view_matrix * vec4(normal, 0.0)).xyz;
#endif
#ifdef TANGENT_USED
binormal = (scene_data.view_matrix * vec4(binormal, 0.0)).xyz;
tangent = (scene_data.view_matrix * vec4(tangent, 0.0)).xyz;
binormal = (read_view_matrix * vec4(binormal, 0.0)).xyz;
tangent = (read_view_matrix * vec4(tangent, 0.0)).xyz;
#endif
#endif
@@ -736,8 +745,6 @@ void main() {
instance_index_interp = instance_index;
mat4 model_matrix = instances.data[instance_index].transform;
#ifdef MOTION_VECTORS
// Previous vertex.
vec3 prev_vertex;
@@ -773,7 +780,11 @@ void main() {
prev_tangent,
prev_binormal,
#endif
instance_index, draw_call.multimesh_motion_vectors_previous_offset, scene_data_block.prev_data, instances.data[instance_index].prev_transform, prev_screen_position);
instance_index, draw_call.multimesh_motion_vectors_previous_offset, scene_data_block.prev_data, instances.data[instance_index].prev_transform,
#ifdef USE_DOUBLE_PRECISION
instances.data[instance_index].prev_model_precision.xyz,
#endif
prev_screen_position);
#else
// Unused output.
vec4 screen_position;
@@ -812,7 +823,12 @@ void main() {
tangent,
binormal,
#endif
instance_index, draw_call.multimesh_motion_vectors_current_offset, scene_data_block.data, model_matrix, screen_position);
instance_index, draw_call.multimesh_motion_vectors_current_offset, scene_data_block.data, instances.data[instance_index].transform,
#ifdef USE_DOUBLE_PRECISION
instances.data[instance_index].model_precision.xyz,
#endif
screen_position);
}
#[fragment]
@@ -1085,7 +1101,12 @@ vec4 fog_process(vec3 vertex) {
}
if (abs(scene_data_block.data.fog_height_density) >= 0.0001) {
float y = (scene_data_block.data.inv_view_matrix * vec4(vertex, 1.0)).y;
mat4 inv_view_matrix = transpose(mat4(scene_data_block.data.inv_view_matrix[0],
scene_data_block.data.inv_view_matrix[1],
scene_data_block.data.inv_view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
float y = (inv_view_matrix * vec4(vertex, 1.0)).y;
float y_dist = y - scene_data_block.data.fog_height;
@@ -1244,16 +1265,14 @@ void fragment_shader(in SceneData scene_data) {
vec2 alpha_texture_coordinate = vec2(0.0, 0.0);
#endif // ALPHA_ANTIALIASING_EDGE_USED
mat4 inv_view_matrix = scene_data.inv_view_matrix;
mat4 read_model_matrix = instances.data[instance_index].transform;
#ifdef USE_DOUBLE_PRECISION
read_model_matrix[0][3] = 0.0;
read_model_matrix[1][3] = 0.0;
read_model_matrix[2][3] = 0.0;
inv_view_matrix[0][3] = 0.0;
inv_view_matrix[1][3] = 0.0;
inv_view_matrix[2][3] = 0.0;
#endif
mat4 inv_view_matrix = transpose(mat4(scene_data.inv_view_matrix[0],
scene_data.inv_view_matrix[1],
scene_data.inv_view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
mat4 read_model_matrix = transpose(mat4(instances.data[instance_index].transform[0],
instances.data[instance_index].transform[1],
instances.data[instance_index].transform[2],
vec4(0.0, 0.0, 0.0, 1.0)));
#ifdef LIGHT_VERTEX_USED
vec3 light_vertex = vertex;
@@ -1266,7 +1285,10 @@ void fragment_shader(in SceneData scene_data) {
model_normal_matrix = mat3(read_model_matrix);
}
mat4 read_view_matrix = scene_data.view_matrix;
mat4 read_view_matrix = transpose(mat4(scene_data.view_matrix[0],
scene_data.view_matrix[1],
scene_data.view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
vec2 read_viewport_size = scene_data.viewport_size;
{
@@ -1701,7 +1723,7 @@ void fragment_shader(in SceneData scene_data) {
uint index = instances.data[instance_index].gi_offset;
// The world normal.
