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GLTF: Add more accessor component types

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Aaron Franke 2024-07-10 01:39:04 -07:00
parent 4b0085ac85
commit c7391d2ee3
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GPG Key ID: 40A1750B977E56BF
4 changed files with 141 additions and 0 deletions
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15
modules/gltf/doc_classes/GLTFAccessor.xml
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@ -95,11 +95,26 @@
<constant name="COMPONENT_TYPE_UNSIGNED_SHORT" value="5123" enum="GLTFComponentType">
Component type "UNSIGNED_SHORT". The value is [code]0x1403[/code] which comes from OpenGL. This indicates data is stored in 2-byte or 16-bit unsigned integers. This is a core part of the glTF specification.
</constant>
<constant name="COMPONENT_TYPE_SIGNED_INT" value="5124" enum="GLTFComponentType">
Component type "INT". The value is [code]0x1404[/code] which comes from OpenGL. This indicates data is stored in 4-byte or 32-bit signed integers. This is NOT a core part of the glTF specification, and may not be supported by all glTF importers. May be used by some extensions including [code]KHR_interactivity[/code].
</constant>
<constant name="COMPONENT_TYPE_UNSIGNED_INT" value="5125" enum="GLTFComponentType">
Component type "UNSIGNED_INT". The value is [code]0x1405[/code] which comes from OpenGL. This indicates data is stored in 4-byte or 32-bit unsigned integers. This is a core part of the glTF specification.
</constant>
<constant name="COMPONENT_TYPE_SINGLE_FLOAT" value="5126" enum="GLTFComponentType">
Component type "FLOAT". The value is [code]0x1406[/code] which comes from OpenGL. This indicates data is stored in 4-byte or 32-bit floating point numbers. This is a core part of the glTF specification.
</constant>
<constant name="COMPONENT_TYPE_DOUBLE_FLOAT" value="5130" enum="GLTFComponentType">
Component type "DOUBLE". The value is [code]0x140A[/code] which comes from OpenGL. This indicates data is stored in 8-byte or 64-bit floating point numbers. This is NOT a core part of the glTF specification, and may not be supported by all glTF importers. May be used by some extensions including [code]KHR_interactivity[/code].
</constant>
<constant name="COMPONENT_TYPE_HALF_FLOAT" value="5131" enum="GLTFComponentType">
Component type "HALF_FLOAT". The value is [code]0x140B[/code] which comes from OpenGL. This indicates data is stored in 2-byte or 16-bit floating point numbers. This is NOT a core part of the glTF specification, and may not be supported by all glTF importers. May be used by some extensions including [code]KHR_interactivity[/code].
</constant>
<constant name="COMPONENT_TYPE_SIGNED_LONG" value="5134" enum="GLTFComponentType">
Component type "LONG". The value is [code]0x140E[/code] which comes from OpenGL. This indicates data is stored in 8-byte or 64-bit signed integers. This is NOT a core part of the glTF specification, and may not be supported by all glTF importers. May be used by some extensions including [code]KHR_interactivity[/code].
</constant>
<constant name="COMPONENT_TYPE_UNSIGNED_LONG" value="5135" enum="GLTFComponentType">
Component type "UNSIGNED_LONG". The value is [code]0x140F[/code] which comes from OpenGL. This indicates data is stored in 8-byte or 64-bit unsigned integers. This is NOT a core part of the glTF specification, and may not be supported by all glTF importers. May be used by some extensions including [code]KHR_interactivity[/code].
