Merge pull request #72485 from BastiaanOlij/add_eye_matrix_access

Expose EYE_OFFSET to gdshader code

5 files changed, 14 insertions, 2 deletions

diff --git a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
index 2aaea4288b..d8e77366de 100644
--- a/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
+++ b/servers/rendering/renderer_rd/forward_clustered/scene_shader_forward_clustered.cpp
@@ -625,6 +625,7 @@ void SceneShaderForwardClustered::init(const String p_defines) {
 		actions.renames["VIEW_INDEX"] = "ViewIndex";
 		actions.renames["VIEW_MONO_LEFT"] = "0";
 		actions.renames["VIEW_RIGHT"] = "1";
+		actions.renames["EYE_OFFSET"] = "eye_offset";
 
 		//for light
 		actions.renames["VIEW"] = "view";
diff --git a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
index f9eecf4dc7..cc4a7dfa47 100644
--- a/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
+++ b/servers/rendering/renderer_rd/forward_mobile/scene_shader_forward_mobile.cpp
@@ -517,6 +517,7 @@ void SceneShaderForwardMobile::init(const String p_defines) {
 		actions.renames["VIEW_INDEX"] = "ViewIndex";
 		actions.renames["VIEW_MONO_LEFT"] = "0";
 		actions.renames["VIEW_RIGHT"] = "1";
+		actions.renames["EYE_OFFSET"] = "eye_offset";
 
 		//for light
 		actions.renames["VIEW"] = "view";
diff --git a/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl b/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
index c6a3c42e57..21fa7fa148 100644
--- a/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
+++ b/servers/rendering/renderer_rd/shaders/forward_clustered/scene_forward_clustered.glsl
@@ -315,9 +315,11 @@ void vertex_shader(in uint instance_index, in bool is_multimesh, in uint multime
 #ifdef USE_MULTIVIEW
 	mat4 projection_matrix = scene_data.projection_matrix_view[ViewIndex];
 	mat4 inv_projection_matrix = scene_data.inv_projection_matrix_view[ViewIndex];
+	vec3 eye_offset = scene_data.eye_offset[ViewIndex].xyz;
 #else
 	mat4 projection_matrix = scene_data.projection_matrix;
 	mat4 inv_projection_matrix = scene_data.inv_projection_matrix;
+	vec3 eye_offset = vec3(0.0, 0.0, 0.0);
 #endif //USE_MULTIVIEW
 
 //using world coordinates
@@ -722,8 +724,10 @@ void fragment_shader(in SceneData scene_data) {
 	//lay out everything, whatever is unused is optimized away anyway
 	vec3 vertex = vertex_interp;
 #ifdef USE_MULTIVIEW
-	vec3 view = -normalize(vertex_interp - scene_data.eye_offset[ViewIndex].xyz);
+	vec3 eye_offset = scene_data.eye_offset[ViewIndex].xyz;
+	vec3 view = -normalize(vertex_interp - eye_offset);
 #else
+	vec3 eye_offset = vec3(0.0, 0.0, 0.0);
 	vec3 view = -normalize(vertex_interp);
 #endif
 	vec3 albedo = vec3(1.0);
diff --git a/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl b/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
index 90e902ca33..a8b28bbd4f 100644
--- a/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
+++ b/servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
@@ -314,9 +314,11 @@ void main() {
 #ifdef USE_MULTIVIEW
 	mat4 projection_matrix = scene_data.projection_matrix_view[ViewIndex];
 	mat4 inv_projection_matrix = scene_data.inv_projection_matrix_view[ViewIndex];
+	vec3 eye_offset = scene_data.eye_offset[ViewIndex].xyz;
 #else
 	mat4 projection_matrix = scene_data.projection_matrix;
 	mat4 inv_projection_matrix = scene_data.inv_projection_matrix;
+	vec3 eye_offset = vec3(0.0, 0.0, 0.0);
 #endif //USE_MULTIVIEW
 
 //using world coordinates
@@ -671,8 +673,10 @@ void main() {
 	//lay out everything, whatever is unused is optimized away anyway
 	vec3 vertex = vertex_interp;
 #ifdef USE_MULTIVIEW
-	vec3 view = -normalize(vertex_interp - scene_data.eye_offset[ViewIndex].xyz);
+	vec3 eye_offset = scene_data.eye_offset[ViewIndex].xyz;
+	vec3 view = -normalize(vertex_interp - eye_offset);
 #else
+	vec3 eye_offset = vec3(0.0, 0.0, 0.0);
 	vec3 view = -normalize(vertex_interp);
 #endif
 	vec3 albedo = vec3(1.0);
diff --git a/servers/rendering/shader_types.cpp b/servers/rendering/shader_types.cpp
index a789abcd36..56d00fa1bb 100644
--- a/servers/rendering/shader_types.cpp
+++ b/servers/rendering/shader_types.cpp
@@ -106,6 +106,7 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[RS::SHADER_SPATIAL].functions["vertex"].built_ins["VIEW_INDEX"] = constt(ShaderLanguage::TYPE_INT);
 	shader_modes[RS::SHADER_SPATIAL].functions["vertex"].built_ins["VIEW_MONO_LEFT"] = constt(ShaderLanguage::TYPE_INT);
 	shader_modes[RS::SHADER_SPATIAL].functions["vertex"].built_ins["VIEW_RIGHT"] = constt(ShaderLanguage::TYPE_INT);
+	shader_modes[RS::SHADER_SPATIAL].functions["vertex"].built_ins["EYE_OFFSET"] = constt(ShaderLanguage::TYPE_VEC3);
 
 	shader_modes[RS::SHADER_SPATIAL].functions["fragment"].built_ins["VERTEX"] = constt(ShaderLanguage::TYPE_VEC3);
 	shader_modes[RS::SHADER_SPATIAL].functions["fragment"].built_ins["FRAGCOORD"] = constt(ShaderLanguage::TYPE_VEC4);
@@ -151,6 +152,7 @@ ShaderTypes::ShaderTypes() {
 	shader_modes[RS::SHADER_SPATIAL].functions["fragment"].built_ins["VIEW_INDEX"] = constt(ShaderLanguage::TYPE_INT);
 	shader_modes[RS::SHADER_SPATIAL].functions["fragment"].built_ins["VIEW_MONO_LEFT"] = constt(ShaderLanguage::TYPE_INT);
 	shader_modes[RS::SHADER_SPATIAL].functions["fragment"].built_ins["VIEW_RIGHT"] = constt(ShaderLanguage::TYPE_INT);
+	shader_modes[RS::SHADER_SPATIAL].functions["fragment"].built_ins["EYE_OFFSET"] = constt(ShaderLanguage::TYPE_VEC3);
 
 	shader_modes[RS::SHADER_SPATIAL].functions["fragment"].built_ins["OUTPUT_IS_SRGB"] = constt(ShaderLanguage::TYPE_BOOL);