vec3 wnormal = mat3(scene_data.inv_view_matrix) * indirect_normal;
vec3 wnormal = mat3(inv_view_matrix) * indirect_normal;
// The SH coefficients used for evaluating diffuse data from SH probes.
const float c[5] = float[](
@@ -1771,9 +1793,9 @@ void fragment_shader(in SceneData scene_data) {
if (sc_use_forward_gi() && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_SDFGI)) { //has lightmap capture
//make vertex orientation the world one, but still align to camera
vec3 cam_pos = mat3(scene_data.inv_view_matrix) * vertex;
vec3 cam_normal = mat3(scene_data.inv_view_matrix) * indirect_normal;
vec3 cam_reflection = mat3(scene_data.inv_view_matrix) * reflect(-view, indirect_normal);
vec3 cam_pos = mat3(inv_view_matrix) * vertex;
vec3 cam_normal = mat3(inv_view_matrix) * indirect_normal;
vec3 cam_reflection = mat3(inv_view_matrix) * reflect(-view, indirect_normal);
//apply y-mult
cam_pos.y *= sdfgi.y_mult;
@@ -1843,9 +1865,9 @@ void fragment_shader(in SceneData scene_data) {
if (sc_use_forward_gi() && bool(instances.data[instance_index].flags & INSTANCE_FLAGS_USE_VOXEL_GI)) { // process voxel_gi_instances
uint index1 = instances.data[instance_index].gi_offset & 0xFFFF;
// Make vertex orientation the world one, but still align to camera.
vec3 cam_pos = mat3(scene_data.inv_view_matrix) * vertex;
vec3 cam_normal = mat3(scene_data.inv_view_matrix) * indirect_normal;
vec3 ref_vec = mat3(scene_data.inv_view_matrix) * normalize(reflect(-view, indirect_normal));
vec3 cam_pos = mat3(inv_view_matrix) * vertex;
vec3 cam_normal = mat3(inv_view_matrix) * indirect_normal;
vec3 ref_vec = mat3(inv_view_matrix) * normalize(reflect(-view, indirect_normal));
//find arbitrary tangent and bitangent, then build a matrix
vec3 v0 = abs(cam_normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(0.0, 1.0, 0.0);
@@ -2676,7 +2698,7 @@ void fragment_shader(in SceneData scene_data) {
vec3(0, -1, 0),
vec3(0, 0, -1));
vec3 cam_normal = mat3(scene_data.inv_view_matrix) * normalize(normal_interp);
vec3 cam_normal = mat3(inv_view_matrix) * normalize(normal_interp);
float closest_dist = -1e20;

14
servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered_inc.glsl
View File

@@ -313,16 +313,20 @@ implementation_data_block;
#define implementation_data implementation_data_block.data
struct InstanceData {
mat4 transform;
mat4 prev_transform;
mat3x4 transform;
vec4 compressed_aabb_position_pad; // Only .xyz is used. .w is padding.
vec4 compressed_aabb_size_pad; // Only .xyz is used. .w is padding.
vec4 uv_scale;
uint flags;
uint instance_uniforms_ofs; //base offset in global buffer for instance variables
uint gi_offset; //GI information when using lightmapping (VCT or lightmap index)
uint layer_mask;
mat3x4 prev_transform;
vec4 lightmap_uv_scale;
vec4 compressed_aabb_position_pad; // Only .xyz is used. .w is padding.
vec4 compressed_aabb_size_pad; // Only .xyz is used. .w is padding.
vec4 uv_scale;
#ifdef USE_DOUBLE_PRECISION
vec4 model_precision;
vec4 prev_model_precision;
#endif
};
layout(set = 1, binding = 2, std430) buffer restrict readonly InstanceDataBuffer {