</constant>
</constants>
</class>

116
modules/gltf/gltf_document.cpp
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@ -1098,10 +1098,20 @@ String GLTFDocument::_get_component_type_name(const GLTFAccessor::GLTFComponentT
return "Short";
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_SHORT:
return "UShort";
case GLTFAccessor::COMPONENT_TYPE_SIGNED_INT:
return "Int";
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_INT:
return "UInt";
case GLTFAccessor::COMPONENT_TYPE_SINGLE_FLOAT:
return "Float";
case GLTFAccessor::COMPONENT_TYPE_DOUBLE_FLOAT:
return "Double";
case GLTFAccessor::COMPONENT_TYPE_HALF_FLOAT:
return "Half";
case GLTFAccessor::COMPONENT_TYPE_SIGNED_LONG:
return "Long";
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_LONG:
return "ULong";
}
return "<Error>";
@ -1260,6 +1270,26 @@ Error GLTFDocument::_encode_buffer_view(Ref<GLTFState> p_state, const double *p_
memcpy(gltf_buffer.ptrw() + old_size, buffer.ptrw(), buffer.size() * sizeof(uint16_t));
bv->byte_length = buffer.size() * sizeof(uint16_t);
} break;
case GLTFAccessor::COMPONENT_TYPE_SIGNED_INT: {
Vector<int32_t> buffer;
buffer.resize(p_count * component_count);
int32_t dst_i = 0;
for (int i = 0; i < p_count; i++) {
for (int j = 0; j < component_count; j++) {
if (skip_every && j > 0 && (j % skip_every) == 0) {
dst_i += skip_bytes;
}
double d = *p_src;
buffer.write[dst_i] = d;
p_src++;
dst_i++;
}
}
int64_t old_size = gltf_buffer.size();
gltf_buffer.resize(old_size + (buffer.size() * sizeof(uint32_t)));
memcpy(gltf_buffer.ptrw() + old_size, buffer.ptrw(), buffer.size() * sizeof(uint32_t));
bv->byte_length = buffer.size() * sizeof(uint32_t);
} break;
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_INT: {
Vector<uint32_t> buffer;
buffer.resize(p_count * component_count);
@ -1300,6 +1330,71 @@ Error GLTFDocument::_encode_buffer_view(Ref<GLTFState> p_state, const double *p_
memcpy(gltf_buffer.ptrw() + old_size, buffer.ptrw(), buffer.size() * sizeof(float));
bv->byte_length = buffer.size() * sizeof(float);
} break;
case GLTFAccessor::COMPONENT_TYPE_DOUBLE_FLOAT: {
Vector<double> buffer;
buffer.resize(p_count * component_count);
int32_t dst_i = 0;
for (int i = 0; i < p_count; i++) {
for (int j = 0; j < component_count; j++) {
if (skip_every && j > 0 && (j % skip_every) == 0) {
dst_i += skip_bytes;
}
double d = *p_src;
buffer.write[dst_i] = d;
p_src++;
dst_i++;
}
}
int64_t old_size = gltf_buffer.size();
gltf_buffer.resize(old_size + (buffer.size() * sizeof(double)));
memcpy(gltf_buffer.ptrw() + old_size, buffer.ptrw(), buffer.size() * sizeof(double));
bv->byte_length = buffer.size() * sizeof(double);
} break;
case GLTFAccessor::COMPONENT_TYPE_HALF_FLOAT: {
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "glTF: Half float not supported yet.");
} break;
case GLTFAccessor::COMPONENT_TYPE_SIGNED_LONG: {
Vector<int64_t> buffer;
buffer.resize(p_count * component_count);
int32_t dst_i = 0;
for (int i = 0; i < p_count; i++) {
for (int j = 0; j < component_count; j++) {
if (skip_every && j > 0 && (j % skip_every) == 0) {
dst_i += skip_bytes;
}
// FIXME: This can result in precision loss because int64_t can store some values that double can't.
double d = *p_src;
buffer.write[dst_i] = d;
p_src++;
dst_i++;
}
}
int64_t old_size = gltf_buffer.size();
gltf_buffer.resize(old_size + (buffer.size() * sizeof(int64_t)));
memcpy(gltf_buffer.ptrw() + old_size, buffer.ptrw(), buffer.size() * sizeof(int64_t));
bv->byte_length = buffer.size() * sizeof(int64_t);
} break;
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_LONG: {
Vector<uint64_t> buffer;
buffer.resize(p_count * component_count);
int32_t dst_i = 0;
for (int i = 0; i < p_count; i++) {
for (int j = 0; j < component_count; j++) {
if (skip_every && j > 0 && (j % skip_every) == 0) {
dst_i += skip_bytes;
}
// FIXME: This can result in precision loss because int64_t can store some values that double can't.
