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feat: allow LoRAs with negative multiplier (leejet#83)

* Allow Loras with negative weight, too.There are a couple of loras, which serve to adjust certain concepts inboth positive and negative directions (like exposure, detail level etc).The current code rejects them if loaded with a negative weight, but Isuggest that this check can simply be dropped.* ignore lora in the case of multiplier == 0.f---------Co-authored-by: Urs Ganse <urs@nerd2nerd.org>Co-authored-by: leejet <leejet714@gmail.com>

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stable-diffusion.cpp

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`‎stable-diffusion.cpp‎`

Lines changed: 3 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -276,9 +276,11 @@ std::pair<std::unordered_map<std::string, float>, std::string> extract_and_remov`
`276`	`276`	`while (std::regex_search(text, matches, re)) {`
`277`	`277`	`std::string filename = matches[1].str();`
`278`	`278`	`float multiplier =std::stof(matches[2].str());`
`279`		`-if (multiplier <0.f) {`
	`279`	`+`
	`280`	`+if (multiplier ==0.f) {`
`280`	`281`	`continue;`
`281`	`282`	`}`
	`283`	`+`
`282`	`284`	`if (filename2multiplier.find(filename) == filename2multiplier.end()) {`
`283`	`285`	`filename2multiplier[filename] = multiplier;`
`284`	`286`	`}else {`

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Commitae1d5dc

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`‎stable-diffusion.cpp‎`

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