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Merge pull request #65628 from JohanAR/particle_billboard_normal

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Calculate MODELVIEW_NORMAL_MATRIX for billboard materials
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Rémi Verschelde 2022-09-14 21:17:30 +02:00 committed by GitHub
parent 6c352c1b8d bb657c04fc
commit fff0970c5a
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 1 deletions
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6
scene/resources/material.cpp
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@ -924,6 +924,7 @@ void BaseMaterial3D::_update_shader() {
if (flags[FLAG_BILLBOARD_KEEP_SCALE]) {
code += " MODELVIEW_MATRIX = MODELVIEW_MATRIX * mat4(vec4(length(MODEL_MATRIX[0].xyz), 0.0, 0.0, 0.0), vec4(0.0, length(MODEL_MATRIX[1].xyz), 0.0, 0.0), vec4(0.0, 0.0, length(MODEL_MATRIX[2].xyz), 0.0), vec4(0.0, 0.0, 0.0, 1.0));\n";
}
code += " MODELVIEW_NORMAL_MATRIX = mat3(MODELVIEW_MATRIX);\n";
} break;
case BILLBOARD_FIXED_Y: {
code += " MODELVIEW_MATRIX = VIEW_MATRIX * mat4(vec4(normalize(cross(vec3(0.0, 1.0, 0.0), INV_VIEW_MATRIX[2].xyz)), 0.0), vec4(0.0, 1.0, 0.0, 0.0), vec4(normalize(cross(INV_VIEW_MATRIX[0].xyz, vec3(0.0, 1.0, 0.0))), 0.0), MODEL_MATRIX[3]);\n";
@ -931,6 +932,7 @@ void BaseMaterial3D::_update_shader() {
if (flags[FLAG_BILLBOARD_KEEP_SCALE]) {
code += " MODELVIEW_MATRIX = MODELVIEW_MATRIX * mat4(vec4(length(MODEL_MATRIX[0].xyz), 0.0, 0.0, 0.0),vec4(0.0, length(MODEL_MATRIX[1].xyz), 0.0, 0.0), vec4(0.0, 0.0, length(MODEL_MATRIX[2].xyz), 0.0), vec4(0.0, 0.0, 0.0, 1.0));\n";
}
code += " MODELVIEW_NORMAL_MATRIX = mat3(MODELVIEW_MATRIX);\n";
} break;
case BILLBOARD_PARTICLES: {
//make billboard
@ -939,6 +941,8 @@ void BaseMaterial3D::_update_shader() {
code += " mat_world = mat_world * mat4(vec4(cos(INSTANCE_CUSTOM.x), -sin(INSTANCE_CUSTOM.x), 0.0, 0.0), vec4(sin(INSTANCE_CUSTOM.x), cos(INSTANCE_CUSTOM.x), 0.0, 0.0), vec4(0.0, 0.0, 1.0, 0.0), vec4(0.0, 0.0, 0.0, 1.0));\n";
//set modelview
code += " MODELVIEW_MATRIX = VIEW_MATRIX * mat_world;\n";
//set modelview normal
code += " MODELVIEW_NORMAL_MATRIX = mat3(MODELVIEW_MATRIX);\n";
//handle animation
code += " float h_frames = float(particles_anim_h_frames);\n";
@ -949,7 +953,7 @@ void BaseMaterial3D::_update_shader() {
code += " particle_frame = clamp(particle_frame, 0.0, particle_total_frames - 1.0);\n";
code += " } else {\n";
code += " particle_frame = mod(particle_frame, particle_total_frames);\n";
code += " }";
code += " }\n";
code += " UV /= vec2(h_frames, v_frames);\n";
code += " UV += vec2(mod(particle_frame, h_frames) / h_frames, floor((particle_frame + 0.5) / h_frames) / v_frames);\n";
} break;