double d = *p_src;
buffer.write[dst_i] = d;
p_src++;
dst_i++;
}
}
int64_t old_size = gltf_buffer.size();
gltf_buffer.resize(old_size + (buffer.size() * sizeof(uint64_t)));
memcpy(gltf_buffer.ptrw() + old_size, buffer.ptrw(), buffer.size() * sizeof(uint64_t));
bv->byte_length = buffer.size() * sizeof(uint64_t);
} break;
}
ERR_FAIL_COND_V(buffer_end > bv->byte_length, ERR_INVALID_DATA);
@ -1388,12 +1483,27 @@ Error GLTFDocument::_decode_buffer_view(Ref<GLTFState> p_state, double *p_dst, c
d = double(s);
}
} break;
case GLTFAccessor::COMPONENT_TYPE_SIGNED_INT: {
d = *(int32_t *)src;
} break;
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_INT: {
d = *(uint32_t *)src;
} break;
case GLTFAccessor::COMPONENT_TYPE_SINGLE_FLOAT: {
d = *(float *)src;
} break;
case GLTFAccessor::COMPONENT_TYPE_DOUBLE_FLOAT: {
d = *(double *)src;
} break;
case GLTFAccessor::COMPONENT_TYPE_HALF_FLOAT: {
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "glTF: Half float not supported yet.");
} break;
case GLTFAccessor::COMPONENT_TYPE_SIGNED_LONG: {
d = *(int64_t *)src;
} break;
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_LONG: {
d = *(uint64_t *)src;
} break;
}
*p_dst++ = d;
@ -1413,10 +1523,16 @@ int GLTFDocument::_get_component_type_size(const GLTFAccessor::GLTFComponentType
return 1;
case GLTFAccessor::COMPONENT_TYPE_SIGNED_SHORT:
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_SHORT:
case GLTFAccessor::COMPONENT_TYPE_HALF_FLOAT:
return 2;
case GLTFAccessor::COMPONENT_TYPE_SIGNED_INT:
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_INT:
case GLTFAccessor::COMPONENT_TYPE_SINGLE_FLOAT:
return 4;
case GLTFAccessor::COMPONENT_TYPE_DOUBLE_FLOAT:
case GLTFAccessor::COMPONENT_TYPE_SIGNED_LONG:
case GLTFAccessor::COMPONENT_TYPE_UNSIGNED_LONG:
return 8;
}
ERR_FAIL_V(0);
}

5
modules/gltf/structures/gltf_accessor.cpp
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@ -44,8 +44,13 @@ void GLTFAccessor::_bind_methods() {
BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_BYTE);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_SIGNED_SHORT);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_SHORT);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_SIGNED_INT);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_INT);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_SINGLE_FLOAT);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_DOUBLE_FLOAT);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_HALF_FLOAT);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_SIGNED_LONG);
BIND_ENUM_CONSTANT(COMPONENT_TYPE_UNSIGNED_LONG);
ClassDB::bind_method(D_METHOD("get_buffer_view"), &GLTFAccessor::get_buffer_view);
ClassDB::bind_method(D_METHOD("set_buffer_view", "buffer_view"), &GLTFAccessor::set_buffer_view);

5
modules/gltf/structures/gltf_accessor.h
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@ -56,8 +56,13 @@ public:
COMPONENT_TYPE_UNSIGNED_BYTE = 5121,
COMPONENT_TYPE_SIGNED_SHORT = 5122,
COMPONENT_TYPE_UNSIGNED_SHORT = 5123,
COMPONENT_TYPE_SIGNED_INT = 5124,
COMPONENT_TYPE_UNSIGNED_INT = 5125,
COMPONENT_TYPE_SINGLE_FLOAT = 5126,
COMPONENT_TYPE_DOUBLE_FLOAT = 5130,
COMPONENT_TYPE_HALF_FLOAT = 5131,
COMPONENT_TYPE_SIGNED_LONG = 5134,
COMPONENT_TYPE_UNSIGNED_LONG = 5135,
};
private: